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

查看全文 作　　者：Weifu [1]Sun;Haibo [2,3]Bi;Min [4]Fu;Xi [4]Liang;Yunhe [3]Wang;Yu [3,5]Liang;Jue [7]Huang;Haijun [3,5]Huang;Liwen [3,5]Yan;Qinglong [4]Yu;Shuang [6]Liang

机构地区：[1]Oceanic Telemetry Engineering and Technology Innovation Center,First Institute of Oceanography,Ministry of Natural Resources,Qingdao 266061,China;[2]Laboratory for Marine Geology,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao 266037,China;[3]Center for Ocean Mega-Science&Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;[4]National Marine Environmental Forecasting Center,Beijing 100081,China;[5]University of Chinese Academy of Sciences,Beijing 100049,China;[6]Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;[7]College of Geodesy and Geomatics,Shandong University of Sicence and Technology,Qingdao 266590,China

出　　处：《Acta Oceanologica Sinica》索引2021年第40卷第3期,共17页

基　　金：The National Key Research and Development Program of China under contract Nos 2016YFA0600102,2017YFC1405106,2016YFC1402707,and 2019YFE0114800;the General Project of Natural Science Foundation of Shandong Province under contract No.ZR2020MD100;the Key Deployment Project of Centre for Ocean Mega Science,Chinese Academy of Sciences,under contract No.COMS2020Q12;the National Natural Science Foundation of China under contract Nos 42076185 and 41406215;the Open Fund for the Key Laboratory of Marine Geology and Environment,Institute of Oceanology,Chinese Academy of Sciences under contract No.MGE2020KG04;the Key R&D Project of Shandong Province under contract No.2019GSF111017;the NSFCShandong Joint Fund for Marine Science Research Centers under contract No.U1606401. 摘　　要：Sea ice export through the Baffin Bay plays a vital role in modulating the sea ice cover variability in the Labrador Sea.In 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 presented.The interannual variability and trends in SIAF via the three passages are outlined.The connection to several large-scale atmospheric circulation modes is assessed.Over 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,respectively.These quantities are less than that observed through the Fram Strait(FS,707×10^(3) km^(2))of the corresponding period.The 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,respectively.The 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 2000.The connection between the Baffin Bay sea ice export and the North Atlantic Oscillation is not significant over the studied period.By 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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Spatiotemporal characteristics of sea ice transport in the Baffin Bay and its association with atmospheric variability

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