DOI: 10.1002/2017JC013693
Scopus记录号: 2-s2.0-85045937908
论文题名: Quantifying Growth of Pancake Sea Ice Floes Using Images From Drifting Buoys
作者: Roach L.A. ; Smith M.M. ; Dean S.M.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 4 起始页码: 2851
结束页码: 2866
语种: 英语
英文关键词: image processing
; in situ observations
; ocean waves
; sea ice
; sea ice floe size
; wave-ice interactions
英文摘要: New sea ice in the polar regions often begins as small pancake floes in autumn and winter that grow laterally and weld together into larger floes. However, conditions in polar oceans during freezeup are harsh, rendering in situ observations of small-scale sea ice growth processes difficult and infrequent. Here we apply image processing techniques to images obtained by drifting wave buoys (SWIFTs) deployed in the autumn Arctic Ocean to quantify these processes in situ for the first time. Small pancake ice floes were observed to form and grow gradually in freezing, low-wave conditions. We find that pancake floe diameters are limited by the wave field, such that floe diameter is proportional to wavelength and amplitude over time. Floe welding correlates well with sea ice concentration, and the observations can be used to estimate a key model parameter for floe size evolution. There is some agreement between observed lateral growth rates and those predicted using a theoretical model based on heat flux balance, but the model lateral growth rates are too conservative in these conditions. These results will be used to inform description of lateral floe growth and floe welding in new models that evolve sea ice floe size distribution. © 2018. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114163
Appears in Collections: 气候减缓与适应
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作者单位: National Climate Centre, National Institute of Water and Atmospheric Research, Wellington, New Zealand; School of Geography, Environment and Earth Sciences, Victoria University of Wellington, Wellington, New Zealand; Applied Physics Lab, University of Washington, Seattle, WA, United States
Recommended Citation:
Roach L.A.,Smith M.M.,Dean S.M.. Quantifying Growth of Pancake Sea Ice Floes Using Images From Drifting Buoys[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(4)