INUIT - Research Project 2

Composition analysis of ice nuclei and ice particle residuals
combining aerosol mass spectrometry and counterflow
virtual impactor technique

(J. Schneider, MPIC, F. Stratmann, TROPOS)

Goals:
The objectives of this project is to analyze the physico-chemical properties of ice nuclei (IN), by:
   - direct sampling of ice residual from mixed phase cloud by a counterflow virtual
     impactor (Ice-CVI) with subsequent analysis by mass spectrometry and other
     methods;
   - combining an ice nuclei counter with a pumped counterflow virtual impactor
     (PCVI) and an aerosol mass spectrometer in order to anlalyze the particles that
     activated ice in the IN counter.

Field work:
   - INUIT-TO (Aug 2012)
   - INUIT-JFJ (Jan-Feb 2013)

Laboratory work:
   - Test campaign, TROPOS Leipzig, November 2012
   - LACIS campaign, TROPOS Leipzig, June 2013
   - FIN-1 (Fifth International Ice Nucleation Workshop, Part 1), AIDA, KIT, Germany, Nov. 2014

People:
J. Schneider, S. Schmidt, T. Klimach

Instrument:
ALABAMA

Results:

Schenk, L. P., Mertes, S., Kästner, U., Frank, F., Nillius, B., Bundke, U., Rose, D., Schmidt, S., Schneider, J., Worringen, A., Kandler, K., Bukowiecki, N., Ebert, M., Curtius, J., and Stratmann, F.: Characterization and first results of an ice nucleating particle measurement system based on counterflow virtual impactor technique, Atmos. Meas. Tech. Discuss., 7, 10585-10617, doi:10.5194/amtd-7-10585-2014, 2014.

Worringen, A., Kandler, K., Benker, N., Dirsch, T., Weinbruch, S., Mertes, S., Schenk, L., Kästner, U., Frank, F., Nillius, B., Bundke, U., Rose, D., Curtius, J., Kupiszewski, P., Weingartner, E., Schneider, J., Schmidt, S., and Ebert, M.: Single-particle characterization of ice-nucleating particles and ice particle residuals sampled by three different techniques, Atmos. Chem. Phys. Discuss., 14, 23027-23073, doi:10.5194/acpd-14-23027-2014, 2014.

Schmidt, S., Schneider, J., Klimach, T., Mertes, S., Schenk, L.P., Curtius, J, Kupiszewski, P., Hammer, E., Vochezer, P., Lloyd, G., Ebert, M., Kandler, K., Weinbruch, S, and Borrmann, S., In-situ single submicron particle composition analysis of ice residuals from mountain-top mixed-phase clouds in Central Europe, submitted to Atmos. Chem. Phys. Discuss., Nov. 2014