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The ice-nucleating activity of Arctic sea surface microlayer samples and marine algal cultures

Ickes, Luisa; Porter, Grace C. E.; Wagner, Robert; Adams, Michael P.; Bierbauer, Sascha; Bertram, Allan K.; Bilde, Merete; Christiansen, Sigurd; Ekman, Annica M. L.; Gorokhova, Elena; Höhler, Kristina; Kiselev, Alexei A.; Leck, Caroline; Möhler, Ottmar; Murray, Benjamin J.; Schiebel, Thea; Ullrich, Romy; Salter, Matthew E.

In recent years, sea spray as well as the biological material it contains has received increased attention as a source of ice-nucleating particles (INPs). Such INPs may play a role in remote marine regions, where other sources of INPs are scarce or absent. In the Arctic, these INPs can influence water–ice partitioning in low-level clouds and thereby the cloud lifetime, with consequences for the surface energy budget, sea ice formation and melt, and climate. Marine aerosol is of a diverse nature, so identifying sources of INPs is challenging. One fraction of marine bioaerosol (phytoplankton and their exudates) has been a particular focus of marine INP research. In our study we attempt to address three main questions. Firstly, we compare the ice-nucleating ability of two common phytoplankton species with Arctic seawater microlayer samples using the same instrumentation to see if these phytoplankton species produce ice-nucleating material with sufficient activity to account for the ice nucleation observed in Arctic microlayer samples. We present the first measurements of the ice-nucleating ability of two predominant phytoplankton species: Melosira arctica, a common Arctic diatom species, and Skeletonema marinoi, a ubiquitous diatom species across oceans worldwide. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000125503
Veröffentlicht am 23.11.2021
DOI: 10.5194/acp-20-11089-2020
Zitationen: 11
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Aerosolforschung (IMK-AAF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1680-7324
KITopen-ID: 1000125503
HGF-Programm 12.01.01 (POF III, LK 01) Clouds in a pertubed atmosphere
Weitere HGF-Programme 12.01.01 (POF III, LK 01) Clouds in a pertubed atmosphere
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 20
Heft 18
Seiten 11089–11117
Vorab online veröffentlicht am 29.09.2020
Schlagwörter Aerosol Arctic Ice nucleation
Nachgewiesen in Scopus
Web of Science
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