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Ice nucleating particles in the Saharan Air Layer

Boose, Y.; Sierau, B.; Isabel García, M.; Rodríguez, S.; Alastuey, A.; Linke, C.; Schnaiter, M.; Kupiszewski, P.; Kanji, Z.A.; Lohmann, U.

This study aims at quantifying the ice nucleation properties of desert dust in the Saharan Air Layer (SAL), the warm, dry and dust-laden layer that expands from North Africa to the Americas. By measuring close to the dust’s emission source, before aging processes during the transatlantic advection potentially modify the dust properties, the study fills a gap between in situ measurements of dust ice nucleating particles (INPs) far away from the Sahara and laboratory studies of ground-collected soil. Two months of online INP concentration measurements are presented, which were part of the two CALIMA campaigns at the Izaña observatory in Tenerife, Spain (2373ma.s.l.), in the summers of 2013 and 2014. INP concentrations were measured in the deposition and condensation mode at temperatures between 233 and 253K with the Portable Ice Nucleation Chamber (PINC). Additional aerosol information such as bulk chemical composition, concentration of fluorescent biological particles as well as the particle size distribution was used to investigate observed variations in the INP concentration.
The concentration of INPs was found to range between 0.2 std L$^{-1}$ in the deposition mode and up to 2500 std L$^{-1}$ in the condensation mode at 240 K. ... mehr

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DOI: 10.5445/IR/1000058682
DOI: 10.5194/acp-16-9067-2016
Zitationen: 56
Zitationen: 60
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Aerosolforschung (IMK-AAF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2016
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
KITopen-ID: 1000058682
HGF-Programm 12.01.01 (POF III, LK 01) Clouds in a pertubed atmosphere
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 16
Heft 14
Seiten 9067-9087
Nachgewiesen in Dimensions
Web of Science
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