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DOI	10.1016/j.atmosenv.2020.117743
	Spatial variability of perchlorate in East Antarctic surface snow: Implications for atmospheric production
	Jiang S.; Cole-Dai J.; An C.; Shi G.; Yu J.; Sun B.
发表日期	2020
ISSN	13522310
卷号	238
英文摘要	Surface snow along a 1250-km transect from the coast to the East Antarctic ice sheet summit Dome Argus are used to investigate factors influencing spatial variability of perchlorate (ClO4−) production and deposition, and to explore contributions from tropospheric and stratospheric sources to ClO4− in Antarctic snow. The average ClO4− concentration of 104.3 ± 33.3 ng kg−1 is in the range of previously reported ClO4− concentrations in Antarctic snow, and one to two orders of magnitude higher than those in Arctic snow. The transect profile of ClO4− concentration shows relatively small spatial variability and no single consistent trend, with apparently high concentrations at locations with low accumulation rate. In the coastal region, strong correlation between ClO4− and troposphere-produced nitrate (NO3−) is observed. This may indicate that ClO4− in the coastal region is formed predominantly in the troposphere during summer, and the contribution from the stratosphere may be negligibly small. The lack of apparent correlation between ClO4− and NO3− in snow in interior East Antarctica suggests that a significant amount of ClO4− may be of stratospheric origin, with some tropospheric production. No significant correlation is found between sea-salt chloride (Cl−) and ClO4− in the coastal region, suggesting that tropospheric sea-salt Cl− is probably not an important precursor of ClO4− in snow in this region. In the inland Dome A region, part of Cl− might be converted into ClO4−. © 2020 Elsevier Ltd
英文关键词	Antarctic snow; Atmospheric production; Perchlorate; Spatial variability; Stratosphere; Troposphere
语种	英语
scopus关键词	Chlorine compounds; Coastal zones; Domes; Inorganic compounds; Troposphere; Accumulation rates; Antarctic surface snow; Coastal regions; East antarctic ice sheets; East antarctica; Orders of magnitude; Spatial variability; Strong correlation; Snow; chloride; nitrate; nitrogen oxide; perchlorate; snow; correlation; ice sheet; perchlorate; sea salt; stratosphere; transect; troposphere; Antarctica; arctic climate; Article; atmospheric deposition; ice sheet; precipitation; precursor; priority journal; stratosphere; summer; surface property; troposphere; Antarctica; Dome Argus; East Antarctica
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145026
作者单位	MNR Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai, 200136, China; Department of Chemistry and Biochemistry, South Dakota State University, Avera Health and Science Center, Box 2202, Brookings, SD 57007, United States; Key Laboratory of Geographic Information Science, School of Geographic Sciences and State Key Lab of Estuarine and Coastal Research, East China Normal University, Shanghai, 200241, China; School of Geography and Ocean Science, Nanjing University, Nanjing, 210023, China
推荐引用方式 GB/T 7714	Jiang S.,Cole-Dai J.,An C.,et al. Spatial variability of perchlorate in East Antarctic surface snow: Implications for atmospheric production[J],2020,238.
APA	Jiang S.,Cole-Dai J.,An C.,Shi G.,Yu J.,&Sun B..(2020).Spatial variability of perchlorate in East Antarctic surface snow: Implications for atmospheric production.Atmospheric Environment,238.
MLA	Jiang S.,et al."Spatial variability of perchlorate in East Antarctic surface snow: Implications for atmospheric production".Atmospheric Environment 238(2020).