极地研究

极地研究 ›› 1991, Vol. 2 ›› Issue (2-English): 38-46.

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THERMAL PROPERTIES AND TEMPERATURE DISTRIBUTION OF SNOW/FIRN ON THE LAW DOWE ICE CAP, ANTARCTICA

 Ren Jiawen, Qin Dahe and Huang Maohuan   

  1. Lanzhou Institute of Glaciology and Geocryology, Chinese Academy of Sciences, Lanzhou 730000, China
  • 出版日期:1941-06-30 发布日期:1941-06-30
  • 通讯作者: Ren Jiawen

THERMAL PROPERTIES AND TEMPERATURE DISTRIBUTION OF SNOW/FIRN ON THE LAW DOME ICE CAP, ANTARCTICA

Ren Jiawen, Qin Dahe and Huang Maohuan   

  1. Lanzhou Institute of Glaciology and Geocryology, Chinese Academy of Sciences, Lanzhou 730000, China
  • Online:1941-06-30 Published:1941-06-30
  • Contact: Ren Jiawen

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摘要：

Based on detailed measurements of density and a numerous data on temperature in shallow bore holes (about 20m deep), the thermal properties and temperature distribution of snow/firn layer on the Law Dome ice cap, Antarctica, are discussed. According to a review of works on thermal properties of snow by Yen (1981), a relationship between thermal conductivity (K) and density (~) is proposed to be expressed by a formula, K=0.0784+2.697_(ρ~2). Then an eqation of heat transfer in a deformed ununiform medium is applied and solved analytically by two approaches. Comparison of calculated and measured temperatures indicates that the difference is mainly dependent on the determination of boundary donditions.

关键词: Law Dome Ice Cap, snow-firn layer, thermal properties, temperature distribution

Abstract:

Based on detailed measurements of density and a numerous data on temperature in shallow boreholes (about 20m deep), the thermal properties and temperature distribution of snow / firn layer on the Law Dome ice cap, Antarctica, are discussed. According to a review of works on thermal properties of snow by Yen (1981), a relationship between thermal conductivity (K) and density (ρ) is proposed to be expressed by a formula, K=0.0784+2.697/ρ2. Then an eqation of heat transfer in a deformed ununiform medium is applied and solved analytically by two approaches. Comparison of calculated and measured temperatures indicates that the difference is mainly dependent on the determination of boundary donditions.

Key words: Law Dome Ice Cap, snow-firn layer, thermal properties, temperature distribution