Size-dependent ice nucleation by airborne particles during dust events in the eastern Mediterranean

Reicher N, Budke C, Eickhoff L, Raveh-Rubin S, Kaplan-Ashiri I, Koop T, Rudich Y (2019)
Atmospheric Chemistry and Physics (ACP) 19(17): 11143-11158.

Zeitschriftenaufsatz | Veröffentlicht| Englisch
 
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Autor/in
Reicher, Naama; Budke, CarstenUniBi; Eickhoff, LukasUniBi; Raveh-Rubin, Shira; Kaplan-Ashiri, Ifat; Koop, ThomasUniBi ; Rudich, Yinon
Abstract / Bemerkung
The prediction of cloud ice formation in climate models remains a challenge, partly due to the complexity of ice-related processes. Mineral dust is a prominent aerosol in the troposphere and is an important contributor to ice nucleation in mixed-phase clouds, as dust can initiate ice heterogeneously at relatively low supercooling conditions. We characterized the ice nucleation properties of size-segregated mineral dust sampled during dust events in the eastern Mediterranean. The sampling site allowed us to compare the properties of airborne dust from several sources with diverse mineralogy that passed over different atmospheric paths. We focused on particles with six size classes determined by the Micro-Orifice Uniform Deposit Impactor ( MOUDI) cutoff sizes: 5.6, 3.2, 1.8, 1.0, 0.6 and 0.3 mu m. Ice nucleation experiments were conducted in the Weizmann Supercooled Droplets Observation on a Microarray (WIS-DOM) setup, whereby the particles are immersed in nanoliter droplets using a microfluidics technique. We observed that the activity of airborne particles depended on their size class; supermicron and submicron particles had different activities, possibly due to different composition. The concentrations of ice-nucleating particles and the density of active sites (n(s)) increased with the particle size and particle concentration. The supermicron particles in different dust events showed similar activity, which may indicate that freezing was dominated by common mineralogical components. Combining recent data of airborne mineral dust, we show that current predictions, which are based on surface-sampled natural dust or standard mineral dust, overestimate the activity of airborne dust, especially for the submicron class. Therefore, we suggest in-cluding information on particle size in order to increase the accuracy of ice formation modeling and thus weather and climate predictions.
Erscheinungsjahr
2019
Zeitschriftentitel
Atmospheric Chemistry and Physics (ACP)
Band
19
Ausgabe
17
Seite(n)
11143-11158
ISSN
1680-7316
eISSN
1680-7324
Page URI
https://pub.uni-bielefeld.de/record/2937735

Zitieren

Reicher N, Budke C, Eickhoff L, et al. Size-dependent ice nucleation by airborne particles during dust events in the eastern Mediterranean. Atmospheric Chemistry and Physics (ACP) . 2019;19(17):11143-11158.
Reicher, N., Budke, C., Eickhoff, L., Raveh-Rubin, S., Kaplan-Ashiri, I., Koop, T., & Rudich, Y. (2019). Size-dependent ice nucleation by airborne particles during dust events in the eastern Mediterranean. Atmospheric Chemistry and Physics (ACP) , 19(17), 11143-11158. doi:10.5194/acp-19-11143-2019
Reicher, N., Budke, C., Eickhoff, L., Raveh-Rubin, S., Kaplan-Ashiri, I., Koop, T., and Rudich, Y. (2019). Size-dependent ice nucleation by airborne particles during dust events in the eastern Mediterranean. Atmospheric Chemistry and Physics (ACP) 19, 11143-11158.
Reicher, N., et al., 2019. Size-dependent ice nucleation by airborne particles during dust events in the eastern Mediterranean. Atmospheric Chemistry and Physics (ACP) , 19(17), p 11143-11158.
N. Reicher, et al., “Size-dependent ice nucleation by airborne particles during dust events in the eastern Mediterranean”, Atmospheric Chemistry and Physics (ACP) , vol. 19, 2019, pp. 11143-11158.
Reicher, N., Budke, C., Eickhoff, L., Raveh-Rubin, S., Kaplan-Ashiri, I., Koop, T., Rudich, Y.: Size-dependent ice nucleation by airborne particles during dust events in the eastern Mediterranean. Atmospheric Chemistry and Physics (ACP) . 19, 11143-11158 (2019).
Reicher, Naama, Budke, Carsten, Eickhoff, Lukas, Raveh-Rubin, Shira, Kaplan-Ashiri, Ifat, Koop, Thomas, and Rudich, Yinon. “Size-dependent ice nucleation by airborne particles during dust events in the eastern Mediterranean”. Atmospheric Chemistry and Physics (ACP) 19.17 (2019): 11143-11158.