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Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai-Tibet
Wang, Genxu1,2; Li, Yuanshou2; Hu, Hongchang3; Wang, Yibo3
Corresponding AuthorWang, Genxu
2008
Source PublicationHYDROLOGICAL PROCESSES
ISSN0885-6087
Volume22Issue:17Pages:3310-3320
SubtypeArticle
AbstractSeasonal changes over 2 years (2004-2006) in soil moisture content (0,,) of frozen alpine frost meadow soils of the Qinghai-Tibet plateau permafrost region under three different levels of vegetation cover were investigated. Vegetation cover and air temperature changes had significant effect (synergistic effect) on theta(v) and its distribution in the soil profile. During periods of soil freezing or thawing, the less the vegetation cover, the quicker the temperature drop or rise of soil water, and the shorter the duration of the soil water freeze-thaw response in the active soil layer. Under 30% and 65% vegetation cover the amplitude of variation in theta(v) during the freezing period was 20-26% greater than that under 93% cover, while during the thawing period, it was 1.5- to 40-5-fold greater. The freezing temperature of the Surface soil layer, (f)T(s), was 1.6 degrees C lower under 30% vegetation cover than under 93% vegetation cover. Changes in vegetation cover of the alpine frost meadow affected theta(v) and its distribution, as well as the relationship between theta(v) and soil temperature (T(s)). As vegetation cover decreased, soil water circulation in the active layer increased, and the response to temperature of the water distribution across the soil profile was heightened. The quantity of transitional soil phase water at different depths significantly increased as vegetation cover decreased. The influence of vegetation cover and soil temperature distribution led to a relatively dry soil layer in the middle of the profile (0.70-0.80 m) under high vegetation cover. Alpine meadow theta(v) and its pattern of distribution in the permafrost region were the result of the synergistic effect of air temperature and vegetation cover. Copyright (C) 2007 John Wiley & Soils, Ltd.
KeywordPermafrost Soil Water Content Alpine Frost Meadow Vegetation Cover Temperature Change
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1002/hyp.6913
WOS Subject ExtendedWater Resources
Indexed BySCI
WOS KeywordPLATEAU ; HYDROLOGY ; ECOSYSTEM ; ALASKA
Language英语
Quartile3区
TOP
WOS SubjectWater Resources
WOS IDWOS:000258519700008
Funding OrganizationThe National Basic Research Program(2007CB411504) ; Chinese Academy of Science ; Natural Science foundation of China(90511003)
Citation statistics
Cited Times:40[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10530
Collection成都山地所知识仓储(2009年以前)
山地表生过程与生态调控重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Cryosphere Res Stn Cold & Arid Reg, Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
3.Lanzhou Univ, Coll Resources & Environm, Lanzhou 730000, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Wang, Genxu,Li, Yuanshou,Hu, Hongchang,et al. Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai-Tibet[J]. HYDROLOGICAL PROCESSES,2008,22(17):3310-3320.
APA Wang, Genxu,Li, Yuanshou,Hu, Hongchang,&Wang, Yibo.(2008).Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai-Tibet.HYDROLOGICAL PROCESSES,22(17),3310-3320.
MLA Wang, Genxu,et al."Synergistic effect of vegetation and air temperature changes on soil water content in alpine frost meadow soil in the permafrost region of Qinghai-Tibet".HYDROLOGICAL PROCESSES 22.17(2008):3310-3320.
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