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Model simulations of the annual cycle of the landfast ice thickness in the East Siberian Sea

ISSN号：1674-9928
期刊名称：Advances in Polar Science
时间：2015.2
页码：168-178
分类：P731.15[天文地球—海洋科学] P467[天文地球—大气科学及气象学]
作者机构：[1]Department of Basic Sciences, Shenyang Institute of Engineering, Shenyang 110136, China, [2]Department of Physics, University of Helsinki, Fi-00014 Helsinki, Finland, [3]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China, [4]Finnish Meteorological Institute, Fi-00101 Helsinki, Finland, [5]Beijing Normal University, Beijing100875, China, [6]Nansen International Environmental Remote Sensing Centre (NIERSC), Saint-Petersburg 199034, Russia
相关基金：supported by research funding from the National Natural Science Foundation of China (Grant nos. 41428603, 41376186, 41476170);the EU FP7 Project Eu Ru CAS(European-Russian Centre for Cooperation in the Arctic and Sub-Arctic Environmental and Climate Research,Grant no.295068);Academy of Finland (Grant nos. 11409391, 259537);the Liaoning Educational Committee Foundation (Grant no. L2013497);the Ocean Public Welfare Scientific Research Project of China (Grant nos. 201205007, 201205007-2)
相关项目：沿岸冰研究与冰工程 I

作者： Zhijun Li|Bin Cheng|Mengxi Zhai|Denis Demchev|

关键词：东西伯利亚, 海冰厚度, 模型模拟, 年周期, 海洋热通量, 最大厚度, 空气温度, 热力学模型, landfast sea ice, New Siberian Islands, ice growth, ice decay, oceanic heat flux, snow, albedo

中文摘要：

The annual cycle of the thickness and temperature of landfast sea ice in the East Siberian Sea has been examined using a one-dimensional thermodynamic model. The model was calibrated for the year August 2012–July 2013, forced using the data of the Russian weather station Kotel’ny Island and ECMWF reanalyses. Thermal growth and decay of ice were reproduced well, and the maximum annual ice thickness and breakup day became 1.64 m and the end of July. Oceanic heat flux was 2 W.m–2 in winter and raised to 25 W.m–2 in summer, albedo was 0.3–0.8 depending on the surface type(snow/ice and wet/dry). The model outcome showed sensitivity to the albedo, air temperature and oceanic heat flux. The modelled snow cover was less than 10 cm having a small influence on the ice thickness. In situ sea ice thickness in the East Siberian Sea is rarely available in publications. This study provides a method for quantitative ice thickness estimation by modelling. The result can be used as a proxy to understand the sea ice conditions on the Eurasian Arctic coast, which is important for shipping and high-resolution Arctic climate modelling.

英文摘要：

The annual cycle of the thickness and temperature of landfast sea ice in the East Siberian Sea has been examined using a one-dimensional thermodynamic model. The model was calibrated for the year August 2012-July 2013, forced using the data of the Russian weather station Kotel＇ny Island and ECMWF reanalyses. Thermal growth and decay of ice were reproduced well, and the maximum annual ice thickness and breakup day became 1.64 m and the end of July. Oceanic heat flux was 2 W.m^-2 in winter and raised to 25 W.m^-2 in summer, albedo was 0.3-0.8 depending on the surface type （snow/ice and wet/dry）. The model outcome showed sensitivity to the albedo, air temperature and oceanic heat flux. The modelled snow cover was less than 10 cm having a small influence on the ice thickness. In situ sea ice thickness in the East Siberian Sea is rarely available in publications. This study provides a method for quantitative ice thickness estimation by modelling. The result can be used as a proxy to understand the sea ice conditions on the Eurasian Arctic coast, which is important for shipping and high-resolution Arctic climate modelling.

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