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Spatiotemporal characteristics of sea ice transport in the Baffin Bay and its association with atmospheric variability

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Acta Oceanologica Sinica 2021年第3期40卷 1-17页

作者： Weifu Sun Haibo Bi Min Fu Xi Liang Yunhe Wang Yu Liang Jue Huang Haijun Huang Liwen Yan Qinglong Yu Shuang Liang Oceanic Telemetry Engineering and Technology Innovation Center First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266037China Center for Ocean Mega-Science&Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China National Marine Environmental Forecasting Center Beijing 100081China University of Chinese Academy of Sciences Beijing 100049China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094China College of Geodesy and Geomatics Shandong University of Sicence and TechnologyQingdao 266590China

sea ice export through the Baffin Bay plays a vital role in modulating the sea ice cover variability in the Labrador *** this study,satellite-derived sea ice products are used to obtain the sea ice area flux(SIAF)through the three passages in the Baffin Bay(referred to as A,B,and C for the north,middle,and south passages,respectively).The spatial variability of the monthly sea ice drift in the Baffin Bay is *** interannual variability and trends in SIAF via the three passages are *** connection to several large-scale atmospheric circulation modes is *** the period of 1988-2015,the average annual(October to the following September)SIAF amounts to 555×10^(3) km^(2),642×10^(3) km^(2),and 551×10^(3) km^(2) through Passages A,B,and C,*** quantities are less than that observed through the Fram Strait(FS,707×10^(3) km^(2))of the corresponding *** positive trends in annual SIAF,on the order of 53.1×10^(3) km^(2)/(10 a)and 43.2×10^(3) km^(2)/(10 a)(significant at the 95%confidence level),are identified at Passages A and B,*** trend of the south passage(C),however,is slightly negative(-13.3×10^(3) km^(2)/(10 a),not statistically significant).The positive trends in annual SIAF through the Passages A and B are primarily attributable to the significant increases after *** connection between the Baffin Bay sea ice export and the North Atlantic Oscillation is not significant over the studied *** contrast,the association with the cross-gate sea level pressure difference is robust in the Baffin Bay(R equals 0.69 to 0.71,depending on the passages considered),but relatively weaker than that over FS(R=0.74).

关键词： sea ice transport Baffin Bay Arctic sea ice area flux(SIAF)

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