caa a22 4500 475823559 CHVBK 20180406123825.0 cr unu---uuuuu 170329e20000101xx s 000 0 eng 10.1023/A:1006250508562 doi (NATIONALLICENCE)springer-10.1023/A:1006250508562 Scavenging Efficiency of ‘Aerosol Carbon' and Sulfate in Supercooled Clouds at Mt. Sonnblick (3106 m a.s.l., Austria) [Elektronische Daten] [A. Kasper-Giebl, A. Koch, R. Hitzenberger, H. Puxbaum] Cloud water and interstitial aerosol samples collected at Mt. Sonnblick (SBO) were analyzed for sulfate and ‘aerosol carbon' to calculate in-cloud scavenging efficiencies. Scavenging efficiencies for sulfate (εSO) ranged from 0.52 to 0.99 with an average of 0.80. ‘Aerosol carbon' was scavenged less efficiently with an average value (εAC) of 0.45 and minimum and maximum values of 0.14 and 0.81, respectively. Both εSO and εAC showed a marked, but slightly different, dependence on the liquid water content (LWC) of the cloud. At low LWC, εSO increased with rising LWC until it reached a relatively constant value of 0.83 above an LWC of ≈ 0.3 g/m3. In the case of ‘aerosol carbon', we obtained a more gradual increase of εAC up to an LWC of ≈ 0.5 g/m3. At higher LWCs, ε_ remained relatively constant at 0.60. As the differences between εSO and εA varied across the LWC range observed at SBO, we assume that part of the ‘aerosol carbon' was incorporated into the cloud droplets independently from sulfate. This hypothesis is supported by size classified aerosol measurements. The differences in the size distributions of sulfate and total carbon point to a partially external mixture. Thus, the different chemical nature and the differences in the size and mixing state of the aerosol particles are the most likely candidates for the differences in the scavenging behavior. Kluwer Academic Publishers, 2000 scavenging efficiency nationallicence total carbon nationallicence aerosol carbon nationallicence sulfate nationallicence liquid water content nationallicence cloud water nationallicence Kasper-Giebl A. Institute for Analytical Chemistry, Vienna University of Technology, Getreidenmarkt 9/151, A-1060, Vienna, Austria aut Koch A. Institute for Analytical Chemistry, Vienna University of Technology, Getreidenmarkt 9/151, A-1060, Vienna, Austria aut Hitzenberger R. Institute for Experimental Physics, University of Vienna, Strudlhofgasse 9, A-1090, Vienna, Austria aut Puxbaum H. Institute for Analytical Chemistry, Vienna University of Technology, Getreidenmarkt 9/151, A-1060, Vienna, Austria aut Journal of Atmospheric Chemistry Kluwer Academic Publishers 35/1(2000-01-01), 33-46 0167-7764 35:1<33 2000 35 10874 https://doi.org/10.1023/A:1006250508562 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1006250508562 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kasper-Giebl A. Institute for Analytical Chemistry, Vienna University of Technology, Getreidenmarkt 9/151, A-1060, Vienna, Austria aut NATIONALLICENCE 700 1- Koch A. Institute for Analytical Chemistry, Vienna University of Technology, Getreidenmarkt 9/151, A-1060, Vienna, Austria aut NATIONALLICENCE 700 1- Hitzenberger R. Institute for Experimental Physics, University of Vienna, Strudlhofgasse 9, A-1090, Vienna, Austria aut NATIONALLICENCE 700 1- Puxbaum H. Institute for Analytical Chemistry, Vienna University of Technology, Getreidenmarkt 9/151, A-1060, Vienna, Austria aut NATIONALLICENCE 773 0- Journal of Atmospheric Chemistry Kluwer Academic Publishers 35/1(2000-01-01), 33-46 0167-7764 35:1<33 2000 35 10874 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer