气候变化领域集成服务门户(CCPortal): Reconstruction of Sea Ice Concentration in Northern Baffin Bay Using Deuterium Excess in a Coastal Ice Core From the Northwestern Greenland Ice Sheet

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DOI	10.1029/2019JD031668
	Reconstruction of Sea Ice Concentration in Northern Baffin Bay Using Deuterium Excess in a Coastal Ice Core From the Northwestern Greenland Ice Sheet
	Kurosaki Y.; Matoba S.; Iizuka Y.; Niwano M.; Tanikawa T.; Ando T.; Hori A.; Miyamoto A.; Fujita S.; Aoki T.
发表日期	2020
ISSN	2169897X
卷号	125 期号:16
英文摘要	Variations in the conditions of sea ice in the northern part of Baffin Bay and North Open Water polynya influence human activity in northwestern Greenland through oceanic circulation and heat balance between air and sea. To evaluate the impact of variations in sea ice conditions on the surrounding environment, it is important to understand the mechanism of sea ice variations over long periods. In this study, we estimated the age of the SIGMA-A ice core collected northwestern Greenland Ice Sheet and researched the relationship between annual or seasonal deuterium excess (d-excess) and seasonal sea ice concentration. We found that a temporal variation in the spring d-excess in the ice core negatively correlated significantly with that of sea ice concentration in February–April in northern Baffin Bay from 1979–2005 (r = −0.61, p < 0.001). Using this relationship, we reconstructed the temporal variations in sea ice concentrations for 100 years from the ice core drilled in the northwestern Greenland Ice Sheet. The sea ice concentration in the early twentieth century was lower than that in the present. The decrease in sea ice concentration was consistent with analytical results for marine sediments obtained from Baffin Bay. We also suggested that the sea ice concentration was controlled by atmospheric conditions from the 1920s to 1940s based on examinations of correlations with the North Atlantic Oscillation index and air temperature in Ilulissat and by oceanographic conditions from 1945–1955, 1959–1969, and 1982–1992 based on the Atlantic Multidecadal Oscillation index and meridional heat transport to western Greenland. ©2020. The Authors.
英文关键词	d-excess; Greenland; ice core; isotope; sea ice; SIGMA
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/185825
作者单位	Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan; Institute of Low Temperature Science, Hokkaido University, Sapporo, Japan; Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan; Arctic Research Center, Hokkaido University, Sapporo, Japan; Kitami Institute of Technology, Kitami, Japan; Institute for the Advancement of Higher Education, Hokkaido University, Sapporo, Japan; National Institute of Polar Research, Tokyo, Japan
推荐引用方式 GB/T 7714	Kurosaki Y.,Matoba S.,Iizuka Y.,et al. Reconstruction of Sea Ice Concentration in Northern Baffin Bay Using Deuterium Excess in a Coastal Ice Core From the Northwestern Greenland Ice Sheet[J],2020,125(16).
APA	Kurosaki Y..,Matoba S..,Iizuka Y..,Niwano M..,Tanikawa T..,...&Aoki T..(2020).Reconstruction of Sea Ice Concentration in Northern Baffin Bay Using Deuterium Excess in a Coastal Ice Core From the Northwestern Greenland Ice Sheet.Journal of Geophysical Research: Atmospheres,125(16).
MLA	Kurosaki Y.,et al."Reconstruction of Sea Ice Concentration in Northern Baffin Bay Using Deuterium Excess in a Coastal Ice Core From the Northwestern Greenland Ice Sheet".Journal of Geophysical Research: Atmospheres 125.16(2020).