Parameter identification for volumetric heat capacity and thermal conductivity in a quasi-linear thermodynamic system of sea ice  

作　　者：Wei Lv 

机构地区：[1]Department of MathematicsShanghai University, Shanghai 200444, P. R. China

出　　处：《International Journal of Biomathematics》2016年第3期211-225,共15页生物数学学报（英文版）

摘　　要：This paper is intended to determine physical parameters describing volumetric heat capacity and thermal conductivity of sea ice in u quasi-linear thermodynamic system using field observations. The quasi-linear thermodynamic system of sea ice with unknown physical parameters is described, and the existence and uniqueness of its solution is proved. Then the physical parameters are taken as control variable, temperature devi- ations as objective function, and a parameter identification model is established. The existence of its optimal solution is discussed. To solve the identification model, a new algorithm containing genetic algorithm, Hooke- Jeeves algorithm and semi-implicit finite difference scheme is constructed. The physical parameters are calculated using the obser- vations measured at Nella Fjord around Zhongshan Station, Antarctic in CHINARE 2006. For comparability and consistency with other works, a new internationM standard named TEOS-10 is used. To examine the validity of the identified results, another sim- ulation for temperature profiles in different measurement period is operated. Numerical results show that better simulations of temperature distribution are possible with the identified parameters than EC1993. Therefore not only the identified parameters can be applied in sea ice modeling, but also this study can enrich and supplement observations of sea ice.

关 键 词：Parameter identification quasi-linear thermodynamic system volumetricheat capacity thermal conductivity sea ice. 

分 类 号：O414.1[理学—理论物理] TM411[理学—物理]