| 古尔班通古特沙漠南部沙垄水分动态--兼论积雪融化和冻土变化对沙丘水分分异作用 |
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| 引用本文： | 王雪芹,张元明,蒋进,陈均杰,宋春武.古尔班通古特沙漠南部沙垄水分动态--兼论积雪融化和冻土变化对沙丘水分分异作用[J].冰川冻土,2006,28(2):262-268. |
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| 作者姓名： | 王雪芹 张元明 蒋进 陈均杰 宋春武 |
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| 作者单位： | 1. 中国科学院,新疆生态与地理研究所,新疆,乌鲁木齐,830011
2. 中国科学院,新疆生态与地理研究所,新疆,乌鲁木齐,830011;中国科学院,研究生院,北京,100039 |
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| 基金项目： | 中国科学院知识创新工程项目
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新疆自然科学基金
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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 |
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| 摘 要： | 2004年3月至2005年7月对古尔班通古特沙漠南部典型半固定沙垄土壤水分进行了系统监测,结合气象资料,特别是对冬季积雪和冻土资料的分析,认为该沙漠沙丘土壤水分时空变化规律在很大程度上受积雪融化和季节性冻土的影响.由于冬季稳定存在20~30 cm的积雪于春季融化,使得春季沙丘土壤含水率成为全年最高的季节,从而为早春植物的萌发生长创造了有利的条件.冬季1 m多深的冻土于早春时节由表及里开始消融,沙丘表面融化的雪水在坡面重力作用下,沿难以透水的冻土层上界自坡上向坡下发生迁移,在春夏季形成了垄间最高、坡部次之和垄顶最少的土壤水分空间格局.该研究具有生态学意义,可为古尔班通古特沙漠特殊环境条件下植被恢复与重建提供依据.
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| 关 键 词： | 沙垄 土壤水分 积雪与冻土变化 古尔班通古特沙漠 |
| 文章编号： | 1000-0240(2006)02-0262-07 |
| 收稿时间： | 10 16 2005 12:00AM |
| 修稿时间： | 01 22 2006 12:00AM |
Variation Pattern of Soil Water Content in Longitudinal Dune in the Southern Part of Gurbantünggüt Desert: How Snow Melt and Frozen Soil Change Affect the Soil Moisture |
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| WANG Xue-qin,ZHANG Yuan-ming,JIANG Jin,CHEN Jun-jie,SONG Chun-wu.Variation Pattern of Soil Water Content in Longitudinal Dune in the Southern Part of Gurbantünggüt Desert: How Snow Melt and Frozen Soil Change Affect the Soil Moisture[J].Journal of Glaciology and Geocryology,2006,28(2):262-268. |
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| Authors: | WANG Xue-qin ZHANG Yuan-ming JIANG Jin CHEN Jun-jie SONG Chun-wu |
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| Institution: | 1. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi Xinjiang 830011, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | 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 Gurbantunggut 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. |
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| Keywords: | longitudinal dune soil moisture changes of snow cover and frozen soil Gurbantiinggiat Desert |
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