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Thermodynamic properties of snow cover on sea ice during the austral summer in Prydz Bay, East Antarctica

ISSN号：2095-7874
期刊名称：《中国港湾建设》
时间：0
分类：P343.6[天文地球—水文科学;天文地球—地球物理学] O623.11[理学—有机化学;理学—化学]
作者机构：[1] State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China, [2] Polar Research Institute of China, Shanghai 200136, China
相关基金：supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(Grant no.51221961);the National Basic Research Program of China(Grant no.2010 CB950301);the International Science and Technology Cooperation Project(Grant no.2011DFA22260)

作者： HAN Hongwei[1], CHENG Peng[1], LI Zhijun[1], LEI Ruibo[2], LU Peng[1]

关键词：热力学性质, 东南极洲, 普里兹湾, 海冰, 积雪, 夏季, 空气温度, 密度相关, snow cover, temperature, density, summer, Antarctica

中文摘要：

The thermodynamic properties of snow cover on sea ice play a key role in the ice-ocean-atmosphere system and have been a focus of recent scientific research. In this study, we investigated the thermodynamic properties of snow cover on sea ice in the Nella Fjord, Prydz Bay, East Antarctica(69°20′S, 76°07′E), near the Chinese Antarctic Zhongshan Station. Our observations were carried out during the 29th Chinese National Antarctic Research Expedition. We found that the vertical temperature profile of snow cover changed considerably in response to changes in air temperature and solar radiation during the summer. Associated with the changes in the temperature profile were fluctuations in the temperature gradient within the upper 10 cm of the snow cover. Results of previous research have shown that the thermal conductivity of snow is strongly correlated with snow density. To calculate the thermal conductivity in this study, we measured densities in three snow pits. The calculated thermal conductivity ranged from 0.258–0.569 W?m-1?K-1. We present these datasets to show how involved parameters changed, and to contribute to a better understanding of melting processes in the snow cover on sea ice.

英文摘要：

The thermodynamic properties of snow cover on sea ice play a key role in the ice-ocean-atmosphere system and have been a focus of recent scientiifc research. In this study, we investigated the thermodynamic properties of snow cover on sea ice in the Nella Fjord, Prydz Bay, East Antarctica （69＆#176;20′S, 76＆#176;07′E）, near the Chinese Antarctic Zhongshan Station. Our observations were carried out during the 29th Chinese National Antarctic Research Expedition. We found that the vertical temperature proifle of snow cover changed considerably in response to changes in air temperature and solar radiation during the summer. Associated with the changes in the temperature proifle were lfuctuations in the temperature gradient within the upper 10 cm of the snow cover. Results of previous research have shown that the thermal conductivity of snow is strongly correlated with snow density. To calculate the thermal conductivity in this study, we measured densities in three snow pits. The calculated thermal conductivity ranged from 0.258-0.569 W？m-1？K-1. We present these datasets to show how involved parameters changed, and to contribute to a better understanding of melting processes in the snow cover on sea ice.

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