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Response of soil heat-water processes to vegetation cover on the typical permafrost and seasonally frozen soil in the headwaters of the Yangtze and Yellow Rivers

文献类型：期刊论文

作者Hu HongChang1; Wang GenXu1,2; Wang YiBo1; Liu GuangSheng1; Li TaiBing1; Ren DongXing1
刊名CHINESE SCIENCE BULLETIN
出版日期2009-04-01
卷号54期号:7页码:1225-1233
关键词heat-water processes vegetation cover response headwaters of the Yangtze and Yellow Rivers
ISSN号1001-6538
通讯作者王根绪
合作状况国内
中文摘要基于青藏高原江河源区典型多年冻土和季节冻土区建立的不同植被盖度下7个地温和水分观测场,对多年冻土活动层和季节冻土土壤温度和水分对植被盖度的响应分为4个阶段进行分析和对比研究.结果表明:随着植被盖度的降低,多年冻土活动层冻结深度积分减少,而季节冻土冻结深度积分增加;多年冻土冻结期负值等温线和未冻结期正值等温线的最大侵入深度和持续时间随着植被盖度降低明显增加;多年冻土活动层20～60cm的土壤含水量随着植被盖度降低而减少,而60～80cm的土壤含水量反而增加,季节冻土土壤剖面0～120cm的水分含量随着植被盖度的降低而减少.植被盖度的变化改变了冻土水热过程,且多年冻土和季节冻土对植被盖度的响应不一致. 
英文摘要The response of soil temperature and moisture to vegetative cover in the active layer of permafrost and seasonally frozen soil were assessed and compared. Soil temperature and moisture, under a range of vegetation covers (92%, 65% and 30%) in the permafrost and vegetation covers (95%, 70%-80%, 40%-50% and 10%) in the seasonally frozen soil, were measured on a daily basis. A decline in vegetation cover led to a decrease in the integral of freezing depth of active permafrost layer, but an increase in seasonally frozen soil. The maximum invasion depth and duration of the negative isotherm during the frozen period and of the positive isotherm during the non-frozen period clearly increased when vegetation cover declined. With a reduction of vegetation cover, the soil moisture in the active layer of the permafrost decreased for depths of 0.20-0.60 m, but increased for depths of 0.60-0.80 m, while for seasonally frozen soil, soil moisture of the entire profile (0.10-1.20 m) increased. Variation in vegetation cover alters soil heat-water processes, but the response to it is different between permafrost and seasonally frozen soil.
WOS标题词Science & Technology
分类号P642.14
类目[WOS]Multidisciplinary Sciences
研究领域[WOS]Science & Technology - Other Topics
关键词[WOS]QINGHAI-TIBET PLATEAU ; ACTIVE LAYER ; SNOW COVER ; TEMPERATURE ; DEGRADATION ; REGION ; CHINA ; ECOSYSTEM ; FOREST ; IMPACT
收录类别SCI
资助信息国家自然科学基金(批准号:40730634,90151003);国家重点基础研究发展计划(编号:2007CB411504);中国科学院“百人计划”(2004)资助项目
语种英语
WOS记录号WOS:000264842600016
公开日期2014-02-11
源URL[http://ir.imde.ac.cn/handle/131551/6814]  
专题成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前）
成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位1.Lanzhou Univ, Coll Resources & Environm, Lanzhou 730000, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
推荐引用方式
GB/T 7714		 Hu HongChang,Wang GenXu,Wang YiBo,et al. Response of soil heat-water processes to vegetation cover on the typical permafrost and seasonally frozen soil in the headwaters of the Yangtze and Yellow Rivers[J]. CHINESE SCIENCE BULLETIN,2009,54(7):1225-1233.
APA Hu HongChang,Wang GenXu,Wang YiBo,Liu GuangSheng,Li TaiBing,&Ren DongXing.(2009).Response of soil heat-water processes to vegetation cover on the typical permafrost and seasonally frozen soil in the headwaters of the Yangtze and Yellow Rivers.CHINESE SCIENCE BULLETIN,54(7),1225-1233.
MLA Hu HongChang,et al."Response of soil heat-water processes to vegetation cover on the typical permafrost and seasonally frozen soil in the headwaters of the Yangtze and Yellow Rivers".CHINESE SCIENCE BULLETIN 54.7(2009):1225-1233.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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