Sea ice-ocean coupling using a rescaled vertical coordinate z*

被引：70

作者：

Campin, Jean-Michel ^{[1
]}

Marshall, John ^{[1
]}

Ferreira, David ^{[1
]}

机构：

[1] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA

来源：

OCEAN MODELLING | 2008年 / 24卷 / 1-2期

关键词：

ocean model; sea ice model; free-surface; vertical coordinate;

D O I：

10.1016/j.ocemod.2008.05.005

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

Realistic representation of sea ice in ocean models involves the use of a non-linear free-surface, a real freshwater flux and observance of requisite conservation laws. We show here that these properties can be achieved in practice through use of a rescaled vertical coordinate "z*" in z-coordinate models that allows one to follow undulations in the free-surface under sea ice loading. In particular, the adoption of "z*" avoids the difficult issue of vanishing levels under thick ice. Details of the implementation within MITgcm are provided. A high resolution global ocean sea ice simulation illustrates the robustness of the z* formulation and reveals a source of oceanic variability associated with sea ice dynamics and ice-loading effects. The use of the z* coordinate allows one to achieve perfect conservation of fresh water, heat and salt, as shown in extended integration of coupled ocean sea ice atmospheric model. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1 / 14

页数：14

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