极地研究 ›› 2011, Vol. 23 ›› Issue (2): 90-97.DOI: 10.3724/SP.J.1084.2011.00090

• 研究论文 • 上一篇    下一篇

海冰流变学方案对比模拟试验

刘喜迎1,2   

  1. 1中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室;
    2解放军理工大学气象学院
  • 收稿日期:2010-11-18 修回日期:2011-01-15 出版日期:2011-06-30 发布日期:2011-06-30
  • 通讯作者: 刘喜迎
  • 基金资助:

    国家自然科学基金;国家863计划项目

Experiments of simulation with different sea ice rheology

  • Received:2010-11-18 Revised:2011-01-15 Online:2011-06-30 Published:2011-06-30

摘要:

利用美国麻省理工学院开发的数值模式MITgcm设计了区域冰—洋耦合数值模拟试验,开展了海冰动力学过程中两种流变学方案(粘性—塑性流变学和弹性—粘性—塑性流变学)的对比研究。结果表明,两种方案模拟的海冰内部应力张量分量σ11和σ22总体分布形式相近。冬季,大值区主要位于加拿大北极群岛和格陵兰岛北侧以及格陵兰岛东侧靠近陆地海区。夏季,大值区主要位于加拿大北极群岛和格陵兰岛北侧。但σ12差别较大,可造成海冰相互作用力的明显差异。海冰相互作用力差值矢量在波弗特海区域呈逆时针涡旋分布而在北冰洋内部呈围绕北极点的顺时针涡旋分布,这导致海冰流速差异也出现相似的特点。

关键词: 海冰数值模拟

Abstract:

Experiments of regional sea ice-ocean coupled simulation are designed to study effects of sea ice rheology by using of the numerical model MITgcm developed by the Massachusetts Institute of Technology. Basing on simulation results, comparative analyses of effects of two rheology schemes, one is viscous-plastic rheology and another is elastic-viscous-plastic rheology, are carried out. It’s shown that, the major distribution patterns of components of internal stress σ11 and σ22 are similar in results of both schemes. In winter, the major areas with comparatively large values emerge mostly in ocean near lands north of the Canadian Arctic Archipelago and Greenland and east of Greenland. In summer, the major areas with comparatively large values emerge mostly north of the Canadian Arctic Archipelago and Greenland. There are big differences inσ12, which giving contribution to apparent differences in the force of sea ice interaction. The difference vector in sea ice interaction force shows anti-clockwise and clockwise features in the Beaufort Sea and the inner part of the Arctic Ocean respectively, which leading to similar features in difference of sea ice currents in the two places.

Key words: sea ice simulation

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