极地研究

极地研究 ›› 1995, Vol. 6 ›› Issue (2-English): 57-65.

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Temperature distribution of Collins Ice Cap,King George Island, Antarctica

 Han Jiankang1, Jin Huijun1, Wen Jiahong2 and Shang Xinchun3   

  1. 1Lanzhou Institute of  Glaciology and Geocryology, Academia Sinica, Lanzhou 730000, China 2Polar Research Institute of China, Shanghai 200129, China 3Department of Mechanics, Lanzhou University, Lanzhou 730000, China
  • 出版日期:1945-06-30 发布日期:1945-06-30
  • 通讯作者: Han Jiankang

Temperature distribution of Collins Ice Cap,King George Island, Antarctica

 Han Jiankang1, Jin Huijun1, Wen Jiahong2 and Shang Xinchun3   

  1. 1Lanzhou Institute of  Glaciology and Geocryology, Academia Sinica, Lanzhou 730000, China 2Polar Research Institute of China, Shanghai 200129, China 3Department of Mechanics, Lanzhou University, Lanzhou 730000, China
  • Online:1945-06-30 Published:1945-06-30
  • Contact: Han Jiankang

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摘要：

Temperature measurements in boreholes show that ice is of temperate state in accumulation area and of cold state in ablation area in Collins Ice Cap. Ice temperature of active layer is significantly influenced by seasonal variations of air temperature.The warming of ice by the melt water infiltration is remarkable. Snow cover also noticeably affects thermal regimes of the Collins Ice Cap. The measurements also reveal that temperature below the active layer is approximate to the melting point in the majority of the glacier except in the vicinity of the Little Dome,where ice temperature varies sharply within a surface distance of more than 10 metres. Significant water oozing from ice cores was observed at a depth of 30 m during the drilling near the Little Dome, which is probably caused by the combined effects such as internal runoffs,differential movement and high salinity of the glacier.

关键词: Collins Ice Cap, temperature, warm infiltration

Abstract:

Temperature measurements in boreholes show that ice is of temperate state in accumulation area and of cold state in ablation area in Collins Ice Cap. Ice temperature of active layer is significantly influenced by seasonal variations of air temperature.The warming of ice by the melt water infiltration is remarkable. Snow cover also noticeably affects thermal regimes of the Collins Ice Cap. The measurements also reveal that temperature below the active layer is approximate to the melting point in the majority of the glacier except in the vicinity of the Little Dome,where ice temperature varies sharply within a surface distance of more than 10 metres. Significant water oozing from ice cores was observed at a depth of 30 m during the drilling near the Little Dome, which is probably caused by the combined effects such as internal runoffs,differential movement and high salinity of the glacier.

Key words: Collins Ice Cap, temperature, warm infiltration