DOI: 10.1029/2017JC013692
Scopus记录号: 2-s2.0-85048090325
论文题名: An Emergent Sea Ice Floe Size Distribution in a Global Coupled Ocean-Sea Ice Model
作者: Roach L.A. ; Horvat C. ; Dean S.M. ; Bitz C.M.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 6 起始页码: 4322
结束页码: 4337
语种: 英语
英文关键词: Antarctic
; Artic
; floe size distribution
; lateral melt
; ocean-sea ice model
; sea ice
英文摘要: Sea ice is composed of discrete floes, which range in size across orders of magnitude. Here we present a model that represents the joint distribution of sea ice thickness and floe size. Unlike previous studies, we do not impose a particular form on the subgrid-scale floe size distribution. Floe sizes are determined prognostically by the interaction of five key physical processes: new ice formation, welding of floes in freezing conditions, lateral growth and melt, and fracture of floes by ocean surface waves. Coupled model results suggest that these processes capture first-order characteristics of the floe size distribution, including decay in the distribution with increasing floe size and basin-wide spatial variability in representative radius. Lateral melt and floe welding are particularly important, with wave fracture creating floes at preferred sizes. The addition of floe size dependence to the existing model physics results in significant reductions in sea ice concentration, particularly in summer and principally due to floe size-dependent lateral melt. The increased lateral melt alters partitioning of the melting potential, which reduces basal melt and increases sea ice thickness in some locations. These results suggest that including a floe size distribution may be important for accurate simulation of the polar climate system. © 2018 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113758
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
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; Institute at Brown for Environment and Society, Brown University, Providence, RI, United States; Atmospheric Sciences, University of Washington, Seattle, WA, United States
Recommended Citation:
Roach L.A.,Horvat C.,Dean S.M.,et al. An Emergent Sea Ice Floe Size Distribution in a Global Coupled Ocean-Sea Ice Model[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(6)