Preliminary results on relationship between thermal diffusivity and porosity of sea ice in the Antarctic

石立琼; 白乙拉; 李志军; 程斌; Leppranta Matti

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Preliminary results on relationship between thermal diffusivity and porosity of sea ice in the Antarctic

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摘要

The in situ sea-ice temperature,salinity and density observed from Chinese Antarctic Zhongshan Station have been applied to calculate the vertical profile of sea ice porosity.Based on numerical method,a number of schemes on sea-ice thermal diffusivity versus porosity have been accessed and one optimized scheme is identified by an optimal control model with an advanced distributing parameter system.For simplicity,the internal heating source item was neglected in the heat conduction equation during the identification procedure.In order to illustrate the applicability of this identified scheme,the vertical ice temperature profiles have been simulated and compared with measurements,respectively by using identified scheme and by classical thermodynamic formulae.The comparisons indicated that the scheme describing sea-ice thermal diffusivity and porosity is reasonable.In spite of a minor improvement of accuracy of results against in situ data,the identified scheme has a more physical meaning and could be used potentially in various applications.

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《极地科学进展：英文版》 |2009年第1期|72-80|共9页
作者
石立琼; 白乙拉; 李志军; 程斌; Leppranta Matti;
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作者单位

State Key Laboratory of Coastal and Offshore Engineering;

Dalian University of Technology;

Department of Mathematics;

Bohai University;

Finnish Meteorological Institute;

Department of Physics;

University of Helsinki;

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原文格式 PDF
正文语种 chi
中图分类物质的热性质;物理大地测量、重力测量与地球形状的测定;
关键词
南极中山站; 热扩散系数; 孔隙度; 海冰; 最优控制模型; 分布参数系统; 垂直剖面; 热传导方程;

机译：南极中山站;热扩散系数;孔隙度;海冰;最优控制模型;分布参数系统;垂直剖面;热传导方程;

Preliminary results on relationship between thermal diffusivity and porosity of sea ice in the Antarctic

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