Arctic sea ice volume export through the Fram Strait from combined satellite and model data： 1979–2012

• Published in: Acta oceanologica Sinica Vol. 36; no. 1; pp. 44 - 55
• Main Authors: Zhang, Zehua, Bi, Haibo, Sun, Ke, Huang, Haijun, Liu, Yanxia, Yan, Liwen
• Format: Journal Article
• Language: English
• Published: Beijing The Chinese Society of Oceanography 2017; Springer Nature B.V; The Key Laboratory of Marine Geology and Environment, Institute of 0ceanology, Chinese Academy of Sciences, Qingdao 266071, China%The First Institute of 0ceanography, State 0ceanic Administration, Qingdao 266061, China
• Subjects: Annual variations; Climatology; Earth and Environmental Science; Earth Sciences; Ecology; Engineering Fluid Dynamics; Environmental Chemistry; Fluctuations; Ice cover; Ice thickness; Ice volume; Marine & Freshwater Sciences; Oceanography; Outflow; Satellite observation; Satellites; Sea ice; Thickness; Trends; Winter; 体积流量; 冰上运动; 出口; 北极海冰; 卫星; 模型数据; 海冰厚度; 海峡; Arctic region; Fram Strait; sea ice volume flux; remote sensing; PIOMAS; Fram Strait
• ISSN: 0253-505X; 1869-1099
• DOI: 10.1007/s13131-017-0992-4

By combing satellite-derived ice motion and concentration with ice thickness fields from a popular model PIOMAS we obtain the estimates of ice volume flux passing the Fram Strait over the 1979–2012 period. Since current satellite and field observations for sea ice thickness are limited in time and space, the use of PIOMAS is expected to fill the gap by providing temporally continued ice thickness fields. Calculated monthly volume flux exhibits a prominent annual cycle with the peak record in March（roughly 145 km3/month） and the trough in August（10 km^3/month）. Annual ice volume flux（1 132 km^3） is primarily attributable to winter（October through May） outflow（approximately 92%）. Uncertainty in annual ice volume export is estimated to be 55 km^3（or 5.7%）. Our results also verified the extremely large volume flux appearing between late 1980 s and mid-1990 s. Nevertheless, no clear trend was found in our volume flux results. Ice motion is the primary factor in the determination of behavior of volume flux. Ice thickness presented a general decline trend may partly enhance or weaken the volume flux trend. Ice concentration exerted the least influences on modulating trends and variability in volume flux. Moreover, the linkage between winter ice volume flux and three established Arctic atmospheric schemes were examined. Compared to NAO, the DA and EOF3 mechanism explains a larger part of variations of ice volume flux across the strait.