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《Journal of Glaciology and Geocryology》 2006-02
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Variation Pattern of Soil Water Content in Longitudinal Dune in the Southern Part of Gurbantünggüt Desert: How SnowMelt and Frozen Soil Change Affect the Soil Moisture

WANG Xue-qin~1, ZHANG Yuan-ming~1, JIANG Jin~1, CHEN Jun-jie~1,2, SONG Chun-wu~1,2(1.Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,rümqi Xinjiang 830011,China;2.Graduate University of Chinese Academy of Sciences,Beijing 100039,China)  
Based on the soil moisture on a longitudinal dune measured from March in 2004 to July 2005 and analyzing the weather station data in the southern part of Gurbantünggüt Desert,it is found that the spatial and temporal variations of soil moisture are mainly affected by snow melting and frozen soil changing.There is a stable snow cover with a depth of 20~30 cm on the dune surface during winter in the desert,it melts quickly in early spring and supplies water to soil,as a result,the spring becomes the richest season of soil moisture during a whole year.Again,there is a notable frozen soil layer in the desert,which melts from top to bottom in early spring.Under gravity,melting water moves from the dune crest downwards.Therefore,the soil moisture is high in interdune,medium on slope and little on crest in spring and early summer.This result provides the base for vegetation rehabilitation in desert.
【Fund】: 中国科学院知识创新工程项目(KZCX3-SW-343-3);; 新疆维吾尔自治区自然科学基金项目(200421128);; 中国科学院新疆生态与地理研究所绿洲学者"博士人才"培养计划项目资助
【CateGory Index】: S152.7
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