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DOI	10.5194/acp-22-15263-2022
	Atmospheric particle abundance and sea salt aerosol observations in thespringtime Arctic: a focus on blowing snow and leads
	Chen, Qianjie; Mirrielees, Jessica A.; Thanekar, Sham; Loeb, Nicole A.; Kirpes, Rachel M.; Upchurch, Lucia M.; Barget, Anna J.; Lata, Nurun Nahar; Raso, Angela R. W.; McNamara, Stephen M.; China, Swarup; Quinn, Patricia K.; Ault, Andrew P.; Kennedy, Aaron; Shepson, Paul B.; Fuentes, Jose D.; Pratt, Kerri A.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	15263
结束页码	15285
卷号	22 期号:23 页码:23
英文摘要	Sea salt aerosols play an important role in the radiation budget and atmospheric composition over the Arctic, where the climate is rapidly changing. Previous observational studies have shown that Arctic sea ice leads are an important source of sea salt aerosols, and modeling efforts have also proposed blowing snow sublimation as a source. In this study, size-resolved atmospheric particle number concentrations and chemical composition were measured at the Arctic coastal tundra site of Utqiagvik, Alaska, during spring (3 April-7 May 2016). Blowing snow conditions were observed during 25 % of the 5-week study period and were overpredicted by a commonly used blowing snow parameterization based solely on wind speed and temperature. Throughout the study, open leads were present locally. During periods when blowing snow was observed, significant increases in the number concentrations of 0.01-0.06 mu m particles (factor of 6, on average) and 0.06-0.3 mu m particles (67 %, on average) and a significant decrease (82 %, on average) in 1-4 mu m particles were observed compared to low wind speed periods. These size distribution changes were likely caused by the generation of ultrafine particles from leads and/or blowing snow, with scavenging of supermicron particles by blowing snow. At elevated wind speeds, both submicron and supermicron sodium and chloride mass concentrations were enhanced, consistent with wind-dependent local sea salt aerosol production. At moderate wind speeds below the threshold for blowing snow as well as during observed blowing snow, individual sea spray aerosol particles were measured. These individual salt particles were enriched in calcium relative to sodium in seawater due to the binding of this divalent cation with organic matter in the sea surface microlayer and subsequent enrichment during seawater bubble bursting. The chemical composition of the surface snowpack also showed contributions from sea spray aerosol deposition. Overall, these results show the contribution of sea spray aerosol production from leads on both aerosols and the surface snowpack. Therefore, if blowing snow sublimation contributed to the observed sea salt aerosol, the snow being sublimated would have been impacted by sea spray aerosol deposition rather than upward brine migration through the snowpack. Sea spray aerosol production from leads is expected to increase, with thinning and fracturing of sea ice in the rapidly warming Arctic.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000892959000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273319
作者单位	University of Michigan System; University of Michigan; Pennsylvania Commonwealth System of Higher Education (PCSHE); Pennsylvania State University; Pennsylvania State University - University Park; University of North Dakota Grand Forks; National Oceanic Atmospheric Admin (NOAA) - USA; University of Washington; University of Washington Seattle; United States Department of Energy (DOE); Pacific Northwest National Laboratory; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Purdue University System; Purdue University; Purdue University West Lafayette Campus; Purdue University System; Purdue University; Purdue University West Lafayette Campus; University of Michigan System; University of Michigan; Hong Kong Polytechnic University; State University of New York (SUNY) System; State University of New York (SUNY) Stony Brook; University of Manitoba
推荐引用方式 GB/T 7714	Chen, Qianjie,Mirrielees, Jessica A.,Thanekar, Sham,et al. Atmospheric particle abundance and sea salt aerosol observations in thespringtime Arctic: a focus on blowing snow and leads[J],2022,22(23):23.
APA	Chen, Qianjie.,Mirrielees, Jessica A..,Thanekar, Sham.,Loeb, Nicole A..,Kirpes, Rachel M..,...&Pratt, Kerri A..(2022).Atmospheric particle abundance and sea salt aerosol observations in thespringtime Arctic: a focus on blowing snow and leads.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(23),23.
MLA	Chen, Qianjie,et al."Atmospheric particle abundance and sea salt aerosol observations in thespringtime Arctic: a focus on blowing snow and leads".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.23(2022):23.