Journal Article

PreJuSER-10074

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Intercomparison of cloud condensation nuclei and hygroscopic fraction the LACIS Experiment in November (LExNo)

Snider, J. R. ; Wex, H. ; Rose, D. ; Kristensson, A. ; Stratmann, F. ; Henning, T. ; Henning, S. ; Kiselev, A. ; Bilde, M. ; Burkhart, M. ; Dusek, U. ; Frank, G. P. ; Kiendler-Scharr, A.FZJ* ; Mentel, T. F.FZJ* ; Petters, M. D. ; Pöschl, U.

2010
Union Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/20485  doi:10.1029/2009JD012618

Abstract: Four cloud condensation nuclei (CCN) instruments were used to sample size-selected particles prepared at the Leipzig Aerosol Cloud Interaction Simulator facility. Included were two Wyoming static diffusion CCN instruments, the continuous flow instrument built by Droplet Measurement Technologies, and the continuous flow Leipzig instrument. The aerosols were composed of ammonium sulfate, levoglucosan, levoglucosan and soot, and ammonium hydrogen sulfate and soot. Comparisons are made among critical supersaturation values from the CCN instruments and derived from measurements made with a humidified tandem differential mobility system. The comparison is quite encouraging: with few exceptions the reported critical supersaturations agree within known experimental uncertainty limits. Also reported are CCN- and hygroscopicity-based estimates of the soot particles' solute fraction. Relative differences between these are as large as 40%, but an error analysis demonstrates that agreement within experimental uncertainty is achieved. We also analyze data from the Droplet Measurement Technologies and the two Wyoming static diffusion instruments for evidence of size distribution broadening and investigate levoglucosan particle growth kinetics in the Wyoming CCN instrument.

Keyword(s): J

Note: Several LExNo participants (G. Frank, A. Kiendler-Scharr, A. Kristensson, T. F. Mentel, D. Rose, J. Snider, and S. Walter) thank Atmospheric Composition Change: a European Network (ACCENT) for travel support. M. Bilde thanks the Nordic Center of Excellence, Research Unit BACCI, and Danish Natural Science Research Council for financial support. As a whole, the LExNo group thanks Simon Clegg. LExNo was hosted by the research group in Leipzig; their efforts were essential for bringing the study to fruition. The work of three reviewers is also acknowledged.

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Research Program(s):

1. Atmosphäre und Klima (P22)

Appears in the scientific report 2010

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Database coverage:
; JCR ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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