DOI: 10.5194/tc-15-1321-2021
论文题名: Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19
作者: Lei R. ; Hoppmann M. ; Cheng B. ; Zuo G. ; Gui D. ; Cai Q. ; Jakob Belter H. ; Yang W.
刊名: Cryosphere
ISSN: 19940416
出版年: 2021
卷: 15, 期: 3 起始页码: 1321
结束页码: 1341
语种: 英语
英文关键词: atmosphere-ocean coupling
; atmospheric forcing
; biogeochemical cycle
; deformation
; heat transfer
; heterogeneity
; ice thickness
; kinematics
; momentum transfer
; sea ice
; seasonal variation
; spatiotemporal analysis
; Arctic Ocean
; Pacific Sector
; Southern Ocean
英文摘要: Arctic sea ice kinematics and deformation play significant roles in heat and momentum exchange between the atmosphere and ocean, and at the same time they have profound impacts on biological processes and biogeochemical cycles. However, the mechanisms regulating their changes on seasonal scales and their spatial variability remain poorly understood. Using position data recorded by 32 buoys in the Pacific sector of the Arctic Ocean (PAO), we characterized the spatiotemporal variations in ice kinematics and deformation for autumn-winter 2018/19, during the transition from a melting sea ice regime to a nearly consolidated ice pack. In autumn, the response of the sea ice drift to wind and inertial forcing was stronger in the southern and western PAO compared to the northern and eastern PAO. These spatial heterogeneities gradually weakened from autumn to winter, in line with the seasonal increases in ice concentration and thickness. Correspondingly, ice deformation became much more localized as the sea ice mechanical strength increased, with the area proportion occupied by the strongest (15 %) ice deformation decreasing by about 50 % from autumn to winter. During the freezing season, ice deformation rate in the northern PAO was about 2.5 times higher than in the western PAO and probably related to the higher spatial heterogeneity of oceanic and atmospheric forcing in the north. North-south and east-west gradients in sea ice kinematics and deformation within the PAO, as observed especially during autumn in this study, are likely to become more pronounced in the future as a result of a longer melt season, especially in the western and southern parts. © Author(s) 2021. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164738
Appears in Collections: 气候变化与战略
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作者单位: Key Laboratory for Polar Science of the Mnr, Polar Research Institute of China, Shanghai, China; Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany; Finnish Meteorological Institute, Helsinki, Finland; College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan, China; Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan, China; National Marine Environmental Forecasting Center of the Mnr, Beijing, China
Recommended Citation:
Lei R.,Hoppmann M.,Cheng B.,et al. Seasonal changes in sea ice kinematics and deformation in the Pacific sector of the Arctic Ocean in 2018/19[J]. Cryosphere,2021-01-01,15(3)