| 影响多年冻土上限变化的因素探讨 |
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| 引用本文： | 王银学,赵林,李韧,吴通华,乔永平.影响多年冻土上限变化的因素探讨[J].冰川冻土,2011,33(5):1064-1067. |
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| 作者姓名： | 王银学 赵林 李韧 吴通华 乔永平 |
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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青藏高原冰冻圈观测研究站,甘肃兰州,730000 |
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| 基金项目： | 国家自然科学基金项目(40835033;40871037;40901042); 国家重点基础研究发展计划(973计划)项目(2007CB411504); 冰冻圈科学国家重点实验室自主课题(SKLCS-ZZ-2010-03)资助 |
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| 摘 要： | 利用地温及活动层水热观测资料,分析青藏公路沿线近年来影响多年冻土上限的变化因素.研究结果显示,青藏公路沿线冻土上限总体呈现下降趋势,冻土上限的变化与近年来区域气候变化的趋势一致;近年来多年冻土上限下降0.1～0.5 m,所处的地理位置不同,冻土上限下降的幅度也不同.气温变化是影响冻土上限的一个重要的外部因素,上限变化的...
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| 关 键 词： | 冻土上限 冻土环境 覆盖度 岩性 |
A Study of Factors Which Control Variation of Permafrost Table |
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| WANG Yin-xue,ZHAO Lin,LI Ren,WU Tong-hua,QIAO Yong-ping.A Study of Factors Which Control Variation of Permafrost Table[J].Journal of Glaciology and Geocryology,2011,33(5):1064-1067. |
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| Authors: | WANG Yin-xue ZHAO Lin LI Ren WU Tong-hua QIAO Yong-ping |
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| Institution: | WANG Yin-xue,ZHAO Lin,LI Ren,WU Tong-hua,QIAO Yong-ping(Cryosphere Research Station on Qinghai-Xizang Plateau,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou Gansu 730000,China) |
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| Abstract: | In this paper,factors which control the variation of permafrost table along the Qinghai-Tibet Highway were analyzed based on date of the active layers,borehole’s ground temperatures and hydrothermal observation.It is found that the permafrost table along the Qinghai-Tibet Highway has a decreasing tendency overall,consistent with the regional tendency climate change of recent years.Permafrost table has declined by 0.1～0.5 m dependent on geographical position.Air temperature change is one of the significant external factors which control the permafrost table.The extent of change of permafrost table is also limited by geographical environment and soil internal structures.The study of permafrost table changes aims to turning its control condition from natural to artificial,which is very important for engineering constructions. |
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| Keywords: | permafrost table permafrost environment coverage lithological characters |
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