| Snow water content estimation from measured snow temperature |
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| 作者姓名： | 李志军 赵海清 冯恩民 程斌 卢鹏 |
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| 作者单位： | State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology，Department of mathematics and Physics，Dalian Jiaotong University，Department of Applied Mathematics，Dalian University of Technology，Finnish Institute of Marine Research，Helsinki FIN-00931，Finland，State Key Laboratory of Coastal and Offshore Engineering，Dalian University of Technology，Dalian 116024，China，Dalian 116028，China，Dalian 116024，China，Dalian 116024，China |
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| 基金项目： | the Ministry of Finance of China, organized by the Chinese Arctic and Antarctic Administration
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国家自然科学基金 |
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| 摘 要： | The vertical temperature profiles of snow and sea ice have been measured in the Arctic during the 2nd Chinese National Arctic Research Expedition in 2003(CHINARE2003).The high-resolution temperature profile in snow is solved by one-dimensional heat transfer equation.The effective heat diffusivity,internal heat sources are identified.The internal heat source refers to the penetrated solar radiation which usually warms the lower part of the snow layer in summer.By temperature gradient analysis,the zero level can be clarified quantitatively as the boundary of the dry and wet snow.According to the in situ time series of vertical temperature profile,the time series of water content in snow is obtained based on an evaluation method of snow water content associated with the snow and ice physical parameters.The relationship of snow water content and snow temperature and temporal-spatial distribution of snow water content are presented
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Snow water content estimation from measured snow temperature |
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| Li Zhijun,Zhao Haiqing,Feng Enmin,Cheng Bin,Lu Peng.Snow water content estimation from measured snow temperature[J].Chinese Journal of Polar Science,2007,18(1):1-7. |
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| Authors: | Li Zhijun Zhao Haiqing Feng Enmin Cheng Bin Lu Peng |
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| Abstract: | The vertical temperature profiles of snow and sea ice have been measured in the Arctic during the 2nd Chinese National Arctic Research Expedition in 2003 (CHINARE2003). The high-resolution temperature profile in snow is solved by one-dimensional heat transfer equation. The effective heat diffusivity, internal heat sources are identified. The internal heat source refers to the penetrated solar radiation which usually warms the lower part of the snow layer in summer. By temperature gradient analysis, the zero level can be clarified quantitatively as the boundary of the dry and wet snow. According to the in situ time series of vertical temperature profile, the time series of water content in snow is obtained based on an evaluation method of snow water content associated with the snow and ice physical parameters. The relationship of snow water content and snow temperature and temporal-spatial distribution of snow water content are presented |
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| Keywords: | Arctic sea ice snow water content temperature snow and ice estimation relationship distribution based evaluation method of water content associated physical parameters in situ time series zero level boundary gradient analysis heat source solar radiation |
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