气候变化领域集成服务门户(CCPortal): Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds

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DOI	10.1029/2020JD032808
	Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds
	Christiansen S.; Ickes L.; Bulatovic I.; Leck C.; Murray B.J.; Bertram A.K.; Wagner R.; Gorokhova E.; Salter M.E.; Ekman A.M.L.; Bilde M.
发表日期	2020
ISSN	2169897X
卷号	125 期号:19
英文摘要	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. © 2020. The Authors.
英文关键词	Arctic; CCN; hygroscopicity; mixed-phase clouds; sea spray aerosol; sea surface microlayer
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185733
作者单位	Department of Chemistry, Aarhus University, Aarhus, Denmark; Department of Meteorology and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Department of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Sweden; Institute for Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Department of Chemistry, University of British Columbia, Vancouver, BC, Canada; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany; Department of Environmental Science, Stockholm University, Stockholm, Sweden
推荐引用方式 GB/T 7714	Christiansen S.,Ickes L.,Bulatovic I.,et al. Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds[J],2020,125(19).
APA	Christiansen S..,Ickes L..,Bulatovic I..,Leck C..,Murray B.J..,...&Bilde M..(2020).Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds.Journal of Geophysical Research: Atmospheres,125(19).
MLA	Christiansen S.,et al."Influence of Arctic Microlayers and Algal Cultures on Sea Spray Hygroscopicity and the Possible Implications for Mixed-Phase Clouds".Journal of Geophysical Research: Atmospheres 125.19(2020).