Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds
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...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | https://doi.org/10.1029/2020JD032808 https://research.chalmers.se/en/publication/519814 |
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ftchalmersuniv:oai:research.chalmers.se:519814 2023-05-15T14:38:44+02:00 Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds Christiansen, Sigurd Ickes, Luisa Bulatovic, Ines Leck, Caroline Murray, Benjamin J. Bertram, Allan K. Wagner, Robert Gorokhova, Elena Salter, Matthew E. Ekman, Annica M.L. Bilde, Merete 2020 text https://doi.org/10.1029/2020JD032808 https://research.chalmers.se/en/publication/519814 unknown http://dx.doi.org/10.1029/2020JD032808 https://research.chalmers.se/en/publication/519814 Physical Chemistry Meteorology and Atmospheric Sciences Climate Research Arctic sea surface microlayer hygroscopicity mixed-phase clouds sea spray aerosol CCN 2020 ftchalmersuniv https://doi.org/10.1029/2020JD032808 2022-12-11T07:12:01Z 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. Other/Unknown Material Arctic Arctic Ocean North Atlantic Sea ice Chalmers University of Technology: Chalmers research Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Arctic Arctic Ocean Journal of Geophysical Research: Atmospheres 125 19 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Physical Chemistry Meteorology and Atmospheric Sciences Climate Research Arctic sea surface microlayer hygroscopicity mixed-phase clouds sea spray aerosol CCN |
spellingShingle |
Physical Chemistry Meteorology and Atmospheric Sciences Climate Research Arctic sea surface microlayer hygroscopicity mixed-phase clouds sea spray aerosol CCN Christiansen, Sigurd Ickes, Luisa Bulatovic, Ines Leck, Caroline Murray, Benjamin J. Bertram, Allan K. Wagner, Robert Gorokhova, Elena Salter, Matthew E. Ekman, Annica M.L. Bilde, Merete Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds |
topic_facet |
Physical Chemistry Meteorology and Atmospheric Sciences Climate Research Arctic sea surface microlayer hygroscopicity mixed-phase clouds sea spray aerosol CCN |
description |
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. |
author |
Christiansen, Sigurd Ickes, Luisa Bulatovic, Ines Leck, Caroline Murray, Benjamin J. Bertram, Allan K. Wagner, Robert Gorokhova, Elena Salter, Matthew E. Ekman, Annica M.L. Bilde, Merete |
author_facet |
Christiansen, Sigurd Ickes, Luisa Bulatovic, Ines Leck, Caroline Murray, Benjamin J. Bertram, Allan K. Wagner, Robert Gorokhova, Elena Salter, Matthew E. Ekman, Annica M.L. Bilde, Merete |
author_sort |
Christiansen, Sigurd |
title |
Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds |
title_short |
Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds |
title_full |
Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds |
title_fullStr |
Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds |
title_full_unstemmed |
Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds |
title_sort |
influence of arctic microlayers and algal cultures on sea spray hygroscopicity and the possible implications for mixed-phase clouds |
publishDate |
2020 |
url |
https://doi.org/10.1029/2020JD032808 https://research.chalmers.se/en/publication/519814 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Aitken Arctic Arctic Ocean |
geographic_facet |
Aitken Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean North Atlantic Sea ice |
genre_facet |
Arctic Arctic Ocean North Atlantic Sea ice |
op_relation |
http://dx.doi.org/10.1029/2020JD032808 https://research.chalmers.se/en/publication/519814 |
op_doi |
https://doi.org/10.1029/2020JD032808 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
125 |
container_issue |
19 |
_version_ |
1766310769147772928 |