globalchange  > 气候减缓与适应
DOI: 10.1002/2017JD026733
Scopus记录号: 2-s2.0-85041061357
论文题名:
A 60 Year Record of Atmospheric Aerosol Depositions Preserved in a High-Accumulation Dome Ice Core, Southeast Greenland
作者: Iizuka Y.; Uemura R.; Fujita K.; Hattori S.; Seki O.; Miyamoto C.; Suzuki T.; Yoshida N.; Motoyama H.; Matoba S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期:1
起始页码: 574
结束页码: 589
语种: 英语
英文关键词: anthropogenic emission ; Greenland ; ice core ; nitrate ; postdepositional effect ; sulfate
Scopus关键词: accumulation ; aerosol ; aerosol composition ; anthropogenic source ; atmospheric deposition ; cold pool ; convective system ; dome ; emission ; hygroscopicity ; ice core ; nitrate ; precipitation intensity ; sulfate ; Arctic ; Greenland
英文摘要: The Southeastern Greenland Dome (SE-Dome) has both a high elevation and a high accumulation rate (1.01 m we yr−1), which are suitable properties for reconstructing past environmental changes with a high time resolution. For this study, we measured the major ion fluxes in a 90 m ice core drilled from the SE-Dome region in 2015 and present the records of annual ion fluxes from 1957 to 2014. From 1970 to 2010, the trend of nonsea-salt (nss) SO4 2− flux decreases, whereas that for NH4 + increases, tracking well with the anthropogenic SOx and NH3 emissions mainly from North America. The result suggests that these fluxes reflect histories of the anthropogenic SOx and NH3 emissions. In contrast, the decadal trend of NO3 − flux differs from the decreasing trend of anthropogenic NOx emissions. Although the cause of this discrepancy remains unclear, it may be related to changes in particle formation processes and chemical scavenging rates caused by an increase in sea salt and dust and/or a decrease in nssSO4 2−. We also find a high average NO3 − flux (1.13 mmol m−2 yr−1) in the ice core, which suggests a negligible effect from postdepositional NO3 − loss. Thus, the SE-Dome region is an excellent location for reconstructing nitrate fluxes. Over a decadal time scale, our NO3 − flux record is similar to those from other ice cores in Greenland high-elevation sites, suggesting that NO3 − concentration records from these ice cores are reliable. ©2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114708
Appears in Collections:气候减缓与适应

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作者单位: Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Department of Chemistry, Biology, and Marine Science, Faculty of Science, University of the Ryukyus, Nishihara, Japan; Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan; Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, Yokohama, Japan; Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Tokyo, Japan; Department of Earth and Environmental Sciences, Faculty of Science, Yamagata University, Yamagata, Japan; Earth-Life Science Institute, Tokyo Institute of Technology, Yokohama, Japan; National Institute of Polar Research, Tokyo, Japan

Recommended Citation:
Iizuka Y.,Uemura R.,Fujita K.,et al. A 60 Year Record of Atmospheric Aerosol Depositions Preserved in a High-Accumulation Dome Ice Core, Southeast Greenland[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(1)
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