IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
Water regime shifts in the active soil layer of the Qinghai-Tibet Plateau permafrost region, under different levels of vegetation
Wang Genxu1; Li Shengnan1; Hu Hongchang2; Li Yuanshou3
Corresponding AuthorWang Genxu
2009
Source PublicationGEODERMA
ISSN0016-7061
EISSN1872-6259
Volume149Issue:3-4Pages:280-289
SubtypeArticle
Abstract

Soil moisture and water cycling in a permafrost active layer are affected in a synergistic manner by both the sequence of soil temperature and changes in vegetative cover. Between 2004 and 2007, the dynamics of soil water content and water movement in the active layer of alpine meadow soils were monitored at sites located in the permafrost region of the Qinghai-Tibetan Plateau, China for four years to examine the synergistic effects of freeze-thaw cycles and levels of vegetation cover. The analysis of variations in monthly and seasonal soil moisture, soil-desiccation index, and soil available indicated that soil moisture exhibited a relatively stable and consistent pattern over the growing season (July-September), independent from the vegetation cover. Greater soil moisture was present in the upper root zone and at the bottom of the soil profile, whereas lower moisture levels occurred in the middle portion of the profile. Irrespective of soil depth, the lower the vegetation cover, the quicker the increase in soil liquid water during the thaw initiation period (May and June), and the quicker its decrease during the freeze initiation period (October and November). In addition, the greater the vegetation cover, the greater the available water content of the upper root zone and the less the water content of the soil layer at 0.60-0.70 m depth below the root zone. Both the soil hydraulic parameters and the spatiotemporal distribution of the water content were subject to the synergistic action of the freeze-thaw cycle and the extent of vegetation cover. The variances in active soil heat transmission and heat-water coupling relationship under the different vegetation covers were considered the main driving factors in the distribution and dynamics of the active soil water regime. The permafrost supports the development of alpine frost meadow ecosystems, and well-ordered, high-cover alpine meadow vegetation favors the protection of permafrost from degradation. (C) 2009 Published by Elsevier B.V.

KeywordAlpine Frost Meadow Soil Soil Water Distribution Pattern Soil Water Dynamics Available Water Permafrost Qinghai-tibetan Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.geoderma.2008.12.008
WOS Subject ExtendedAgriculture
Indexed BySCI
WOS KeywordDYNAMICS ; EXCHANGE
Language英语
Quartile2区
TOP
WOS SubjectSoil Science
WOS IDWOS:000264360100013
Funding Organizationnational key scientific plan(2007CB411504) ; Natural Science Foundation of China(40730634)
Accession numberAccession number: 20090711910827
Citation statistics
Cited Times:31[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10549
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.Lanzhou Univ, Coll Resources & Environm, Lanzhou 730000, Peoples R China
3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, 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 Shengnan,Hu Hongchang,et al. Water regime shifts in the active soil layer of the Qinghai-Tibet Plateau permafrost region, under different levels of vegetation[J]. GEODERMA,2009,149(3-4):280-289.
APA Wang Genxu,Li Shengnan,Hu Hongchang,&Li Yuanshou.(2009).Water regime shifts in the active soil layer of the Qinghai-Tibet Plateau permafrost region, under different levels of vegetation.GEODERMA,149(3-4),280-289.
MLA Wang Genxu,et al."Water regime shifts in the active soil layer of the Qinghai-Tibet Plateau permafrost region, under different levels of vegetation".GEODERMA 149.3-4(2009):280-289.
Files in This Item:
File Name/Size DocType Version Access License
Water regime shifts (777KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang Genxu]'s Articles
[Li Shengnan]'s Articles
[Hu Hongchang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang Genxu]'s Articles
[Li Shengnan]'s Articles
[Hu Hongchang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang Genxu]'s Articles
[Li Shengnan]'s Articles
[Hu Hongchang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Water regime shifts in the active soil layer of the Qinghai-Tibet Plateau permafrost region, under different levels of vegetation.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.