| 青藏高原普若岗日冰原80m深冰层温度变化分析 |
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| 引用本文： | 蒲健辰,姚檀栋,王宁练,段克勤,朱国才,杨梅学.青藏高原普若岗日冰原80m深冰层温度变化分析[J].冰川冻土,2002,24(3):282-286. |
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| 作者姓名： | 蒲健辰 姚檀栋 王宁练 段克勤 朱国才 杨梅学 |
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| 作者单位： | 中国科学院, 寒区旱区环境与工程研究所冰芯与寒区环境重点实验室, 甘肃, 兰州, 730000 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);G1998040811和G1998040812; |
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| 摘 要： | 2000年10月在普若岗日冰原海拔6000m处的80m深冰芯孔中,利用热敏电阻温度计测量了冰层温度.结果显示,所有温度曲线除2m深度以上表层温度已受到低温冷波强烈干扰开始转型外,主要曲线均表现为暖季型.最低冰温度-9.9℃,出现在12m深度处.以12m深度为界,上部冰层温度变幅大,下部冰温随深度增加基本呈直线型升高,温度梯度较上部小.观测期间,4m之上冰温随时间逐渐降低,其降幅随深度增加而逐渐减小.最大日降低幅度在0.m处达0.62℃,1m处为0.3℃,2m处为0.20℃.据冰层温度状况和气候条件,普若岗日冰原应属极大陆型冰川.
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| 关 键 词： | 冰层温度 冰温变化 普若岗日冰原 |
| 文章编号： | 1000-0240(2002)03-0282-05 |
| 收稿时间： | 2001-11-11 |
| 修稿时间： | 2001年11月11日 |
The Distribution of 80-m Ice Temperature in Puruogangri Ice Field on the Tibetan Plateau |
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| PU Jian chen,YAO Tan dong,WANG Ning lian,DUAN Ke qin,ZHU Guo cai,YANG Mei xue.The Distribution of 80-m Ice Temperature in Puruogangri Ice Field on the Tibetan Plateau[J].Journal of Glaciology and Geocryology,2002,24(3):282-286. |
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| Authors: | PU Jian chen YAO Tan dong WANG Ning lian DUAN Ke qin ZHU Guo cai YANG Mei xue |
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| Institution: | Key Laboratory of Ice Core and Cold Regions Environment, CAREERI, CAS, Lanzhou Gansu 730000, China |
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| Abstract: | Ice temperature observation in an ice core hole, 80 m deep, was made in Puruogangri Ice Field (6000 m a.s.l.) in October 2000 by using a thermal resistor thermometers. The observation shows that ice temperature variability in the top 2 m was dramatic under the influence of cold wave, and exhibited an abrupt change in temperature at the depth of 12 m, where the lowest temperature, around -9.9℃, appeared. The observation suggests a positive temperature gradient in the upper 12 m and a negative gradient in the lower 68 m. Ice temperature increases linearly from 12 m to 80 m deep, with a temperature gradient smaller than that in the upper 12 m deep. Ice temperature decreased in the upper 4 m during the observation, with amplitude decreasing with depth. Temperature decreased daily 0.62℃ at 0.5 m deep, 0.35℃ at 1 m deep and 0.2℃ at 2 m deep, suggesting winter cold wave being to diffuse downward, especially in the upper 2 m. However, ice temperature in the deep is mainly influenced and disturbed by geothermal heat and upward thermal diffusion. Puruogangri Ice Field is classified as an extra continent glacier due to its ice temperature. It is found that the lowest ice temperature center appears in the hinterland of the Tibetan Plateau. Ice temperature increases gradually outwards from the center. |
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| Keywords: | ice temperature variability of ice temperature Puruogangri Ice Field |
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