| 青藏高原热融湖塘的水热过程及其对下伏多年冻土的热影响 |
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| 引用本文： | 胡晓莹,盛煜,吴吉春,李静,曹伟.青藏高原热融湖塘的水热过程及其对下伏多年冻土的热影响[J].湖泊科学,2018,30(3):825-835. |
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| 作者姓名： | 胡晓莹 盛煜 吴吉春 李静 曹伟 |
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| 作者单位： | 中国科学院西北生态环境资源研究院冻土工程国家重点实验室;中国科学院大学 |
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| 基金项目： | 国家重大科学研究计划项目（91647103）、中国科学院重点部署项目（KZZD-EW-13）和国家自然科学基金项目（41501079）联合资助. |
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| 摘 要： | 以青藏高原查拉坪地区一处热融湖塘(40 m×50 m,最大深度为1 m)为研究对象,由实测数据对比分析了热融湖塘与天然地表相同深度的温度变化特征.结果表明:与天然地表相比,热融湖塘融化时间长,冻结时间短,且存在接近4℃的水温变化;受太阳辐射及热对流的影响,垂向水温梯度仅在水表从4℃降温及冻结阶段较大,其余时段接近0;湖底年均温度比相同深度的天然地表高约6.4℃,湖底下部存在约14 m深随时间发展的融区,土体吸热增大,放热减小;热融湖塘2.5~3.0 m土体的年内热交换为19592.0 k J/m2,约是天然地表的230倍,其中吸热量及放热量分别为后者的1.4倍及8.7%.湖塘下部的融化夹层是深层冻土的主要热源,湖塘对下部土体放热的抑制作用是湖塘对土体产生热影响的主要原因.
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| 关 键 词： | 热融湖塘 水热过程 地温梯度 融化夹层 热交换 青藏高原 |
| 收稿时间： | 2017/5/10 0:00:00 |
| 修稿时间： | 2017/9/16 0:00:00 |
Hydrothermal processes of thermokarst ponds in the Tibetan Plateau and its thermal impact on the underlying permafrost |
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| HU Xiaoying,SHENG Yu,WU Jichun,LI Jing and CAO Wei.Hydrothermal processes of thermokarst ponds in the Tibetan Plateau and its thermal impact on the underlying permafrost[J].Journal of Lake Science,2018,30(3):825-835. |
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| Authors: | HU Xiaoying SHENG Yu WU Jichun LI Jing and CAO Wei |
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| Institution: | State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, P. R. China;University of Chinese Academy of Sciences, Beijing 100049, P. R. China,State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, P. R. China,State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, P. R. China,State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, P. R. China and State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, P. R. China |
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| Abstract: | |
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| Keywords: | Thermokarst pond hydrothermal processes gradient of ground temperature talik heat exchange Tibetan Plateau |
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