Asymptotic analysis of subglacial plumes in stratified environments
Asymptotic analysis of subglacial plumes in stratified environments
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分层环境中冰下羽流的渐近分析
DOI:
10.1098/rspa.2021.0846
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Bradley A
中科院分区:
文献类型:
--
作者:
Bradley A
Accurate predictions of basal melt rates on ice shelves are necessary for precise projections of the future behaviour of ice sheets. The computational expense associated with completely resolving the cavity circulation using an ocean model makes this approach unfeasible for multi-century simulations, and parametrizations of melt rates are required. At present, some of the most advanced melt rate parametrizations are based on a one-dimensional approximation to the melt rate that emerges from the theory of subglacial plumes applied to ice shelves with constant basal slopes and uniform ambient ocean conditions; in this work, we present an asymptotic analysis of the corresponding equations in which non-constant basal slopes and typical ambient conditions are imposed. This analysis exploits the small aspect ratio of ice shelf bases, the relatively weak thermal driving and the relative slenderness of the region separating warm, salty water at depth and cold, fresh water at the surface in the ambient ocean. We construct an approximation to the melt rate that is based on this analysis, which shows good agreement with numerical solutions in a wide variety of cases, suggesting a path towards improved predictions of basal melt rates in ice-sheet models.
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影响因子:
5.2
作者:
Nakayama Yoshihiro;Cai Cilan;Seroussi Helene
通讯作者:
Seroussi Helene
影响因子:
18.3
作者:
Adusumilli S;Fricker HA;Medley B;Padman L;Siegfried MR
通讯作者:
Siegfried MR
DOI:
10.1146/annurev-fluid-010719-060252
发表时间:
2020
期刊:
--
影响因子:
--
作者:
I. Hewitt
通讯作者:
I. Hewitt
影响因子:
3.5
作者:
Petty A
通讯作者:
Petty A
影响因子:
2.9
作者:
Yun Xu;E. Rignot;D. Menemenlis;M. Koppes
通讯作者:
M. Koppes