DOI: 10.1002/2017JC012865
Scopus记录号: 2-s2.0-85041530853
论文题名: Thin Sea Ice, Thick Snow, and Widespread Negative Freeboard Observed During N-ICE2015 North of Svalbard
作者: Rösel A. ; Itkin P. ; King J. ; Divine D. ; Wang C. ; Granskog M.A. ; Krumpen T. ; Gerland S.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 1156
结束页码: 1176
语种: 英语
英文关键词: Arctic
; sea ice
; sea-ice mass balance
; sea-ice thickness distribution
; snow
; snow on sea ice
Scopus关键词: buoy system
; ice cover
; ice thickness
; in situ measurement
; mass balance
; sea ice
; snow cover
; time series
; Arctic
; Arctic
; Arctic Ocean
; Svalbard
; Svalbard and Jan Mayen
英文摘要: In recent years, sea-ice conditions in the Arctic Ocean changed substantially toward a younger and thinner sea-ice cover. To capture the scope of these changes and identify the differences between individual regions, in situ observations from expeditions are a valuable data source. We present a continuous time series of in situ measurements from the N-ICE2015 expedition from January to June 2015 in the Arctic Basin north of Svalbard, comprising snow buoy and ice mass balance buoy data and local and regional data gained from electromagnetic induction (EM) surveys and snow probe measurements from four distinct drifts. The observed mean snow depth of 0.53 m for April to early June is 73% above the average value of 0.30 m from historical and recent observations in this region, covering the years 1955–2017. The modal total ice and snow thicknesses, of 1.6 and 1.7 m measured with ground-based EM and airborne EM measurements in April, May, and June 2015, respectively, lie below the values ranging from 1.8 to 2.7 m, reported in historical observations from the same region and time of year. The thick snow cover slows thermodynamic growth of the underlying sea ice. In combination with a thin sea-ice cover this leads to an imbalance between snow and ice thickness, which causes widespread negative freeboard with subsequent flooding and a potential for snow-ice formation. With certainty, 29% of randomly located drill holes on level ice had negative freeboard. © 2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114542
Appears in Collections: 气候减缓与适应
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作者单位: Norwegian Polar Institute, Tromsø, Norway; Alfred Wegener Institute, Bremerhaven, Germany
Recommended Citation:
Rösel A.,Itkin P.,King J.,et al. Thin Sea Ice, Thick Snow, and Widespread Negative Freeboard Observed During N-ICE2015 North of Svalbard[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)