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Influence of Arctic...
Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds
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- Christiansen, Sigurd (author)
- Århus Universitet,Aarhus University
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- Ickes, Luisa, 1986 (author)
- Stockholms universitet,Meteorologiska institutionen (MISU),Chalmers University of Technology, Sweden,Chalmers tekniska högskola,Stockholm University
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- Bulatovic, Ines (author)
- Stockholms universitet,Meteorologiska institutionen (MISU),Stockholm University
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- Leck, Caroline (author)
- Stockholms universitet,Meteorologiska institutionen (MISU),Stockholm University
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- Murray, Benjamin J. (author)
- University of Leeds
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- Bertram, Allan K. (author)
- University of British Columbia (UBC)
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- Wagner, Robert (author)
- Karlsruher Institut für Technologie (KIT),Karlsruhe Institute of Technology (KIT)
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- Gorokhova, Elena (author)
- Stockholms universitet,Institutionen för miljövetenskap,Stockholm University
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- Salter, Matthew E. (author)
- Stockholms universitet,Institutionen för miljövetenskap,Stockholm University
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- Ekman, Annica M. L. (author)
- Stockholms universitet,Meteorologiska institutionen (MISU),Stockholm University
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- Bilde, Merete (author)
- Århus Universitet,Aarhus University
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(creator_code:org_t)
- 2020
- 2020
- English.
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In: Journal of Geophysical Research: Atmospheres. - 2169-8996 .- 2169-897X. ; 125:19
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Abstract
Subject headings
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- As Arctic sea ice cover diminishes, sea spray aerosols (SSA) have a larger potential to be emitted into the Arctic atmosphere. Emitted SSA can contain organic material, but how it affects the ability of particles to act as cloud condensation nuclei (CCN) is still not well understood. Here we measure the CCN-derived hygroscopicity of three different types of aerosol particles: (1) Sea salt aerosols made from artificial seawater, (2) aerosol generated from artificial seawater spiked with diatom species cultured in the laboratory, and (3) aerosols made from samples of sea surface microlayer (SML) collected during field campaigns in the North Atlantic and Arctic Ocean. Samples are aerosolized using a sea spray simulation tank (plunging jet) or an atomizer. We show that SSA containing diatom and microlayer exhibit similar CCN activity to inorganic sea salt with a κ value of ∼1.0. Large-eddy simulation (LES) is then used to evaluate the general role of aerosol hygroscopicity in governing mixed-phase low-level cloud properties in the high Arctic. For accumulation mode aerosol, the simulated mixed-phase cloud properties do not depend strongly on κ, unless the values are lower than 0.4. For Aitken mode aerosol, the hygroscopicity is more important; the particles can sustain the cloud if the hygroscopicity is equal to or higher than 0.4, but not otherwise. The experimental and model results combined suggest that the internal mixing of biogenic organic components in SSA does not have a substantial impact on the cloud droplet activation process and the cloud lifetime in Arctic mixed-phase clouds.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- Arctic
- sea surface microlayer
- hygroscopicity
- mixed-phase clouds
- sea spray aerosol
- CCN
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Christiansen, Si ...
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Ickes, Luisa, 19 ...
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Bulatovic, Ines
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Leck, Caroline
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Murray, Benjamin ...
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Bertram, Allan K ...
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show more...
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Wagner, Robert
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Gorokhova, Elena
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Salter, Matthew ...
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Ekman, Annica M. ...
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Bilde, Merete
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Physical Chemist ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Climate Research
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
- Articles in the publication
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Journal of Geoph ...
- By the university
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Chalmers University of Technology
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Stockholm University