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### 基于COUPMODEL模型的冻融土壤水热耦合模拟研究

1. 中国科学院青藏高原冰冻圈观测研究站 冰冻圈科学国家重点实验室 中国科学院寒区旱区环境与工程研究所, 甘肃 兰州 730000
• 收稿日期:2012-06-08 修回日期:2012-08-11 出版日期:2013-03-20 发布日期:2013-01-31
• 作者简介:

作者简介：胡国杰(1987-),男,甘肃武威人,博士研究生,主要从事冻土水热耦合及陆面过程模式研究。E-mail：huguojie123@126.com

• 基金资助:
国家自然科学基金项目（40830533,41271081,40871037,40901042,41271086）、中国科学院“百人计划”项目（51Y251571）、冰冻圈科学国家重点实验室自主课题（ SKLCS-ZZ-2010-03）资助

### The Water-thermal Characteristics of Frozen Soil Under Freeze-thaw Based on CoupModel

Guo-jie HU(), Lin ZHAO, Ren LI, Tong-hua WU, Yao XIAO, Ke-qin JIAO, Yong-ping QIAO, Yong-liang JIAO

1. Cryosphere Research Station on Qinghai-Xizang Plateau,Chinese Academy of Sciences, State Key Laboratory of Cryospheric Sciences,Lanzhou, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
• Received:2012-06-08 Revised:2012-08-11 Online:2013-03-20 Published:2013-01-31

Abstract:

To study the water-heat characteristics of soil in the active layer in high altitude permafrost regions and to examine the interaction between soil and moisture under freeze-thaw cycles, a physical process by the CoupModel was used to simulate the soil temperature and moisture in the active layer, using the meteorological, the soil thermal and the moisture data on different depths in the active layer at the Tanggula test site. Comparisons between simulated and monitored data in situ showed that: 1) for soil temperature in the active layer, the simulated results fit well with the monitored, and the determination coefficient (R2) is more than 0.94 with the mean value of 0.98 while mean square deviation is relatively small, implying the CoupModel could successfully simulate the soil temperatures. 2) For soil moisture, results generally reflect water content variation in the active layer with R2 ranging from 0.88 to 0.93, the mean is 0.90 and the mean square deviation is 4.24, indicating a bit poor accuracy compared to soil temperature. 3) As to the heat flux of soil within the depth of 0-20 cm, results simulated is consistent with the monitored. The simulation accuracy is improved with depths, which may be related to the depth from the natural ground surface. The frozen depth is about 3.0 m, which is close to the observed data. It is concluded that the CoupModel can be well applied to study soil water-heat characteristics of the active layer in permafrost regions with higher elevations in Qinghai-Tibet Plateau.

• P642.14