气候变化领域集成服务门户(CCPortal): Long-Term Trends for Marine Sulfur Aerosol in the Alaskan Arctic and Relationships With Temperature

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DOI	10.1029/2020JD033225
	Long-Term Trends for Marine Sulfur Aerosol in the Alaskan Arctic and Relationships With Temperature
	Moffett C.E.; Barrett T.E.; Liu J.; Gunsch M.J.; Upchurch L.M.; Quinn P.K.; Pratt K.A.; Sheesley R.J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:22
英文摘要	Marine aerosol plays a vital role in cloud-aerosol interactions during summer in the Arctic. The recent rise in temperature and decrease in sea ice extent have the potential to impact marine biogenic sources. Compounds like methanesulfonic acid (MSA) and non-sea-salt sulfate (nss-SO42−), oxidation products of dimethyl sulfide (DMS) emitted by marine primary producers, are likely to increase in concentration. Long-term studies are vital to understand these changes in marine sulfur aerosol and potential interactions with Arctic climate. Samples were collected over three summers at two coastal sites on the North Slope of Alaska (Utqiaġvik and Oliktok Point). MSA concentrations followed previously reported seasonal trends, with evidence of high marine primary productivity influencing both sites. When added to an additional data set collected at Utqiaġvik, an increase in MSA concentration of + 2.5% per year and an increase in nss-SO42− of + 2.1% per year are observed for the summer season over the 20-year record (1998–2017). This study identifies ambient air temperature as a strong factor for MSA, likely related to a combination of interrelated factors including warmer sea surface temperature, reduced sea ice, and temperature-dependent chemical reactions. Analysis of individual particles at Oliktok Point, within the North Slope of Alaska oil fields, showed evidence of condensation of MSA onto anthropogenic particles, highlighting the connection between marine and oil field emissions and secondary organic aerosol. This study shows the continued importance of understanding MSA in the Arctic while highlighting the need for further research into its seasonal relationship with organic carbon. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aerosol; Arctic; climate change; ocean-atmosphere interaction; sulfate
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/185646
作者单位	Department of Environmental Science, Baylor University, Waco, TX, United States; The Institute of Ecological, Earth, and Environmental Sciences, Baylor University, Waco, TX, United States; Now at Barrett Environmental, McKinney, TX, United States; Department of Chemistry, University of Michigan, Ann Arbor, MI, United States; Now at Merck & Co., Inc., Kenilworth, NJ, United States; Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, WA, United States; Pacific Marine Environmental Laboratories, National Oceanic and Atmospheric Administration, Seattle, WA, United States
推荐引用方式 GB/T 7714	Moffett C.E.,Barrett T.E.,Liu J.,et al. Long-Term Trends for Marine Sulfur Aerosol in the Alaskan Arctic and Relationships With Temperature[J],2020,125(22).
APA	Moffett C.E..,Barrett T.E..,Liu J..,Gunsch M.J..,Upchurch L.M..,...&Sheesley R.J..(2020).Long-Term Trends for Marine Sulfur Aerosol in the Alaskan Arctic and Relationships With Temperature.Journal of Geophysical Research: Atmospheres,125(22).
MLA	Moffett C.E.,et al."Long-Term Trends for Marine Sulfur Aerosol in the Alaskan Arctic and Relationships With Temperature".Journal of Geophysical Research: Atmospheres 125.22(2020).