globalchange  > 气候减缓与适应
DOI: 10.1002/2017JC013251
Scopus记录号: 2-s2.0-85041301512
论文题名:
Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model
作者: Jordan J.R.; Holland P.R.; Goldberg D.; Snow K.; Arthern R.; Campin J.-M.; Heimbach P.; Jenkins A.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期:2
起始页码: 864
结束页码: 882
语种: 英语
英文关键词: buttressing ; coupled model ; ice shelf ; ice-ocean interactions ; parameterized melting
Scopus关键词: grounding line ; ice shelf ; ice-ocean interaction ; melting ; model validation ; parameterization ; pycnocline ; simulation ; western boundary current ; Massachusetts ; United States
英文摘要: The first fully synchronous, coupled ice shelf-ocean model with a fixed grounding line and imposed upstream ice velocity has been developed using the MITgcm (Massachusetts Institute of Technology general circulation model). Unlike previous, asynchronous, approaches to coupled modeling our approach is fully conservative of heat, salt, and mass. Synchronous coupling is achieved by continuously updating the ice-shelf thickness on the ocean time step. By simulating an idealized, warm-water ice shelf we show how raising the pycnocline leads to a reduction in both ice-shelf mass and back stress, and hence buttressing. Coupled runs show the formation of a western boundary channel in the ice-shelf base due to increased melting on the western boundary due to Coriolis enhanced flow. Eastern boundary ice thickening is also observed. This is not the case when using a simple depth-dependent parameterized melt, as the ice shelf has relatively thinner sides and a thicker central “bulge” for a given ice-shelf mass. Ice-shelf geometry arising from the parameterized melt rate tends to underestimate backstress (and therefore buttressing) for a given ice-shelf mass due to a thinner ice shelf at the boundaries when compared to coupled model simulations. © 2017. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114529
Appears in Collections:气候减缓与适应

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作者单位: British Antarctic Survey, Research Institute in Cambridge, Cambridge, United Kingdom; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Institute for Computational Engineering and Science, University of Texas at Austin, Austin, TX, United States

Recommended Citation:
Jordan J.R.,Holland P.R.,Goldberg D.,et al. Ocean-Forced Ice-Shelf Thinning in a Synchronously Coupled Ice-Ocean Model[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)
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