Publications of the Williams Group


Bourtsoukidis, E., A. Pozzer, J. Williams, D. Makowski, J. Peñuelas, V. N. Matthaios, G. Lazoglou, A. M. Yañez-Serrano, J. Lelieveld, P. Ciais, M. Vrekoussis, N. Daskalakis & J. Sciare. High temperature sensitivity of monoterpene emissions from global vegetation. Nat. Comms. Earth & Environment, 5, 23, 2024.

Yang, S., Gabriel Bekö, Pawel Wargocki, Meixia Zhang, Marouane Merizak, Athanasios Nenes, Jonathan Williams, and Dusan Licina. Physiology or Psychology: What Drives Human Emissions of Carbon Dioxide and Ammonia? Environ. Sci. Technol. 2024, 58, 4, 1986–1997.



Bensemann, J., H. Cheena, D. T. Jung Huang; E. Broadbent; J. Williams; J. Wicker. From What You See to What We Smell: Linking Human Emotions to Biomarkers in Breath. IEEE Transactions on Affective Computing. 1 – 13. DOI: 10.1109/TAFFC.2023.3275216, 2023.

Ernle, L., M.A. Ringsdorf, and J. Williams. Influence of ozone and humidity on PTR-MS and GC-MS VOC measurements with and without a Na2S2O3 ozone scrubber, Atmos. Meas. Tech., 16, 1179–1194,, 2023.

Ernle, L., N. Wang, G. Bekö, G. Morrison, P. Wargocki, C. J. Weschler and  J. Williams.  Assessment of aldehyde contributions to PTR-MS m/z 69.07 in indoor air measurements. Environmental Science: Atmospheres. DOI  , in press.     

Gomes Alves, E., R. A. Santana, C. Q. Dias-Júnior, S. Botía, T. Taylor, A. M. Yáñez-Serrano, J. Kesselmeier, P. I. L. Silveira de Assis, G. Martins, R. de Souza, S. Duvoisin Júnior, A. Guenther, D. Gu, A. Tsokankunku, M. Sörgel, B. Nelson, D. Pinto, S. Komiya, D. M. Rosa, B. Weber, J. Williams, C. Barbosa, M. Robin, K. J. Feeley, A. Duque, V. Londoño Lemos, M. P. Contreras, A. Idarraga, N. López A., C. Husby, and B. Jestrow. Intra- and inter-annual changes in isoprene emission from central Amazonia. ACP – Atmos. Chem. Phys., 23, 8149–8168, 2023.

Honeker, L. K., G. Pugliese, J. Ingrisch, J. Fudyma, J. Gil-Loaiza, E. Carpenter, E. Singer, G. Hildebrand, L. Shi, D. W. Hoyt, J. E. Krechmer, M. Claflin, C. Ayala-Ortiz, V. Freire-Zapata, E. Y. Pfannerstill, L. E. Daber, M. A. Dippold, J. Kreuzwieser, J. Williams, S. N. Ladd, C. Werner, M. M. Tfaily, L. K. Meredith. Drought induces microbially-produced emissions of three volatile central metabolites amid stress responses in an artificial tropical rainforest. Nature, Microbiology – Nature Microbiology 8, 1480–1494 2023.

Krause, T., P. Wiesinger, D. González-Cabanelas, N. Lackus, T. Köllner, T. Kluepfel, J. Williams, J. Rohwer, J. Gershenzon, and A. Schmidt. Isoprenoid biosynthesis in two woody plants is differently regulated by HDR, the last enzyme of the MEP pathway". Plant Physiology, 192, 2, 767–788,, 2023.

Krysztofiak, G., V. Catoire, T. Dudok De Wit, D. E. Kinnison, A. R. Ravishankara, V. Brocchi, E. Atlas, H. Bozem, R. Commane, F. D'Amato, B. Daube, G. S. Diskin, A. Engel, F. Friedl-Vallon, E. Hintsa, D. F. Hurst, P. Hoor, F. Jegou, K. W. Jucks, A. Kleinböhl, H. Küllmann, E. Kort, K. McKain, F. L. Moore, F. Obersteiner, Y. Gonzalez Ramos, T. Schuck, G. C. Toon, S. Viciani, G. Wetzel, J. Williams, S. C. Wofsy. N2O Temporal Variability from the Middle Troposphere to the Middle Stratosphere Based on Airborne and Balloon-Borne Observations during the Period 1987-2018. Atmosphere 2023, 14(3), 585;

Leppla, D., N. Zannoni, L. Kremper, J. Williams, C. Pöhlker, M. Sá, M. Christina Solci, and T. Hoffmann. Varying chiral ratio of pinic acid enantiomers above the Amazon rainforest. Atmos. Chem. Phys., 23, 809–820,, 2023.

Muthalagu, A., H. Niculita-Hirzel, S. Yanga, M. Merizak, M. Pikridas, A. Qureshi, P. Wargocki, G. Bekö, J. Williams, M. Täubel, D. Licina.Comparison of two methods for bioaerosol sampling and characterization in a low-biomass chamber environment. Building and Environment Volume 240,  2023, 110458

Pugliese, G., J. Ingrisch, L. K. Meredith, E. Y. Pfannerstill, T. Klüpfel, K. Meeran, J. Byron, G. Purser, J. Gil-Loaiza, J. van Haren, K. Dontsova, J. Kreuzwieser, S. N. Ladd, C. Werner and J. Williams. Nature Comms. 14, 5064, 2023.

Ringsdorf, A., A. Edtbauer, J. Vilà-Guerau de Arellano, E. Y. Pfannerstill, S. Gromov, V. Kumar, A. Pozzer, S. Wolff, A. Tsokankunku, M. Soergel, M. O. Sá, A. Araújo, F. Ditas, C. Poehlker, J. Lelieveld, J. Williams. Inferring the diurnal variability of OH radical concentrations over the Amazon from BVOC measurements. Nat. Sci. Rep. – In press 2023.

Schallhart, S., A. P. Praplan, T. Tykkä, N. Reijrink, J. Williams, H. Hakola, and H. Hellén. First total OH reactivity emission measurements from a Nordic wetland. Boreal Environment Research 28: 97–110, 2023.

Strada, S., Pozzer, A., Giorgi, F., Giuliani, G., Coppola, E., Solmon, E. Bourtsoukidis, J. Williams, F., Jiang, X., and Guenther, A.: Assessment of isoprene and near surface ozone sensitivities to water stress over the Euro-Mediterranean region, ACP, in press, 2023.



Bougas, L., J. Byron, D. Budker, J. Williams. Absolute optical chiral analysis using cavity-enhanced polarimetry. Science Advances, 8, 22. DOI: 10.1126/sciadv.abm3749

Byron, J., J. Kreuzwieser, G. Purser, J. van Haren, S. N. Ladd, L. K. Meredith, C. Werner and J. Williams. Chiral monoterpenes reveal forest emission mechanisms and drought responses. Nature Nature, 609, pp 307–312 (2022).

Carter, T. S., C. L. Heald, J. H. Kroll, E.C. Apel, D. Blake, M. Coggon, A. Edtbauer, G. Gkatzelis, R.S. Hornbrook, J. Peischl, E.Y. Pfannerstill, F. Piel, N.G. Reijrink, A. Ringsdorf, C. Warneke, J. Williams, A. Wisthaler, and L. Xu: An Improved Representation of Fire Non-Methane Organic Gases (NMOGs) in Models: Emissions to Reactivity, Atmos. Chem. Phys.,, accepted, 2022.

P. Dewald, C. M. Nussbaumer, J. Schuladen, A. Ringsdorf, A. Edtbauer, H. Fischer, J. Williams, J. Lelieveld, and J. N. Crowley. Fate of the nitrate radical at the summit of a semi-rural mountain site in Germany assessed with direct reactivity measurements. Atmos. Chem. Phys., 22, 7051–7069, 2022

Gomes Alves, E., T.C. Taylor, M. Robin, D. Pinheiro de Oliveira, J. Schietti, S. Duvoisin Júnior, N. Zannoni, C. Hartmann, J. Williams, J.F Gonçalves, J. Schöngart, F. Wittmann, M.T.F Piedade: Seasonal shifts in isoprenoid emission compositions from three hyperdominant tree species in central Amazonia in its current form for publication in Plant Biology. doi:10.1111/plb.13419.

Li, M. G. Bekö, N. Zannoni, G. Pugliese, M. Carrito, N. Cera, C. Moura, P. Wargocki, P. Vasconcelos, P. Nobre, N. Wang, L. Ernle, J. Williams. Human metabolic emissions of carbon dioxide and methane and their implications for carbon emissions. Science of the Total Environment. Accepted. 2022.

Osipov, S., S. Chowdhury, J. N. Crowley, I. Tadic, F. Drewnick, S. Borrmann, P. Eger, F. Fachinger, H. Fischer, E. Predybaylo, M. Fnais, H. Harder, M. Pikridas, P. Vouterakos, A. Pozzer, J. Sciare, A. Ukhov, G. L. Stenchikov, J. Williams & J. Lelieveld. Severe atmospheric pollution in the Middle East is attributable to anthropogenic sources. Nature Communications Earth & Environment 3, 203, 2022.

Reifenberg, S. F., A. Martin, M. Kohl, Z. Hamryszczak, I. Tadic, L. Röder, H. Fischer, K. Kaiser, J. Schneider, R. Dörich, J.N. Crowley, L. Tomsche, A. Marsing, C. Voigt, A. Zahn, C. Pöhlker, B. Holanda, O.O. Krüger, U Pöschl, M. Pöhlker, P. Jöckel, M. Dorf, U. Schumann, J. Williams, J. Curtius, H. Harder, H. Schlager, J. Lelieveld, and A. Pozzer: Impact of reduced emissions on direct and indirect aerosol radiative forcing during COVID–19 lockdown in Europe, Atmos. Chem. Phys. Discuss. [preprint],, 2022.

Sakamotoa, M., M. Li, K. Kuga, K. Ito, G. Bekö, J. Williams, P. Wargocki. CO2 emission rates from sedentary subjects under controlled laboratory conditions. Building and Environment, 211, 2022, 108735

Sheu, R., T. Hass-Mitchell, A. Ringsdorf, T. Berkemeier, JoMachesky, A. Edtbauer, T. Klüpfel, A. Filippi, Benjamin A.Musa Bandowe, M. Wietzoreck, P. Kukučkac, H.Tong, G. Lammel, U.Pöschl, J.Williams, D. R.Gentner. Deposited particles and human lung lining fluid are dynamic, chemically-complex reservoirs leading to thirdhand smoke emissions and exposure. Environ. Sci.: Atmos., 2022.

Voigt, C., J. Lelieveld, H. Schlager, J. Schneider, J. Curtius, R. Meerkötter, D. Sauer, L. Bugliaro, B. Bohn, J.N. Crowley, T. Erbertseder, S. Groβ, V. Hahn, Q. Li, M. Mertens, M. Pöhlker, A. Pozzer, U. Schumann, L. Tomsche, J. Williams, A. Zahn, A. Andreae, S. Borrmann, T. Bräuer, R. Dörich, A. Dörnbrack, A. Edtbauer, L. Ernle, H. Fischer, A. Giez, M. Granzin, V. Grewe, H. Harder, M. Heinritzi, B.A. Holanda, P. Jöckel, K. Kaiser, O.O. Krüger, J. Lucke, A. Marsing, A. Martin, S. Matthes, C. Pöhlker, U. Pöschl, S. Reifenberg, A. Ringsdorf, M. Scheibe, I. Tadic, M. Zauner-Wieczorek, R., Henke, & M. Rapp. (2022). Cleaner skies during the COVID-19 lockdown, Bulletin of the American Meteorological Society, (published online ahead of print 2022). Retrieved Apr 8, 2022, from

Wang, N. G. Pugliese, M. Carrito, C. Moura, P. Vasconcelos, N. Cera, M. Li, P. Nobre, J.R. Georgiadis, J.K. Schubert, J. Williams. Breath chemical markers of sexual arousal in humans. Nature Scientific Reports 12, 6267 (2022)

Wang, N., L. Ernle, G. Bekö, P. Wargocki, and J. Williams. Emission Rates of Volatile Organic Compounds from Humans. Environ. Sci &Tech. 2022. 56, 8, 4838–4848

Zannoni, N., P. S. J. Lakey, Y. Won, M. Shiraiwa, D. Rim, C. J. Weschler, N. Wang, L. Ernle, M. Li, G. Bekö, P. Wargocki, J. Williams. The Human Oxidation Field. Science 377, 6610 pp. 1071-1077. (2022).

Zhao, Y., D. Booge, C. A. Marandino, C. Schlundt, A. Bracher, E.L. Atlas, J. Williams, and H.W. Bange. : Dimethylated sulfur compounds in the Peruvian upwelling system, Biogeosciences, 19, 701–714,, 2022.




Edtbauer, A. E. Y. Pfannerstill, A. P. Pires Florentino, C. G. G. Barbosa, E. Rodriguez-Caballero, N. Zannoni, R. P. Alves, S. Wolff, A. Tsokankunku, A. Aptroot, M. de Oliveira Sá, A. C. de Araújo, M. Sörgel, S. M. de Oliveira, B. Weber, and J. Williams. Bryophytes and lichens in the Amazon rainforest, a significant new source and sink of BVOCs. Nature Communications Earth & Environment volume 2, Article number: 258 .2021.

Eger, P. G., Vereecken, L., Sander, R., Schuladen, J., Sobanski, N., Fischer, H., Karu, E., Williams, J., Vakkari, V., Petäjä, T., Lelieveld, J., Pozzer, A., and Crowley, J. N.: Impact of pyruvic acid photolysis on acetaldehyde and peroxy radical formation in the boreal forest: theoretical calculations and model results, Atmos. Chem. Phys., 21, 14333–14349,, 2021.

Friedrich, N., P. Eger, J. Shenolikar, N. Sobanski, J. Schuladen, D. Dienhart, B. Hottmann, I. Tadic, H. Fischer, M. Martinez, R. Rohloff, S. Tauer, H. Harder, E.Y. Pfannerstill, N. Wang, J. Williams, J. Brooks, F. Drewnick, H. Su, G. Li, Y. Cheng, J. Lelieveld & J.N. Crowley: Reactive nitrogen around the Arabian Peninsula and in the Mediterranean Sea during the 2017 AQABA ship campaign. Atmos. Chem. Phys., 21, 7473–7498,, 2021.

Goldstein, A.H., W.W. Nazaroff, C.J. Weschler & J. Williams: How do indoor environments affect air pollution exposure? Environ. Sci. Technol., 55(1), 100-108, 2021.

Karu, E., M. Li, L. Ernle, C.A.M. Brenninkmeijer, J. Lelieveld & J. Williams: Atomic emission detector with gas chromatographic separation and cryogenic pre-concentration (CryoTrap-GC-AED) for atmospheric trace gas measurements. Atmos. Meas. Tech., 14, 1817–1831,, 2021.

Paris, J.-D., Riandet, A., Bourtsoukidis, E., Delmotte, M., Berchet, A., Williams, J., Ernle, L., Tadic, I., Harder, H., and Lelieveld, J.: Shipborne measurements of methane and carbon dioxide in the Middle East and Mediterranean areas and the contribution from oil and gas emissions, Atmos. Chem. Phys., 21, 12443–12462,, 2021.

Pfannerstill, E.: Total OH reactivity over the Amazon rainforest: variability with temperature, wind, rain, altitude, time of day, season, and an overall budget closure. Atmos. Chem. Phys., 21, 6231–6256,, 2021.

Pfannerstill, E., N. G. Reijrink, A. Edtbauer, A. Ringsdorf, N. Zannoni, A. Araújo, F. Ditas, B. A. Holanda, M. O. Sá, A. Tsokankunku, D. Walter, S. Wolff, J. V. Lavrič, C. Pöhlker, M. Sörgel, J. Williams : Total OH reactivity over the Amazon rainforest: variability with temperature, wind, rain, altitude, time of day, season, and an overall budget closure. Atmos. Chem. Phys., 21, 6231–6256,, 2021.

Rocco, M., E. Dunne, M. Peltola, N. Barr, J. Williams, A. Colomb, K. Safi, A. Saint-Macary, A. Marriner, S. Deppeler, J. Harnwell, C. Law & K. Sellegri: Oceanic phytoplankton are a potentially important source of benzenoids to the remote marine atmosphere Nature Communications Earth & Environment 2, 175,, 2021.

Wang, N., N. Zannoni, L. Ernle, G. Beko, P. Wargocki, M. Li, C.J. Weschler & J. Williams: Total OH reactivity of emissions from humans: in situ measurements and budget Analysis. Environ. Sci. Technol., 55(1), 149-159,, 2021.

Weber, J. S. Archer-Nicholls, N. L. Abraham, Y. M. Shin, T. J. Bannan, C. J. Percival, A. Bacak, P. Artaxo, M. Jenkin, M. A. H. Khan, D. E. Shallcross, R. H. Schwantes, J. Williams, and Alex T. Archibald: Improvements to the representation of BVOC chemistry–climate interactions in UKCA (v11.5) with the CRI-Strat 2 mechanism: incorporation and evaluation. Geosci. Model Dev., 14, 5239–5268,

Werner, C.,  L. K. Meredith, S. N. Ladd, J. Ingrisch, A. Kübert, J. van Haren, M. Bahn, K. Bailey, I. Bamberger, M. Beyer, D. Blomdahl, J. Byron, E. Daber, J. Deleeuw, M. Dippold, J. Fudyma, J. Gil-Loaiza, L. K. Honeker, J. Hu, J. Huang, T. Klüpfel, J. Krechmer, J. Kreuzwieser, K. Kühnhammer, M. M. Lehmann, K. Meeran, P. K. Misztal, W. Ng, E.Pfannerstill, G. Pugliese, G. Purser, J. Roscioli, L. Shi, M. Tfaily, Jonathan Williams. Ecosystem fluxes during drought and recovery in an experimental forest, Science, 374, 6574, 1514-1518, DOI: 10.1126/science.abj6789, 2021.

Wikelski, M., M. Quetting, Y. Cheng, W. Fiedler, A. Flack, A. Gagliardo, R. Salas, N. Zannoni & J. Williams: Smell of green leaf volatiles attracts White storks to freshly cut meadows. Sci Rep, 11, 12912,, 2021.

Yang, S., G. Bekö, P. Wargocki, J. Willimas & D. Licina: Human emissions of size-resoved fluorescent aerosol particles: influence of personal and environmental factors. Environ. Sci. Technol., 55(1), 507-518, 2021.

Yang, S., D. Licina, C. J. Weschler, N. Wang, N. Zannoni, M. Li, J. Vanhanen, S. Langer, P. Wargocki, J. Williams, and G. Bekö: Ozone Initiates Human-Derived Emission of Nanocluster Aerosols. Environ. Sci. Technol. , 55, 14536−14545, 2021.

E. Bourtsoukidis, A. Pozzer, T. Sattler, V. Matthaios, L. Ernle, A. Edtbauer, H. Fischer, T. Könemann, S. Osipov, J.D. Paris, E. Pfannerstill, C. Stönner, I. Tadic, D. Walter, N. Wang, J. Lelieveld, and J. Williams. The Red Sea Deep Water is a potent source of atmospheric ethane and propane". Nature Communications volume 11, Article number: 447 (2020).

R. Sheu, C. Stönner, J.C. Ditto, T. Klüpfel, J. Williams, D.R. Gentner. Human transport of third hand tobacco smoke: A prominent source of hazardous air pollutants into indoor non-smoking environments. Science Advances, Vol. 6, no. 10, eaay4109 DOI: 10.1126/sciadv.aay4109, 2020.

M. Berasategui, D. Amedro, A. Edtbauer, J. Williams, J. Lelieveld, and J.N. Crowley. Kinetic and mechanistic study of the reaction between methane sulphonamide (CH3S(O)2NH2) and OH, Atmos. Chem. Phys. Discuss.,, in review, 2019.

A. Edtbauer, C. Stönner, E.Y. Pfannerstill, M. Berasategui, D. Walter, J.N. Crowley, J. Lelieveld, and J. Williams. A new marine biogenic emission: methane sulfonamide (MSAM), DMS and DMSO2 measured in air over the Arabian Sea, Atmos. Chem. Phys., 20, 6081–6094,, 2020.

P.G. Eger, J. Schuladen, N. Sobanski, H. Fischer, E. Karu, J. Williams, M. Riva, Q. Zha, M. Ehn, L.L.J. Quéléver, S. Schallhart, J. Lelieveld, and J.N. Crowley. Pyruvic acid in the boreal forest: first measurements and impact on radical chemistry, Atmos. Chem. Phys., 20, 3697–3711,, 2020.

J. Williams and A. Ringsdorf, Human odour thresholds are tuned to atmospheric chemical lifetimes. Research Article – Phil. Trans. R. Soc. B 375: 20190274.

T. J. Schuck, A.-K. Blank, E. Rittmeier, J. Williams, C.A.M. Brenninkmeijer, A. Engel, and A. Zahn. Stability of Halocarbons in Whole Air Samples from the Upper Troposphere and Lowermost Stratosphere, Atmos. Meas. Tech., 13, 73–84, 2020

A.M. Yáñez‐Serrano E. Bourtsoukidis E.G. Alves M. Bauwens T. Stavrakou J. Llusia I. Filella A. Guenther J. Williams P. Artaxo K. Sindelarova J. Doubalova J. Kesselmeier J. Peñuelas. Amazonian Biogenic Volatile Organic Compounds under Global Change. Global Change Biology. published:23 May 2020

M. Li, C. J. Weschler, G. Bekö, P. Wargocki, G. Lucic, and J. Williams. Human Ammonia Emission Rates under Various Indoor Environmental Conditions. Environmental Science & Technology 2020 54 (9), 5419-5428. DOI: 10.1021/acs.est.0c00094

N. Wang, A. Edtbauer, C. Stönner, A. Pozzer, E. Bourtsoukidis, L. Ernle, D. Dienhart, B. Hottmann, H. Fischer, J. Schuladen, J.N. Crowley, J.-D. Paris, J. Lelieveld, and J. Williams. Measurements of carbonyl compounds around the Arabian Peninsula indicate large missing sources of acetaldehyde, Atmos. Chem. Phys., 20, 10807–10829, 2020.

N. Zannoni, D. Leppla, P.I. Lembo, T. Hoffmann, M. Sa, A. Araujo, J. Williams. Surprising chiral composition changes over the Amazon rainforest with height, time and season Nature Communications Earth & Environment, 1, 4, 2020.

N. Zannoni, M. Wikelski, A. Gagliardo, A. Raz, S. Kramer, C. Seghetti, N. Wang, A. Edtbauer, and J. Williams. Identifying volatile organic compounds used for olfactory navigation by homing pigeons. Nature Scientific Reports, 10, Article number: 15879.

E. Pfannerstill Total OH reactivity over the Amazon rainforest: variability with temperature, wind, rain, altitude, time of day, season, and an overall budget closure, ACPD, in review.
G. Bekö, P. Wargocki , N. Wang, M. Li, C.J. Weschler, G. Morrison, S. Langer, L. Ernle, D. Licina, S. Yang, N. Zannoni, J. Williams. The Indoor Chemical Human Emissions and Reactivity (ICHEAR) project: Overview of experimental methodology and preliminary results. Indoor Air 2020 doi: 10.1111/ina.12687.

A.M. Yáñez‐Serrano, I. Filella, J. LLusi, A. Gargallo-Garriga, V. Granda, E. Bourtsoukidis, J. Williams, R. Seco, L. Cappellin, C. Werner, J. de Gouw, J. Peñuelas. GLOVOCS - Master compound assignment guide for proton transfer reaction mass spectrometry users. Atmospheric Environment 244 (2020) 117929.

P. G. Eger, J. Schuladen, N. Sobanski, H. Fischer, E. Karu, J. Williams, V. Vakkari, J. Lelieveld, and J. N. Crowley. Modelling the impact of gas-phase pyruvic acid on acetaldehyde and peroxy radical formation in the boreal forest. ACPD in review.

C. Arata, N. Heine, N. Wang, P. K. Misztal, P. Wargocki, G. Bekö, J. Williams, W.W. Nazaroff, K. R. Wilson. A. H. Goldstein. Heterogeneous Ozonolysis of Squalene: Gas-Phase Products Depend on Water Vapor Concentration. Environ. Sci. Technol. 2019, 53, 24, 14441-14448.

J. Liebmann, N. Sobanski, J. Schuladen, E. Karu, H. Hellén, H. Hakola, Q. Zha, M. Ehn, M. Riva, J. Williams, H. Fischer, J. Lelieveld, and J.N. Crowley. Alkyl nitrates in the boreal forest: Formation via the NO3, OH and O3 induced oxidation of BVOCs and ambient lifetimes, Atmos. Chem. Phys., 19, 10391–10403, 2019.

E.Y. Pfannerstill, N. Wang, A. Edtbauer, E. Bourtsoukidis, J.N Crowley, D. Dienhart, P.G. Eger, L. Ernle, H. Fischer, B. Hottmann, J.-D. Paris, C. Stönner, I. Tadic, D. Walter, J. Lelieveld, and J. Williams. Shipborne measurements of total OH reactivity around the Arabian Peninsula and its role in ozone chemistry, Atmos. Chem. Phys., 19, 11501–11523, 2019.

Dlugi, R., Berger, M., Mallik, C., Tsokankunku, A., Zelger, M., Acevedo, O. C., Bourtsoukidis, E., Hofzumahaus, A., Kesselmeier, J., Kramm, G., Marno, D., Martinez, M., Nölscher, A. C., Ouwersloot, H., Pfannerstill, E. Y., Rohrer, F., Tauer, S., Williams, J., Yáñez-Serrano, A.-M., Andreae, M. O., Harder, H., and Sörgel, M.: Segregation in the Atmospheric Boundary Layer: The Case of OH – Isoprene, Atmos. Chem. Phys. Discuss.,, in review, 2019.

E. Bourtsoukidis, L. Ernle, J.N. Crowley, J. Lelieveld, J.-D. Paris, A. Pozzer, D. Walter, and J. Williams. Non-methane hydrocarbon (C2–C8) sources and sinks around the Arabian Peninsula, Atmos. Chem. Phys., 19, 7209-7232,, 2019.

A. M. Yáñez-Serrano, L. Mahlau, L. Fasbender, J. Byron, J. Williams, J. Kreuzwieser, C. Werner. Heat stress causes enhanced use of cytosolic pyruvate for isoprene biosynthesis. Journal of Experimental Botany, 70, 20, 2019, Pages 5827–5838,

T. Sattler, M. Sörgel, J. Wittmer, E. Bourtsoukidis, T. Krause, E. Atlas, S. Benk, S. Bleicher, K. Kamilli, J. Ofner, R. Kopetzky, A. Held, W.-U. Palm, J. Williams, C. Zetzsch. and H.-F. Schöler. Natural Formation of Chloro- and Bromoacetone in Salt Lakes of Western Australia. Atmosphere 2019, 10(11), 663;

G. Li, Y. Cheng, U. Kuhn, R. Xu, Y. Yang, H. Meusel, N. Ma, Y. Wu, M. Li, J. Williams, T. Hoffmann, M. Ammann, U. Pöschl, M. Shao, and H. Su. Physicochemical uptake and release of volatile organic compounds by soil in coated-wall flow tube experiments with ambient air, Atmos. Chem. Phys., 19, 2209–2232, 2019.

M. Ermel, T. Behrendt, R. Oswald, B. Derstroff, D. Wu, S. Hohlmann, C. Stönner, A. Pommerening-Röser, M. Könneke, J. Williams, F. Meixner, M. Andreae, I. Trebs, and M. Soergel. Hydroxylamine released by nitrifying microorganisms is a precursor for HONO emission from drying soils. Nature Scientific Reports, 8, 1877 (2018) doi:10.1038/s41598-018-20170-1

Liebmann, J., Karu, E., Sobanski, N., Schuladen, J., Ehn, M., Schallhart, S., Quéléver, L., Hellen, H., Hakola, H., Hoffmann, T., Williams, J., Fischer, H., Lelieveld, J., and Crowley, J. N.: Direct measurement of NO3 radical reactivity in a boreal forest, Atmos. Chem. Phys., 18, 3799-3815,, 2018.

Yañez-Serrano, A. M., Nölscher, A. C., Bourtsoukidis, E., Gomes Alves, E., Ganzeveld, L., Bonn, B., Wolff, S., Sa, M., Yamasoe, M., Williams, J., Andreae, M. O., and Kesselmeier, J.: Monoterpene chemical speciation in the Amazon tropical rainforest: variation with season, height, and time of day at the Amazon Tall Tower Observatory (ATTO), Atmos. Chem. Phys.,, 2018.

E. Bourtsoukidis, T. Behrendt, A. M. Yañez-Serrano, H. Hellén, E. Diamantopoulos, E. Catão, K. Ashworth, A. Pozzer, C. A. Quesada, D. L. Martins, M. Sá, A. Araujo, J. Brito, P. Artaxo, J. Kesselmeier, J. Lelieveld & J. Williams. Strong sesquiterpene emissions from Amazonian soils. Nature Communications, 9, Article number: 2226, 2018.

J. Lelieveld, E. Bourtsoukidis, C. Brühl, H. Fischer, H. Fuchs, H. Harder, A. Hofzumahaus, F. Holland, D. Marno, M. Neumaier, A. Pozzer, H. Schlager, J. Williams, A. Zahn, H. Ziereis, The South Asian monsoon—Pollution pump and purifier, Science, 14 Jun 2018: eaar2501, DOI: 10.1126/science.aar2501, 2018.

C. Mallik, L. Tomsche, E. Bourtsoukidis, J.N. Crowley, B. Derstroff, H. Fischer, S. Hafermann, I. Hueser, U. Javed, S. Kessel, J. Lelieveld, M. Martinez, H. Meusel, A. Novelli, G. J. Phillips, A. Pozzer, A. Reiffs, R. Sander, C. Sauvage, J. Schuladen, H. Su, J. Williams and H. Harder. Oxidation processes in the Eastern Mediterranean atmosphere: Evidence from the Modelling of HOx Measurements over Cyprus. Atmos. Chem. & Phys. 18, 10825-10847,, 2018.

M. Li, E. Karu, C. Brenninkmeijer, H. Fischer, J. Lelieveld & J. Williams. Tropospheric OH and stratospheric OH and Cl concentrations determined from CH4, CH3Cl, and SF6 measurements. NPJ Climate and Atmospheric Science, 1, 29 (2018)

C. Stönner, A. Edtbauer, B. Derstroff, E. Bourtsoukidis, T. Klüpfel, J. Wicker, J. Williams. Can the age classification of films be made based on audience breath-chemical emissions?PLOS, 2018.

J. N. Crowley, N. Pouvesle, G. J. Phillips, R. Axinte, H. Fischer, T. Petäjä, A. Nölscher, J. Williams, K. Hens, H. Harder, M. Martinez-Harder, A. Novelli, D. Kubistin, B. Bohn, and J. Lelieveld. Insights into HOx and ROx chemistry in the boreal forest via measurement of peroxyacetic acid, peroxyacetic nitric anhydride (PAN) and hydrogen peroxide. Atmos. Chem. Phys., 18, 13457-13479, 2018.

M. Staudt, J. Byron, K. Piquemal, J. Williams. Compartment specific chiral pinene emissions identified in a Maritime pine forest. Science of The Total Environment.

11.146.Li, G., Cheng, Y., Kuhn, U., Xu, R., Yang, Y., Meusel, H., Ma, N., Wu, Y., Li, M., Williams, J., Hoffmann, T., Ammann, M., Pöschl, U., Shao, M., and Su, H.: Physicochemical uptake and release of volatile organic compounds by soil in coated-wall flow tube experiments with ambient air, Atmos. Chem. Phys. Discuss.,, in review, 2018.

J. Ditas, N. Ma, Y. Zhang, D. Assmann, M. Neumaier, H. Riede, E. Karu, J. Williams, D. Scharffe, Q. Wang, J. Saturno, J. P. Schwarz, J. M. Katich, G. McMeeking, A. Zahn, M. Hermann, C. A. M. Brenninkmeijer, M. O. Andreae, U. Pöschl, H. Su and Y. Cheng. Strong impact of wildfires on the abundance and aging of black carbon in the lowermost stratospherePNAS, doi/10.1073/pnas.1806868115.

Y. Pfannerstill, A. C. Nölscher, A. M. Yáñez-Serrano, E. Bourtsoukidis, S. Keßel, R. H. H. Janssen, A. Tsokankunku, S. Wolff, M. Sörgel, M. O. Sá, A. Araújo, D. Walter, J. V. Lavrič, C. Quaresma Dias-Júnior, J. Kesselmeier, J. Williams. Total OH reactivity changes over the Amazon rainforest during an El Nino event. Frontiers in Forests and Global Change, section Forests and the Atmosphere, Front. For. Glob. Change, 18 December 2018 |

M. Staudt, I. Bourgeoisa, R. Al Halabia, W. Song, J. Williams. New insights into the parametrization of temperature and light responses of mono - and sesquiterpene emissions from Aleppo pine and rosemary. Atmospheric Environment, Volume 152, March 2017, Pages 212–221

N. Sobanski, J. Thieser, J. Schuladen, C. Sauvage, W. Song, J. Williams, J. Lelieveld, and J. N. Crowley. Day and night-time formation of organic nitrates at a forested mountain site in south west Germany. 17, 4115-4130, doi:10.5194/acp-17-4115-2017, 2017.

U. R. Thorenz, A. K. Baker, E. C. Leedham Elvidge, C. Sauvage, H. Riede, P. F. J. van Velthoven, M. Hermann, A. Weigelt, D. E. Oram, C. A. M. Brenninkmeijer, A. Zahn, and J. Williams. Investigating African trace gas sources, vertical transport, and oxidation using IAGOS-CARIBIC measurements between Germany and South Africa between 2009 and 2011. Atmospheric Environment. 158, 11-26, 2017.

Keßel, S., Cabrera-Perez, D., Horowitz, A., Veres, P. R., Sander, R., Taraborrelli, D., Tucceri, M., Crowley, J., Pozzer, A., Vereecken, L., Lelieveld, J., and Williams, J.: Atmospheric Chemistry, Sources, and Sinks of Carbon Suboxide, C3O2, Atmos. Chem. Phys. Atmos. Chem. Phys., 17, 8789–8804, 2017.

Novelli, A., Hens, K., Tatum Ernest, C., Martinez, M., Nölscher, A. C., Sinha, V., Paasonen, P., Petäjä, T., Sipilä, M., Elste, T., Plass-Dülmer, C., Phillips, G. J., Kubistin, D., Williams, J., Vereecken, L., Lelieveld, J., and Harder, H.: Identifying Criegee intermediates as potential oxidants in the troposphere, Atmos. Chem. Phys., 17, 7807–7826, 2017.

Bozem, H., Pozzer, A., Harder, H., Martinez, M., Williams, J., Lelieveld, J., and Fischer, H.: The influence of deep convection on HCHO and H2O2 in the upper troposphere over Europe, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2017-154, in review, 2017.

Derstroff, B., Hüser, I., Sander, R., Bourtsoukidis, E., Crowley, J. N., Fischer, H., Gromov, S., Harder, H., Kesselmeier, J., Lelieveld, J., Mallik, C., Martinez, M., Novelli, A., Parchatka, U., Phillips, G. J., Sauvage, C., Schuladen, J., Stönner, C., Tomsche, L., and Williams, J.: Volatile organic compounds (VOCs) in photochemically aged air from the Eastern and Western Mediterranean, Atmos. Chem. Phys., 17, 9547–9566, 2017.

Yang, Y., Shao, M., Keßel, S., Li, Y., Lu, K., Lu, S., Williams, J., Zhang, Y., Zeng, L., Nölscher, A. C., Wu, Y., Wang, X., and Zheng, J.: How the OH reactivity affects the ozone production efficiency: case studies in Beijing and Heshan, China, Atmos. Chem. Phys., 17, 7127-7142,, 2017.

B.T. Jobson, B. Derstroff, A. Edtbauer, G. VanderSchelden, J. Williams. Urban Air Chemistry and Diesel Vehicles Emissions: Quantifying Small and Big Hydrocarbons by CIMS to Improve Emission Inventories. Atmospheric Environment New Directions:, 2017.

Christof Stönner, Achim Edtbauer, Jonathan Williams. Real world volatile organic compound emission rates from seated adults and children for use in indoor air studies. Indoor Air, DOI: 10.1111/ina.12405, 2017.

Fuchs, H., Novelli, A., Rolletter, M., Hofzumahaus, A., Pfannerstill, E. Y., Kessel, S., Edtbauer, A., Williams, J., Michoud, V., Dusanter, S., Locoge, N., Zannoni, N., Gros, V., Truong, F., Sarda-Esteve, R., Cryer, D. R., Brumby, C. A., Whalley, L. K., Stone, D., Seakins, P. W., Heard, D. E., Schoemaecker, C., Blocquet, M., Coudert, S., Batut, S., Fittschen, C., Thames, A. B., Brune, W. H., Ernest, C., Harder, H., Muller, J. B. A., Elste, T., Kubistin, D., Andres, S., Bohn, B., Hohaus, T., Holland, F., Li, X., Rohrer, F., Kiendler-Scharr, A., Tillmann, R., Wegener, R., Yu, Z., Zou, Q., and Wahner, A.: Comparison of OH reactivity measurements in the atmospheric simulation chamber SAPHIR, Atmos. Meas. Tech. Discuss.,, in review, 2017.

Bourtsoukidis, E., Helleis, F., Tomsche, L., Fischer, H., Hofmann, R., Lelieveld, J., and Williams, J.: An aircraft gas chromatograph-mass spectrometer System for Organic Fast Identification Analysis (SOFIA): design, performance and a case study of Asian monsoon pollution outflow, Atmos. Meas. Tech. Discuss.,, in review, 2017.

J. Williams, Christof Stönner, Jörg Wicker, Nicolas Krauter, Bettina Derstroff, Efstratios Bourtsoukidis, Thomas Klüpfel, Stefan Kramer. Cinema audiences reproducibly vary the chemical composition of air during films, by broadcasting scene specific emissions on breath. Nature Scientific Reports 6:25464,DOI: 10.1038/srep25464

J. Williams, S. U. Keßel, A. C. Nölscher, Y- Yang, Y. Lee, A. M. Yáñez-Serrano, S. Wolff, J. Kesselmeier, T. Klüpfel, J. Lelieveld, Min Shao. Opposite OH reactivity and ozone cycles in the Amazon rainforest and megacity Beijing: Subversion of biospheric oxidant control by anthropogenic emissions. Atmos. Environ. Volume 125, Part A, January 2016, Pages 112–118

A.C. Nölscher, A.M. Yañez-Serrano, S. Wolff, A.C. de Araujo, J.V. Lavrič, J. Kesselmeier, J. Williams Unexpected seasonality in quantity and composition of Amazon rainforest air reactivity. Nature Communications. 2016 Jan 22;7:10383. doi: 10.1038/ncomms10383.

H. Wang, J. Zeuschner, M. Eremets, I. Troyan and J. Williams. Stable solid and aqueous H2CO3 from CO2 and H2O at high pressure and high temperature. Scientific Reports 6, Article number: 19902 (2016) doi:10.1038/srep19902.

N. Sobanski, M.J. Tang, J. Thieser, G. Schuster, D. Pöhler, H. Fischer, W. Song, C. Sauvage, J. Williams, J. Fachinger, F. Berkes, P. Hoor, U. Platt, J. Lelieveld and J.N. Crowley. Chemical and meteorological influences on the lifetime of NO3 at a semi-rural mountain site during “PARADE”Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2016-38, 2016.

Zörner, J., Penning de Vries, M. J. M., Beirle, S., Sihler, H., Veres, P. R., Williams, J., and Wagner, T.: Multi-satellite sensor study on precipitation-induced emission pulses of NOx from soils in semi-arid ecosystems, Atmos. Chem. Phys. Discuss., doi:10.5194/acp-2016-93, in review, 2016.

Yudong Yang, Min Shao, Xuemei Wang, Anke C. Nölscher, Stephan Kessel, Alex Guenther, Jonathan Williams. Towards a quantitative understanding of total OH reactivity: A review. Atmospheric Environment. Volume 134, June 2016, 147–161.

Jonathan Williams and Joachim Pleil. Perspective: Crowd-based Breath Analysis: Assessing Behavior, Activity, Exposures, and Emotional Response of People in Groups. Journal of Breath Research.

J. Williams and W. Brune. A roadmap for OH reactivity research, Atmospheric Environment (2015),

E. Mesarchaki, C. Kräuter. K.E. Krall, M. Bopp, F. Helleis, J. Williams, and B. Jähne. Measuring air-sea gas exchange velocities in a large scale annular wind-wave tank. Ocean Sci., 11, 121–138, 2015, doi:10.5194/os-11-121-2015.

R. Oswald, M. Ermel, K. Hens, A. Novelli, H.G. Ouwersloot, P. Paasonen, T. Petäjä, M. Sipilä, P. Keronen, J. Bäck, R. Königstedt, Z. Hosaynali Beygi, H. Fischer, B. Bohn, D. Kubistin, H. Harder, M. Martinez, J. Williams, T. Hoffmann, I. Trebs, and M. Sörgel MS. Comparison of HONO budgets for two measurement heights at a field station within the Boreal Forest (SMEAR II – HUMPPA-COPEC-2010). Atmos. Chem. Phys., 15, 799-813, 2015.

C.E. Stockwell, P. R. Veres, J. Williams, and R. J. Yokelson MS. Characterization of biomass burning smoke from cooking fires, peat, crop residue, and other fuels with high resolution proton-transfer-reaction time-of-flight mass spectrometry. Atmos. Chem. Phys., 15, 845–865, 2015

A.M. Yañez-Serrano, A. C. Nölscher, J. Williams, S. Wolff, E. Alves, G. A. Martins, E. Bourtsoukidis, J. Brito, K. Jardine, P. Artaxo, and J. Kesselmeier. Diel and seasonal changes of Biogenic Volatile Organic Compounds within and above an Amazonian rainforest site. Atmos. Chem. Phys. Discuss., 14, 29159-29208, 2014.

K. Jardine, A. M. Yañez-Serrano, J. Williams, N. Kunert, A. Jardine, T. Taylor, L. Abrell, P. Artaxo, A. Guenther, C. N. Hewitt, E. House, A. P. Florentino, A. Manzi, N. Higuchi, J. Kesselmeier, T. Behrendt, P. R. Veres, B. Derstroff, J. D. Fuentes, S. T. Martin, and M. O. Andreae. Dimethyl sulfide in the Amazon rain forest. Global Biogeochem. Cycles, 29, doi:10.1002/2014GB004969, 2015.

T. Behrendt, P. R. Veres, F. Ashuri, G. Song, M. Flanz, B. Mamtimin, M. Bruse, J. Williams, and F. X. Meixner. Characterisation of NO production and consumption: new insights by an improved laboratory dynamic chamber technique. Biogeosciences Discuss., 11, 1187-1275, 2014.

W. Song, M. Staudt, I. Bourgeois, and J. Williams. Laboratory and field measurements of enantiomeric monoterpene emissions as a function of chemotype, light and temperature. Biogeosciences, 11, 1435-1447, 2014

P. S. Liss, C.A. Marandino, E. E. Dahl, D. Helmig, E. J. Hintsa, C. Hughes, M. T. Johnson, R. M. Moore , J. M. C. Plane, B. Quack, H. B. Singh, J. Stefels, R. von Glasow and J. Williams. Chapter 1, Short-Lived Trace Gases in the Surface Ocean and the Atmosphere. In “Ocean-Atmosphere Interactions of Gases and Particles” Editors Liss and Johnson, 2014. Springer Earth System Sciences. 10.1007/978-3-642-25643-1_1.

J. A. Adame, M. Martínez, M. Sorribas, P. J. Hidalgo, H. Harder, J.-M. Diesch, F. Drewnick, W. Song, J. Williams, V. Sinha, M. A. Hernández-Ceballos, J. Vilà-Guerau de Arellano, R. Sander, Z. Hosaynali-Beygi, H. Fischer, J. Lelieveld, and B. De la Morena. Meteorology during the DOMINO campaign and its connection with trace gases and aerosols. Atmos. Chem. Phys., 14, 2325-2342, 2014

H. Bozem, H. Fischer, C. Gurk, C. L. Schiller, U. Parchatka, R. Koenigstedt, A. Stickler, M. Martinez, H. Harder, D. Kubistin, J. Williams, G. Eerdekens, and J. Lelieveld. Influence of cold corona discharge on the ozone budget in the tropical free troposphere: A case study of deep convection during GABRIEL. Atmos. Chem. Phys., 14, 8917-8931, 2014.

A. C. Nölscher, T. Butler, J. Auld, P. Veres, A. Munoz, D. Taraborrelli, L. Vereecken, J. Lelieveld, J. Williams. Using total OH reactivity to assess isoprene photooxidation via measurement and model Atmospheric Environment. Volume 89, Pages 453–463, June 2014.

E. Mesarchaki, N. Yassaa, D. Hein, H. Lutterbeck, C. Zindler and J. Williams. A novel method for the measurement of VOCs in seawater using needle traps devices and GC-MS Marine Chemistry, 159 . pp. 1-8. DOI: 10.1016/j.marchem.2013.12.001, 2014.

R. Oswald, M. Ermel, K. Hens, A. Novelli, H.G. Ouwersloot, P. Paasonen, T. Petäjä, M. Sipilä, P. Keronen, J. Bäck, R. Königstedt, Z. Hosaynali Beygi, H. Fischer, B. Bohn, D. Kubistin, H. Harder, M. Martinez, J. Williams, T. Hoffmann, I. Trebs, and M. Sörgel MS. Comparison of HONO budgets for two measurement heights at a field station within the Boreal Forest (SMEAR II – HUMPPA-COPEC-2010). ACPD Atmos. Chem. Phys. Discuss., 14, 7823-7857, 2014.

E. Bourtsoukidis, J. Williams, J. Kesselmeier, S. Jacobi, and B. Bonn. From emissions to ambient mixing ratios: on-line seasonal field measurements of volatile organic compounds over a Norway spruce dominated forest in central Germany. Atmos. Chem. Phys., 14, 6495-6510, 2014.

E. Mesarchaki, C. Kräuter. K.E. Krall, M. Bopp, F. Helleis, J. Williams, and B. Jähne. Measuring air-sea gas exchange velocities in a large scale annular wind-wave tank. Ocean Sci. Discuss., 11, 1643-1689, 2014.

P. Veres, T. Behrendt, A. Klapthor, F. X. Meixner, and J. Williams
Volatile Organic Compound Emissions from Soil: Using Proton-Transfer-Reaction Time-of-Flight Mass Spectrometry (PTR-TOF-MS) for the Real Time Observation of Microbial Processes. Biogeosciences Discuss., 11, 12009-12038, 2014

C. E. Stockwell, P. R. Veres, J. Williams, and R. J. Yokelson MS. Characterization of biomass burning smoke from cooking fires, peat, crop residue, and other fuels with high resolution proton-transfer-reaction time-of-flight mass spectrometry. Atmos. Chem. Phys. Discuss., 14, 22163-22216, 2014

J. Williams and P.J. Crutzen. Perspective on the Planet in the Anthropocene. Environmental Chemistry, In Press 2013.

P. R. Veres, P. Faber, F. Drewnick, J. Lelieveld, J. Williams. Volatile Organic Compound Measurements During a Football Match: Assessing Human Emissions in the Atmosphere. Atmospheric Environment, 77, 1052-1059, DOI: 10.1016/j.atmosenv.2013.05.076.

P. Faber, F. Drewnick, P. R. Veres, J. Williams, S. Borrmann. Anthropogenic sources of aerosol particles in a football stadium: Real-time characterization of emissions from cigarette smoking, cooking, hand flares, and color smoke bombs by high-resolution aerosol mass spectrometry. Atmospheric Environment, 77, 1043-1051, DOI: 10.1016/j.atmosenv.2013.05.072.

G. J. Phillips, N. Pouvesle, J. Thieser, G. Schuster, R. Axinte, H. Fischer, J. Williams, J. Lelieveld, and J. N. Crowley Peroxyacetyl nitrate (PAN) and peroxyacetic acid (PAA) measurements by iodide chemical ionisation mass spectrometry: first analysis of results in the boreal forest and implications for the measurement of PAN fluxes. Atmos. Chem. Phys., 13, 1129–1139, 2013.

A. L. Vogel, M. Äijälä, M. Brüggemann, M. Ehn, H. Junninen, T. Petäjä, D. R. Worsnop, M. Kulmala, J. Williams, and T. Hoffmann. Online atmospheric pressure chemical ionization ion trap mass spectrometry (APCI-IT-MSn) for measuring organic acids in concentrated bulk aerosol – a laboratory and field study. Atmospheric Measurement Techniques, 6, 2, 431-443, DOI: 10.5194/amt-6-431-2013.

A. L. Vogel, M. Äijälä, A. L. Corrigan, H. Junninen, M. Ehn, T. Petäjä, D. R. Worsnop, M. Kulmala, L. M. Russell, J. Williams, and T. Hoffmann. In-situ submicron organic aerosol characterization at a boreal forest research station during HUMPPA-COPEC 2010 using soft and hard ionization mass spectrometry. Atmos. Chem. Phys., 13, 10933–10950, 2013, doi:10.5194/acp-13-10933-2013.

F. Ziska, B. Quack, K. Abrahamsson, S. D. Archer, E. Atlas, T. Bell, J. H. Butler, L. J. Carpenter, C. E. Jones, N. R. P. Harris, H. Hepach, K. G. Heumann, C. Hughes, J. Kuss, K. Krüger, P. Liss, R. M. Moore, A. Orlikowska, S. Raimund, C. E. Reeves, W. Reifenhäuser, A. D. Robinson, C. Schall, T. Tanhua, S. Tegtmeier, S. Turner, L. Wang, D. Wallace, J. Williams, H. Yamamoto, S. Yvon-Lewis, and Y. Yokouchi, Global sea-to-air flux climatology for bromoform, dibromomethane and methyl iodide. Atmos. Chem. Phys., 13, 8915–8934, 2013. doi:10.5194/acp-13-8915-2013.

M. D. Andres-Hernandez, D. Kartal, J. N. Growley, V. Sinha, E. Regelin, M. Mart´ınez-Harder, V. Nenakhov, J. Williams, H. Harder, H. Bozem, W. Song, J. Thieser, M.-J. Tang, Z. Hosaynali Beygi, and J. P. Burrows. Diel peroxy radicals in a semi industrial coastal area: nighttime formation of free radicals, Atmos. Chem. Phys. Atmos. Chem. Phys., 13, 5731–5749, 2013. doi:10.5194/acp-13-5731-2013.

W. Song, M. Staudt, I. Bourgeois, and J. Williams. Laboratory and field measurements of enantiomeric monoterpene emissions as a function of chemotype, light and temperature. Biogeosciences Discuss., 10, 16805-16841, 2013. J. A. Adame, M. Martínez, M. Sorribas, P. J. Hidalgo, H. Harder, J.-M. Diesch, F. Drewnick, W. Song, J. Williams, V. Sinha, M. A. Hernández-Ceballos, J. Vilà-Guerau de Arellano, R. Sander, Z. Hosaynali-Beygi, H. Fischer, J. Lelieveld, and B. De la Morena. Meteorology during the DOMINO campaign and its connection with trace gases and aerosolsAtmos. Chem. Phys. Discuss., 13, 19237–19289, 2013.

P. Warneck and J. Williams. The Atmospheric Chemist´s Companion. Springer; 1st Edition. 2102 edition (18 Feb 2012), ISBN-10: 9400722745, ISBN-13: 978-9400722743.

W. Song, J. Williams, N. Yassaa, M. Martinez, J. Antonio Adame Carnero, P. J. Hidalgo, H. Bozem and J. Lelieveld, Winter and summer characterization of biogenic enantiomeric monoterpenes and anthropogenic BTEX compounds at a Mediterranean Stone Pine forest site. J. atmos. Chem. DOI: 10.1007/s10874-012-9219-4.

C. Dolgorouky, V. Gros, R. Sarda-Esteve, V. Sinha, J. Williams, N. Marchand, S. Sauvage, L. Poulain, J. Sciare, and B. Bonsang, Total OH reactivity measurements in Paris during the 2010 MEGAPOLI winter campaign, Atmos. Chem. Phys., 12, 9593-9612, 2012.

A. C. Nölscher, V. Sinha, S. Bockisch, T. Klüpfel, and J. Williams, A new method for total OH reactivity measurements using a fast Gas Chromatographic Photo-Ionization Detector (GC-PID). Atmos. Meas. Tech. Discuss., 5, 3575-3609, 2012

N. Yassaa, W. Song, J. Lelieveld, A. Vanhatalo, J. Bäck, and J. Williams. Diel cycles of isoprenoids in the emissions of Norway spruce, four Scots pine chemotypes, and in Boreal forest ambient air during HUMPPA-COPEC-2010N Atmos. Chem. Phys. Discuss., 12, 10425-10460, 2012

A. C. Nölscher, J. Williams, V. Sinha, T. Custer, W. Song, A. M. Johnson, R. Axinte, H. Bozem, H. Fischer, N. Pouvesle, G. Phillips, J. N. Crowley, P. Rantala, J. Rinne, M. Kulmala, D. Gonzales, J. Valverde-Canossa, A. Vogel, T. Hoffmann, H. G. Ouwersloot, J. Vilà-Guerau de Arellano, and J. Lelieveld, Summertime total OH reactivity measurements from boreal forest during HUMPPA-COPEC 2010, Atmos. Chem. Phys., 12, 8257-8270, 2012.

B. J. H. van Stratum, J. Vilà-Guerau de Arellano, H. G. Ouwersloot, K. van den Dries, T. W. van Laar, M. Martinez, J. Lelieveld, J.-M. Diesch, F. Drewnick, H. Fischer, Z. Hosaynali Beygi, H. Harder, E. Regelin, V. Sinha, J. A. Adame, M. Sörgel, R. Sander, H. Bozem, W. Song, J. Williams, and N. Yassaa, Study of the diurnal variability of atmospheric chemistry with respect to boundary layer dynamics during DOMINO, Atmos. Chem. Phys., 12, 5329-5341, 2012.

V. Sinha, J. Williams, J. M. Diesch, F. Drewnick, M. Martinez, H. Harder, E. Regelin, D. Kubistin, H. Bozem, Z. Hosaynali-Beygi, H. Fischer, M. D. Andrés-Hernández, D. Kartal, J. A. Adame, and J. Lelieveld. OH reactivity measurements in a coastal location in Southwestern Spain during DOMINO, Atmos. Chem. Phys., 12, 7269-7283, 2012.

C. J. Kampf, A. L. Corrigan, A. M. Johnson, W. Song, P. Keronen, R. Königstedt, J. Williams, L. M. Russell, T. Petäjä, H. Fischer, and T. Hoffmann. First measurements of reactive α-dicarbonyl concentrations on PM2.5 aerosol over the boreal forest in Finland during HUMPPA-COPEC 2010 – source apportionment and links to aerosol aging, Atmos. Chem. Phys., 12, 6145-6155, 2012.

H. G. Ouwersloot, J. Vilà-Guerau de Arellano, A. C. Nölscher, M. C. Krol, L. N. Ganzeveld, C. Breitenberger, I. Mammarella, J. Williams, and J. Lelieveld. Characterization of a boreal convective boundary layer and its impact on atmospheric chemistry during HUMPPA-COPEC-2010, Atmos. Chem. Phys., 12, 9335-9353, 2012.

C. Ebben, M. Shrestha, I. Martinez, A. Corrigan, A. A. Frossard, W. Song, T. Petäjä, J. Williams, L. M. Russell, A. Goldstein, P. Artaxo, S. T. Martin, R. J. Thomson, F. M. Geiger, M. Kulmala, and D. Worton Organic Constituents on the Surfaces of Aerosol Particles from Southern Finland, Amazonia, and California Studied by Vibrational Sum Frequency Generation., J. Phys. Chem. A, Publication Date (Web): June 26, 2012 (Feature Article) DOI: 10.1021/jp302631z.

A.C. Nölscher, E. Bourtsoukidis, B. Bonn, J. Kesselmeier, J. Lelieveld, and J. Williams. Seasonal measurements of total OH reactivity fluxes, total ozone loss rates and missing emissions from Norway spruce in 2011, Biogeosciences Discuss., 9, 13497-13536, 2012.


J. Williams, J. Crowley, H. Fischer, H. Harder, M. Martinez, T. Petäjä, J. Rinne, J. Bäck, M. Boy, M. Dal Maso, J. Hakala, M. Kajos, P. Keronen, P. Rantala, J. Aalto, H. Aaltonen, J. Paatero, T. Vesala, H. Hakola, J. Levula, T. Pohja, F. Herrmann, J. Auld, E. Mesarchaki, W. Song, N. Yassaa, A. Nölscher, A. M. Johnson, T. Custer, V. Sinha, J. Thieser, N. Pouvesle, D. Taraborrelli, M. J. Tang, H. Bozem, Z. Hosaynali-Beygi, R. Axinte, R. Oswald, A. Novelli, D. Kubistin, K. Hens, U. Javed, K. Trawny, C. Breitenberger, P. J. Hidalgo, C. J. Ebben, F. M. Geiger, A. L. Corrigan, L. M. Russell, H. Ouwersloot, J. Vilà-Guerau de Arellano, L. Ganzeveld, A. Vogel, M. Beck, A. Bayerle, C. J. Kampf, M. Bertelmann, F. Köllner, T. Hoffmann, J. Valverde, D. González, M.-L. Riekkola, M. Kulmala, and J. Lelieveld. The summertime Boreal forest field measurement intensive (HUMPPA-COPEC-2010): an overview of meteorological and chemical influences Atmos. Chem. Phys., 11, 10599-10618, 2011

C. J. Ebben, I. S. Martinez, M. Shrestha, A. M. Buchbinder, A. L. Corrigan, A. Guenther, T. Karl, T. Petäjä, W. W. Song, S. R. Zorn, P. Artaxo, M. Kulmala, S. T. Martin, L. M. Russell, J. Williams, and F. M. Geiger, Contrasting organic aerosol particles from boreal and tropical forests during HUMPPA-COPEC-2010 and AMAZE-08 using coherent vibrational spectroscopy. Atmos. Chem. Phys., 11, 10317-10329, 2011

S.C. Lai, J. Williams, S.R. Arnold, E.L. Atlas, S. Gebhardt, T. Hoffmann. Iodine containing species in the remote marine boundary layer: a link to oceanic phytoplankton. Geophys. Res. Lett., Vol. 38, No. 20, L20801.

V. Gros, C. Gaimoz, F. Herrmann, T. Custer, J. Williams, B. Bonsang, S. Sauvage, N. Locoge, O. d’Argouges, R. Sarda-Estève and J. Sciare Volatile organic compounds sources in Paris in spring 2007. Part I: qualitative analysis, Environ. Chem. 2011, 8, 74–90. doi:10.1071/EN10068.

C. Gaimoz, S. Sauvage, V. Gros, F. Herrmann, J. Williams, N. Locoge, O. Perrussel, B. Bonsang, O. d’Argouges, R. Sarda-Estève, and J. Sciare. Volatile organic compound sources in Paris in Spring 2007, part II: source apportionment using positive matrix factorization, Environmental Chemistry, 2011, 8, 91–103. doi:10.1071/EN10067.

D. Mogensen, S. Smolander, A. Sogachev, L. Zhou, V. Sinha, A. Guenther, J. Williams, T. Nieminen, M. Kajos, J. Rinne, M. Kulmala, and M. Boy: Modelling atmospheric OH-reactivity in a boreal forest ecosystem, Atmos. Chem. Phys. Discuss., 11, 9133-9163, doi:10.5194/acpd-11-9133-2011, 2011.

J. N. Crowley, J. Thieser, M. J. Tang, G. Schuster, H. Bozem, Z. H. Beygi, H. Fischer, J.-M. Diesch, F. Drewnick, S. Borrmann, W. Song, N. Yassaa, J. Williams, D. Pöhler, U. Platt, and J. Lelieveld. Variable lifetimes and loss mechanisms for NO3 and N2O5 duringthe DOMINO campaign: contrasts between marine, urban and continental air Atmos. Chem. Phys., 11, 10853–10870, 2011

J. Williams and P.J. Crutzen, Nitrous oxide from aquaculture, Nature Geoscience 3, 143 (2010), doi:10.1038/ngeo804.

J. Williams, T. Custer, H. Riede, R. Sander, P. Jöckel, P. Hoor, A. Pozzer, S. Wong-Zehnpfennig, Z. Hosaynali Beygi, H. Fischer, V. Gros, A. Colomb, B. Bonsang, N. Yassaa, I. Peeken, E. L. Atlas, C. M. Waluda, J. A. van Aardenne and J. Lelieveld. Assessing the effect of marine isoprene and ship emissions on ozone, using modelling and measurements from the South Atlantic Ocean. Environ. Chem. 7, 171–182. doi:10.1071/EN09154, 2010.

D.B. Millet, A. Guenther, D.A. Siegel, N.B. Nelson, H.B. Singh, Gouw, C. Warneke, J. Williams, G. Eerdekens, V. Sinha, T. Karl, F. Flocke, E. Apel, D.D. Riemer, P.I. Palmer, and M. Barkley. Global atmospheric budget of acetaldehyde: 3-D model analysis and constraints from in-situ and satellite observations. Atmos. Chem. Phys., 10, 3405-3425, 2010

R. Holzinger, J. Williams, F. Herrmann, J. Lelieveld, N.M. Donahue, and T. Röckmann. Aerosol analysis using a Thermal-Desorption Proton-Transfer-Reaction Mass Spectrometer (TD-PTR-MS): a new approach to study processing of organic aerosols. Atmos. Chem. Phys., 10, 2257-2267, 2010.

S. R. Arnold, D. V. Spracklen, S. Gebhardt, T. Custer, J. Williams, I. Peeken and S. Alvain, Relationships between atmospheric organic compounds and air-mass exposure to marine biology, Environ. Chem. 2010, 7, 232–241. doi:10.1071/EN09144.

F. Herrmann, R. Winterhalter, G.K. Moortgat, J. Williams, Hydroxyl radical (OH) yields from both double bonds for five monoterpenes. Atmos. Environ. 44 (2010) 3458e3464. S. Huber, S . Wunderlich, H. Schöler, & J. Williams, Natural Abiotic Formation of Furans in Soil. Environ. Sci. & Tech. 44, 15, 5799-5804, 2010

V. Sinha, J. Williams, J. Lelieveld, T.M. Ruuskanen, M.K. Kajos, J. Patokoski, H. Hellen, H. Hakola, D. Mogensen, M. Boy, J. Rinne, M. Kulmala: OH Reactivity Measurements within a Boreal Forest: Evidence for Unknown Reactive Emissions. Environmental Science & Technology 2010 44 (17), 6614-6620.

Yassaa, N., Custer, T., Song, W., Pech, F., Kesselmeier, J., and Williams, J.: Quantitative and enantioselective analysis of monoterpenes from plant chambers and in ambient air using SPME, Atmos. Meas. Tech., 3, 1615-1627, doi:10.5194/amt-3-1615-2010, 2010.

B. Bonsang, V. Gros, I. Peeken, N. Yassaa, K. Bluhm, E. Zoellner, R. Sarda-Esteve and J. Williams. Isoprene emission from phytoplankton monocultures: the relationship with chlorophyll-a, cell volume and carbon content. Environ. Chem. 2010, 7, 554–563. doi:10.1071/EN09156

S. R.,Arnold, D. V. Spracklen, J. Williams, N. Yassaa, J. Sciare, B. Bonsang, V. Gros, I. Peeken, A. C. Lewis, S. Alvain, and C. Moulin: Evaluation of the global oceanic isoprene source and its impacts on marine organic carbon aerosol. Atmos. Chem. Phys., 9, 1253-1262, 2009.

Colomb, A., V. Gros, S. Alvain, R. Sarda-Esteve, B. Bonsang, C. Moulin, T. Klüpfel, and J. Williams: Variations of atmospheric Volatile Organic Compounds over the Southern Indian Ocean (30°S-49°S). Environmental Chemistry, 6, 70-82, doi: 10.1871/EN8072, 2009.

Eerdekens G., L. Ganzeveld, J. Vilà-Guerau de Arellano, T. Klüpfel, V. Sinha, N. Yassaa, J. Williams, H. Harder, D. Kubistin, M. Martinez, and J. Lelieveld: Flux estimates of isoprene, methanol and acetone from airborne PTR-MS measurements over the tropical rainforest during the GABRIEL 2005 campaign. Atmos. Chem. Phys., 9, 4207-4227, 2009

Eerdekens, G., Yassaa, N., Sinha, V., Aalto, P. P., Aufmhoff, H., Arnold, F., Fiedler, V., Kulmala, M., and Williams, J.: VOC measurements within a boreal forest during spring 2005: on the occurrence of elevated monoterpene concentrations during night time intense particle concentration events, Atmos. Chem. Phys., 9, 8331–8350, doi:10.5194/acp-9-8331-2009, 2009.

Huber S. G., K. Kotte, H. F. Schöler, and J. Williams: Natural Abiotic Formation of Trihalomethanes in Soil: Results from Laboratory Studies and Field Samples. Environ. Sci. Technol., 43 (13), 4934–4939, doi: 10.1021/es8032605, 2009

Taddei S., P. Toscano, B. Gioli, A. Matese, F. Miglietta, F. P. Vaccari, A. Zaldei, T. Custer, and J. Williams: Carbon Dioxide and Acetone Air−Sea Fluxes over the Southern Atlantic. Environ. Sci. Technol., 43 (14), 5218–5222, doi: 10.1021/es8032617, 2009.

Sinha, V., T. G. Custer, T. Kluepfel, and J. Williams: The effect of relative humidity on the detection of pyrrole by PTR-MS for OH reactivity measurements. Int. J. Mass Spectrom., 282, 108, 2009.

Winterhalter, R., M. Kippenberger, J. Williams, E. Fries, K. Sieg, and G. K. Moortgat: Concentrations of higher dicarboxylic acids C5–C13 in fresh snow samples collected at the High Alpine Research Station Jungfraujoch during CLACE 5 and 6. Atmos. Chem. Phys., 9, 2097-2112, 2009

Fowler et al. Atmospheric composition change: Ecosystem-Atmosphere interactions. Atmospheric Environment, Volume 43, Issue 33, October 2009, Pages 5193-5267

Butler,J.H., Bell,T.G., Hall,B.D., Quack,B., Carpenter,L.J., and Williams,J.: Technical Note: Ensuring consistent, global measurements of short-lived halocarbon gases in the ocean and atmosphere, Atmos. Chem. Phys. Discuss., 9, 11287-11297

Liakakou, E.; Bonsang, B.; Williams, J.; Kalivitis, N.; Kanakidou, M.; Mihalopoulos, N. C2-C8 NMHCs over the Eastern Mediterranean: Seasonal variation and impact on regional oxidation chemistry Atmospheric Environment, 43, 35, 5611-5621, 2009

Yassaa N., A. Wishkerman, F. Keppler, and J. Williams: Fast determination of methyl chloride and methyl bromide emissions from dried plant matter and soil samples using HS-SPME and GC-MS: method and first results. Environ. Chem., 6, 311–318, doi:10.1071/EN09034, 2009

Butler, T., D. Taraborrelli, C. Brühl, H. Fischer, H. Harder, M. Martinez, J. Williams, M. Lawrence, and J. Lelieveld: Improved simulation of isoprene oxidation chemistry with the ECHAM5/MESSy chemistry-climate model: Lessons from the GABRIEL airborne field campaign The "Guyanas Atmosphere-Biosphere exchange and Radicals Intensive Experiment with a Learjet" (GABRIEL) measurement campaign in October 2005. Atmos. Chem. Phys., 8, 4529-4546, 2008.

Colomb, A., N. Yassaa, J. Williams, I.Peeken, and K. Lochte: Screening volatile organic compounds (VOCs) emissions from five marine phytoplankton species by headspace gas chromatography-mass spectrometry (HS-GC/MS). J. Environ. Monit., doi:10.1039/B715312K, 2008.

Ekman, A. M. L., R. Krejci, A. Engström, J. Ström, M. de Reus, J. Williams, and M. O. Andreae: Do organics contribute to small particle formation in the Amazonian upper troposphere? Geophys. Res. Lett. 2008GL034970, 35, 17, L17810, 2008.

Fries, E., K. Sieg, W. Jaeschke, W. Püttmann, R. Winterhalter, J. Williams, and G. Moortgat: Benzene, alkylated benzenes, chlorinated hydrocarbons and monoterpenes in snow/ice at Jungfraujoch (46.6 degrees N, 8.0 degrees E) during CLACE 4 and 5. Special Issue "Research at Jungfraujoch: Top of Science.Sci. Total. Environ 391, 2-3, 269-277, 2008.

Ganzeveld, L. G. Eerdekens, G. Feig, H. Fischer, H. Harder, R. Königstedt, D. Kubistin, M. Martinez, F. X. Meixner, B. Scheeren, V. Sinha, D. Taraborrelli, J. Williams, J. Vilà-Guerau de Arellano, and J. Lelieveld: Surface and boundary layer exchanges of volatile organic compounds, nitrogen oxides and ozone during the GABRIEL Campaign. Atmos. Chem. Phys., 8, 6223-6243, 2008.

Gebhardt, S., A Colomb, R. Hofmann, J. Williams, and J. Lelieveld: Halogenated organic species over the tropical rainforest. Atmos. Chem. Phys., 8, 3185-3197, 2008.

Kubistin, D., H. Harder, M. Martinez, M. Rudolf, R. Sander, H. Bozem, G. Eerdekens, H. Fischer, C. Gurk, T. Klüpfel, R. Königstedt, U. Parchatka, C. L. Schiller, A. Stickler, D. Taraborrelli, J. Williams, and J. Lelieveld: Hydroxyl radicals in the tropical troposphere over the Suriname rainforest: comparison of measurements with the box model MECCA Atmos. Chem. Phys. Discuss., 8, 15239-15289, 2008.

Lelieveld, J., T. M. Butler, J. N. Crowley, T. J. Dillon, H. Fischer, L. Ganzeveld, H. Harder, M. G. Lawrence, M. Martinez, D. Taraborrelli, and J. Williams: Atmospheric oxidation capacity sustained by a tropical forest. Nature 452, 737-740, doi:10.1038/nature0687, 2008.

Martinez, M., H. Harder, D. Kubistin, M. Rudolf, H. Bozem, G. Eerdekens, H. Fischer, C. Gurk, T. Klüpfel, R. Königstedt, U. Parchatka, C. L. Schiller, A. Stickler, J. Williams, and J. Lelieveld: Hydroxyl radicals in the tropical troposphere over the Suriname rainforest: airborne measurements. Atmos. Chem. Phys. Discuss., 8, 15491-15536, 2008.

Millet, D. B., D. J. Jacob, T. G. Custer, J. A. de Gouw, A. H. Goldstein, T. Karl, H. B. Singh, B. C. Sive, R. W Talbot, C. Warneke, and J. Williams: New constraints on terrestrial and oceanic methanol. Atmos. Chem. Phys., 8, 6887-6905, 2008.

Sinha, V., J. Williams, J. Crowley, and J. Lelieveld: Comparative reactivity method - a new tool for measuring total OH reactivity in ambient air. Atmos. Chem. Phys., 8, 2213-2227, 2008.

Vogt, M., S. Turner, N. Yassaa, M. Steinke, J. Williams, and P. Liss: Laboratory inter-comparison of dissolved dimethyl sulphide (DMS) measurements using purge-and-trap and solid-phase microextraction techniques during a mesocosm experiment. Marine Chemistry, 108, 32-39, 2008.

Williams J.: Provoking the Air. A concept article. Environmental Chemistry, 5, 317-319, 2008.

Wishkerman, A., S. Gebhardt, C. W. McRoberts, J. T. G. Hamilton, J. Williams, and F. Keppler: Abiotic methyl bromide formation from vegetation and its strong dependence on temperature. Environ. Sci. & Tech. 42 , 18 , 6837-6842, 2008.

Yassaa, N. I. Peeken, E. Zöllner, K. Bluhm, S. Arnold, D. Spracklen, and J. Williams: Evidence for marine production of monoterpenes. Environmental Chemistry, 5, 391-401. doi.10.1071/EN08047, 2008.

Bartenbach, S., J. Williams, C. Plass-Dülmer, H. Berresheim, and J. Lelieveld: In-situ measurement of reactive hydrocarbons at Hohenpeissenberg with comprehensive gas chromatography (GCxGC-FID): use in estimating HO and NO3. Atmos. Chem. Phys. 7, 1-14, 2007.

Sinha, V., J. Williams, P. J. Crutzen, and J. Lelieveld: Methane emissions from boreal and tropical forest ecosystems derived from in-situ measurements Atmos. Chem. Phys. Discuss., 7, 14011-14039, 2007.

Sinha, V., J. Williams, M. Meyerhöfer, U. Riebesell, A.I. Paulino, and A. Larsen: Air-sea fluxes of methanol, acetone, acetaldehyde, isoprene and DMS from a Norwegian fjord following a phytoplankton bloom in a mesocosm experiment. Atmos. Chem. Phys., 7, 739-755, 2007.

Stickler, A., H. Fischer, H. Bozem, C. Gurk, C. Schiller, M. Martinez-Harder, D. Kubistin, H. Harder, J. Williams, G. Eerdekens, N. Yassaa, L. Ganzeveld, R. Sander, and J. Lelieveld: Chemistry, transport and dry deposition of trace gases in the boundary layer over the tropical Atlantic Ocean and the Guyanas during the GABRIEL field campaign. Atmos. Chem. Phys., 7, 3933-3956, 2007.

Williams, J., V. Gros, E. Atlas, K. Maciejczyk, A. Batsaikhan, H. F. Schöler, C. Forster, B. Quack, N. Yassaa, R. Sander, and R. Van Dingenen: Possible evidence for a connection between methyl iodide emissions and Saharan dust. J. Geophys. Res., 112, D7, D07302, 2007.

Williams, J., N. Yassaa, S. Bartenbach, and J. Lelieveld: Mirror image hydrocarbons from Tropical and Boreal forests. Atmos. Chem. Phys., 7, 973-980, 2007.

Yassaa N., and J. Williams: Enantiomeric monoterpene emissions from natural and damaged Scots pine in a boreal coniferous forest measured using solid-phase microextraction and gas chromatography/mass spectrometry. J. Chromatogr. A. (2206) doi:10.1016/Jchroma.2006.12.006, 2007.

Colomb, A., J. Williams, J. Crowley, V. Gros, R. Hofmann, G. Salisbury, T. Kluepfel, R. Kormann, A. Stickler, C. Forster, J. Lelieveld: Airborne measurements of trace organic species in the upper troposphere over Europe: the impact of deep convection. Environ. Chem. 3, 4, 244-259 2006.

Drewnick, F., S. S. Hings, J. Curtius, G. Eerdekens, and J. Williams: Measurement of fine particulate and gas-phase species during the New Year's Fireworks 2005 in Mainz, Germany. Atmos. Environment 40, 4316-4326, 2006.

Pozzer, A., P. Jöckel, R. Sander, J. Williams, L. Ganzeveld, and J. Lelieveld: Technical Note: The MESSy-submodel AIRSEA calculating the air-sea exchange of chemical species. Atmos. Chem. Phys. 6, 5435-5444, 2006.

Salisbury, G., J. Williams, V. Gros, S. Bartenbach, X. Xu, H. Fischer, R. Kormann, M. de Reus, and M. Zöllner: Assessing the effect of a Saharan dust storm on oxygenated organic compounds at Izaña, Tenerife (July-August 2002). J. Geophys. Res., 111, D22, No. D22303, 2006.

Stickler, A., H. Fischer, J. Williams, M. de Reus, R. Sander, M. G. Lawrence, J. N. Crowley, and J. Lelieveld: Influence of summertime deep convection on formaldehyde in the middle and upper troposphere over Europe, J. Geophys. Res., 111, D14308, doi:10.1029/2005JD007001, 2006.

Williams, J.: Mass spectrometric methods for atmospheric trace gases. In “Analytical Methods in Atmospheric Chemistry”, Prof. Dwayne Heard (Ed.), Chapter 5, 2006.

Yassaa, N., A. Colomb, K. Lochte, I. Peeken, and J. Williams: Development and application of a headspace solid-phase microextraction and gas chromatography/mass spectrometry method for the determination of Dimethylsulfide (DMS) emitted by eight marine phytoplankton species. Limnology and Oceanography – Methods 4: 374-381, 2006.

Holzinger, R., J. Williams, G. Salisbury, T. Klüpfel, M. de Reus, M. Traub, P. J. Crutzen, and J. Lelieveld: Oxygenated compounds in aged biomass burning plumes over the Eastern Mediterranean: evidence for strong secondary production of methanol and acetone, Atmos. Chem. Phys., 5, 39-46, 2005.

Krejci, R., J. Ström, M. de Reus, J. Williams, H. Fischer, M.O. Andreae, and H.C. Hansson: Spatial and temporal distribution of atmospheric aerosols in the lowermost troposphere over the Amazon tropical rainforest. Atmos. Chem. Phys., 5, 1527-1543, 2005.
de Reus, M., H. Fischer, R. Sander, V. Gros, R. Kormann, G. Salisbury, R. Van Dingenen, J. Williams, M. Zöllner, and J. Lelieveld: Observations and model calculations of trace gas scavenging in a dense Saharan dust plume during MINATROC, Atmos. Chem. Phys., 5, 1787-1803, 2005.

Williams, J., F. Drewnick, S. S. Hings, J. Curtius, G. Eerdekens, T. Klüpfel, and T. Wagner: Firework emissions for satellite validation ? Environ. Chem. 2, 1-2, doi:1071/EN05022, 2005.

Yassaa, N., and J. Williams: Analysis of enantiomeric and non-enantiomeric monoterpenes in plant emissions using portable dynamic air sampling/solid phase microextraction (PDAS-SPME) and chiral gas chromatography/mass spectrometry. Atmos.Environ. 39, 4875-4884, 2005.

Gros, V., J. Williams, M. G. Lawrence, R. von Kuhlmann, J. van Aardenne, E. Atlas, A. Chuck, D. P Edwards, V. Stroud, and M. Krol: Tracing the origin and ages of interlaced atmospheric pollution events over the tropical Atlantic Ocean with in situ measurements, satellites, trajectories, emission inventories, and global models. J. Geophys. Res., 109, D22, D22306, 2004.

de Gouw, J., C. Warneke, R. Holzinger, T. Klüpfel, and J. Williams: Inter-comparison between airborne measurements of methanol, acetonitrile and acetone using two differently configured PTR-MS instruments. Int. J. of Mass Spec., 239 (2-3), 129-137, 2004.
Lelieveld, J., J.van Aardenne, H. Fischer, M. de Reus, J. Williams, and P. Winkler: Increasing ozone over the Atlantic Ocean. Science, 304, 1483-1487, 2004.

Parrish, D. D., T. B. Ryerson, J. S. Holloway, J. A. Neuman, J. M. Roberts, J. Williams, C. A. Stroud, G. J. Frost, M. Trainer, G. Hübler, F. C. Fehsenfeld, F. Flocke, and A. J. Weinheimer: Fraction and composition of Noy transported in air masses lofted from the North American continental boundary layer. J. Geophys. Res., 109, No. D9, D09302 10.1029/2003JD004226, 2004.
Williams, J.: Organic trace gases : An overview. Environ. Chem., 1, 125-136. doi.:10.1071EN04057, 2004.

Williams, J., R. Holzinger, V. Gros, X. Xu, E. Atlas, and D. W. R. Wallace: Measurements of organic species in air and seawater from the tropical Atlantic. Geophys. Res. Letts, 31, L23S06, 2004.

Fischer, H., M. de Reus, M. Traub, J. Williams, J. Lelieveld, J. de Gouw, C. Warneke, H. Schlager, A. Minikin, R. Scheele, and P. Siegmund: Deep convective injection of boundary layer air into the lowermost stratosphere at midlatitudes. Atmos. Chem. Phys., 3, 739-745, 2003.

Gros, V., J. Williams, J. van Aardenne, G. Salisbury, R. Hofmann, M. G. Lawrence, R. von Kuhlmann, J. Lelieveld, M. Krol, H. Berresheim, and E. Atlas: Origin of anthropogenic hydrocarbons and halocarbons measured in the summertime european outflow (on Crete in 2001). Atmos. Chem. Phys., 3, 1223-1235, 2003.

Kormann, R., H. Fischer, M. de Reus, M. Lawrence, Ch. Brühl, R. von Kuhlmann, R. Holzinger, J. Williams, J. Lelieveld, C. Warneke, J. de Gouw, J. Heland, H. Ziereis, and H. Schlager: Formaldehyde over the eastern Mediterranean during MINOS: Comparison of airborne in-situ measurements with 3D-model results. Atmos. Chem. Phys., 3, 851-861, 2003.

Krejci, R., J. Ström, M. de Reus, P. Hoor, J. Williams, H. Fischer, and H.-C. Hansson: The evolution of aerosol properties over the rainforest during the LBA-CLAIRE experiment. J. Geophys. Res., 108 (D18), 4561, 2003.

Krol, M. C., J. Lelieveld, D. E. Oram, G. A. Sturrock, S. A. Penkett, C. A. M. Brenninkmeijer, V. Gros, J. Williams, and H. A. Scheeren: Continuing emissions of methyl chloroform from Europe (2002). Nature, 421,131-135, 2003.

Lawrence, M. G., P. J. Rasch, R. von Kuhlmann, J. Williams, H. Fischer, M. de Reus, J. Lelieveld, P. J. Crutzen, M. Schultz, P. Stier, H. Huntrieser, J. Heland, A. Stohl, C. Forster, H. Elbern, H. Jakobs, and R. R. Dickerson: Global chemical weather forecasts for field campaign planning: predictions and observations of large-scale features during MINOS, CONTRACE, and INDOEX. Atmos. Chem. Phys., 3, 267-289, 2003.

de Reus, M., H. Fischer, F. Arnold, J. de Gouw, R. Holzinger, C. Warneke, and J. Williams: On the relationship between acetone and carbon monoxide in different airmasses. Atmos. Chem. Phys., 3, 1709-1723, 2003.

Salisbury, G., J. Williams, R. Holzinger, V. Gros, L. Lange, X. Xu, N. Mihalopoulos, M. Vrekoussis, J. Sciare, H. Berresheim, M. Lawrence, R. von Kuhlmann, and J. Lelieveld: Ground-based PTR-MS measurements of reactive organic compounds during the MINOS campaign in Crete, July-August 2001. Atmos. Chem. Phys., 3, 925-940, 2003.

Scheeren, H. A., C. Warneke, H. Fischer, J. Williams, and J. Lelieveld: Measurements of reactive chlorocarbons over the Surinam tropical rain forest: indications for strong biogenic emissions. Atmos. Chem. Phys. Discuss., 3, 5469-5512, 2003.

Scheeren, H. A., J. Lelieveld, G. J. Roelofs, J. Williams, H. Fischer, M. de Reus, J. A. de Gouw, C. Warneke, R. Holzinger, H. Schlager, T. Klüpfel, M. Bolder, C. van der Veen, and M. Lawrence: The impact of monsoon outflow from Southeast Asia in the upper troposphere over the eastern Mediterranean. Atmos. Chem. Phys., 3, 1589-1608, 2003.

Traub, M., H. Fischer, M. de Reus, R. Kormann, J. Heland, H. Ziereis, H. Schlager, R. Holzinger, J. Williams, C. Warneke, J. de Gouw, and J. Lelieveld: Chemical characteristics assigned to trajectory clusters during the MINOS campaign. Atmos. Chem. Phys. 3, 459-468, 2003.

Wollenhaupt, M., J. Williams, and J. N. Crowley: Reaction of HO and DO with 2-vinylfuran. Phys. Chem. Chem. Phys. 5 (20): 4612-4616, 2003.

X. Xu, L. L. P. Stee, J Williams, J. Beens, M. Adahchour, R. J. J. Vreuls, U. A. Brinkman, and J. Lelieveld: Comprehensive two-dimensional gas chromatography (GC x GC) measurements of volatile organic compounds in the atmosphere X. Xu, Atmos. Chem. Phys., 3, 1477-1513, 2003.

Dallüge, J., L. L. P. van Stee, X. Xu, J. Williams, J. Beens, R. J. J. Vreuls, and U. A. Th. Brinkman: Unravelling the composition of very complex samples by comprehensive gas chromatography coupled to time-of-flight mass spectrometry : Cigarette Smoke. Journal of Chromatography, 974, 169-194, 2002.

Fischer, H., D. Brunner, G. W. Harris, P. Hoor, J. Lelieveld, D. Mckenna, J. Rudolph, H. A. Scheeren, P. Siegmund, H. Wernli, J. Williams, and S. Wong: Synoptic tracer gradients in the upper troposphere over central Canada during the Stratosphere-Troposphere experiments by aircraft measurements 1998 summer campaign. J. Geophys. Res. 107, D8, 10.1029 (2001JD000312), 2002.

Frost, G. J., A. Fried, Y.-N. Lee, B. Wert, B. Henry, J. R. Drummond, M. J. Evans, F. C. Fehsenfeld, P. D. Goldan, J. S. Holloway, G. Huebler, R. Jakoubek, B. T. Jobson , K. Knapp, W. C. Kuster, J. M. Roberts, J. Rudolph, T. B. Ryerson, A. Stohl, C. Stroud, D. T. Sueper, M. Trainer, and J. Williams: Comparisons of box model calculations and measurements of formaldehyde from the 1997 North Atlantic Regional Experiment. J. Geophys. Res. 107, D8, 10.1029 (2001JD000896), 2002.

Lelieveld, J., H. Berresheim, S. Borrmann, P. J. Crutzen, F. J. Dentener, H. Fischer, J. Feichter P. J. Flatau, J. Heland, R. Holzinger, R. Kormann, M. G. Lawrence, Z. Levin, K. M. Markowicz, N. Mihalopoulos, A. Minikin, V. Ramanathan, M. de Reus, G. J. Roelofs, H. A. Scheeren, J. Sciare, H. Schlager, M. Schultz, P. Siegmund, B. Steil, E. G. Stephanou, P. Stier, M. Traub, C. Warneke, J.Williams, and H. Ziereis: Global Air Pollution Crossroads over the Mediterranean.Science, 298, 794-799, 2002.

Williams, J., H. Fischer, S. Wong, P. J. Crutzen, M. P. Scheele and J. Lelieveld: Near Equatorial CO and O3 profiles over the Indian Ocean during the winter monsoon: High O3 levels in the middle troposphere and interhemispheric exchange. J. Geophys. Res., INDOEX Special Issue 2, 107 (D19), 8007, 2002.

Williams, J., M. de Reus, R. Krejci, H. Fischer, and J. Ström: Application of the Variability-Size relationship to atmospheric aerosol studies : estimating aerosol lifetimes and ages. Atmos. Chem. Phys., 2, 133-145, 2002.

Andreae, M. O., P. Artaxo, H. Fischer, S. R. Freitas, J-M- Grégoire, A. Hansel, P. Hoor, R. Kormann, R. Krecji, L. Lange, J. Lelieveld, W. Lindinger, K. Longo, W. Peters, M. de Reus, H. A. Scheeren, M. A.F . Silva Dias, J. Ström, P. F. J. van Velthoven, and J. Williams: Transport of biomass burning smoke to the upper troposhere by deep convection in the equatorial region. Geophys. Res. Lett., 28 , 951, 2001.

de Gouw, J. A., C. Warneke, H. A. Scheeren, C. van der Veen, M. Bolder, M. P. Scheele J. Williams, S. Wong, L. Lange, H. Fischer, and J. Lelieveld: Overview of the trace gas measurements onboard the Citation aircraft during the intensive field phase of INDOEX. J. Geophys. Res., 106, D22, 28,453, 2001.

Lange, L., P. Hoor, G. Helas, H. Fischer, D. Brunner, B. Scheeren, J. Williams, S. Wong, K-H. Wohlfrom, F. Arnold, J. Ström, R. Krecji, J. Lelieveld. and M. O. Andreae: Chemical Characteristics of air masses over Canada: NO and NOy in the midlatitude upper troposphere. J. Geophys. Res., 106, D21, 27777-27785, 2001.

Lelieveld, J., P. J. Crutzen, V. Ramanathan, M. O. Andreae, C. A. M. Brenninkmeijer, T. Campos, G. R. Cass, R. R. Dickerson, H. Fischer, J. A. de Gouw, A. Hansel, A. Jefferson, D. Kley, A. de Laat, S. Lal, M. G. Lawrence, J. M. Lobert, O. L. Mayol-Bracero, A. P. Mitra, T. Novakov, S. J. Oltmans, K. A. Prather, T. Reiner, H. Rodhe, H. A. Scheeren, D. Sikka, and J. Williams: The Indian Ocean Experiment: Widespread Air Pollution from South and Southeast Asia. Science, 291,1031-1036, 2001.

Pöschl, U., J. Williams, P. Hoor, H. Fischer, P. J. Crutzen C. Warneke, R. Holzinger, A. Hansel, A. Jordan, W. Lindinger H. A. Scheeren, W. Peters, J. Lelieveld: High Acetone Concentrations throughout the 0-12 km Altitude Range over the Tropical Rainforest in Surinam. Atmospheric Chemistry, 38, 115-132, 2001.

Stroud, J., M. Roberts, J. Williams, P. Goldan, W. Kuster. T. Ryerson, D. Sueper, D. Parrish, M. Trainer, F. Fehsenfeld, F. Flocke, S. Schauffler, and V. Stroud, and E. Atlas: Alkyl nitrate measurements during STERAO 1996 and NARE 1997: Intercomparison and survey of results. J. Geophys. Res., 106, D19, 23,043-23,053, 2001.

Warneke, C., R. Holzinger, A. Hansel, A. Jordan, W. Lindinger, U. Pöschl, J. Williams, P. Hoor, H. Fischer, P. J. Crutzen, B. Scheeren, and J. Lelieveld: Isoprene and its oxidation products methyl vinyl ketone, methacrolein, and isoprene related peroxides measured online over the tropical rain forest of Surinam in March 1998. Atmospheric Chemistry, 38, 167-185, 2001.

Williams, J., V. Gros, B. Bonsang, and V. Kazan: The HO cycle in 1997 and 1998 over the southern Indian Ocean empirically derived from CO, Radon and hydrocarbon measurements made at Amsterdam Island. J. Geophys. Res., 106, D12, 12,719-12,725, 2001.

Williams, J., C. Jost, E. Simon, and A. Wisthaler: Using Variability in field measurement interpretation. COAcH School Publication, Chapter 22, 2001.

Williams, J., H. Fischer, P. Hoor, U. Pöschl, P. J. Crutzen, M. O. Andreae, and J. Lelieveld: The influence of the tropical rain forest on atmospheric CO and CO2 as measured by aircraft over Surinam, South America. Chemosphere-Global Change Science, 3, 157-170, 2001.

Williams, J., U. Pöschl, P. J. Crutzen, A. Hansel, R. Holzinger, C. Warneke, W. Lindinger, and J. Lelieveld: An Atmospheric Chemistry Interpretation of Mass Scans obtained from a Proton Transfer Mass spectrometer flown over the Tropical Rainforest of Surinam. J. Atmospheric Chemistry, 38, 133-166, 2001.

Bange, W., and J. Williams: New perspectives on the role of acetonitrile in atmospheric and biogeochemical cycles. Atmos. Environment, 34, 4959-4960, 2000.

Crutzen, P. J., J. Williams, U. Pöschl, P. Hoor, H. Fischer, C. Warneke, R. Holzinger, A. Hansel, W. Lindinger, B. Scheeren, and J. Lelieveld: High Spatial and Temporal Resolution Measurements of Primary Organics and Their Oxidation Products over the Tropical Forests of Surinam. Atmos. Environment, 34, 1161-1165, 2000.

Williams, J., J. Roberts, S. B. Bertman, C. A. Stroud, F. C. Fehsenfeld, K. Baumann, M. P. Buhr, K. Knapp, P. C. Murphy, and M. Nowick: A method for the Airborne Measurement of PAN, PPN and MPAN. J. Geophys. Res., 105, D23, 28,943-28,960, 2000.

Williams, J., H. Fischer, G. W. Harris, P. J. Crutzen, P. Hoor, A. Hansel, R. Holzinger, C. Warneke, W. Lindinger, B. Scheeren, and J. Lelieveld: The variability-lifetime relationship for organic trace gases: a novel aid to compound identification and estimation of HO concentrations. J. Geophys. Res., 105, D16, 20,473, 2000.

Lee, Y.-N., X. Zhou, L. I. Kleinman, L. J. Nunnermacker, S. R. Springston, P. H. Daum, L. Newman, W. G. Keigley, M. W. Holdren, C. W. Spicer, V. Young, N. Fu, D. D. Parrish, J. Holloway, J. Williams, J. M. Roberts, T. B. Ryerson, and F. C. Fehesenfeld: Atmospheric chemistry and distribution of formaldehyde and several multioxygenated carbonyl compounds during the 1995 Nashville/Middle Tennessee Ozone Study. J. Geophys. Res., 103, No. D17, 22,449, 1998.

Roberts, J. M., J. Williams, K. Baumann, M. P. Buhr, P. D. Goldan, J. S. Holloway, G. Hübler, W. C. Kuster, S. McKeen, T. B. Ryerson, M. Trainer, E. J. Williams, F.C. Fehsenfeld, S. B. Bertman, G. Nouaime, C. Seaver, G. Grodzinsky, M. Rodgers, and V. L. Young: Measurements of PAN, PPN, and MPAN made during the 1994 and 1995 Nashville Intensives of the Southern Oxidant Study: Implications for regional ozone production from biogenic hydrocarbons. J. Geophys. Res. 103 , D17, 22,473, 1998.

Ryerson, T. B., M. P. Buhr, G. J. Frost, P. D. Goldan, J. S. Holloway, G. Hübler, B. T. Jobson , W. C. Kuster, S. A. McKeen, D. D. Parrish, J. M. Roberts, D. T. Sueper, M. Trainer, J. Williams, and F. C. Fehsenfeld: Emissions lifetimes and ozone formation in power plant plumes. J. Geophys. Res., 103, D17, 22,569, 1998.

Williams, J., J. M. Roberts, F. C. Fehsenfeld, S. B. Bertman, M. P. Buhr, P. D. Goldan, G. Hübler, W. C. Kuster, T. B. Ryerson, M. Trainer, and V. Young: Regional ozone from biogenic hydrocarbons deduced from airborne measurements of PAN, PPN and MPAN. Geophys. Res. Let., 24, 9, 1099, 1997.

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