兰州大学机构库 >资源环境学院
The influence of seasonal snow on soil thermal and water dynamics under different vegetation covers in a permafrost region
Chang, J(常娟)1; Wang Gen-xu2; Gao Yong-heng2; Wang, YB(王一博)1
2014-05
Source PublicationJournal of Mountain Science   Impact Factor & Quartile Of Published Year  The Latest Impact Factor & Quartile
ISSN1672-6316
Volume11Issue:3Pages:727-745
AbstractSeasonal snow is one of the most important influences on the development and distribution of permafrost and the hydrothermal regime in surface soil. Alpine meadow, which constitutes the main land type in permafrost regions of the Qinghai-Tibet Plateau, was selected to study the influence of seasonal snow on the temperature and moisture in active soil layers under different vegetation coverage. Monitoring sites for soil moisture and temperature were constructed to observe the hydrothermal processes in active soil layers under different vegetation cover with seasonal snow cover variation for three years from 2010 to 2012. Differences in soil temperature and moisture in areas of diverse vegetation coverage with varying levels of snow cover were analyzed using active soil layer water and temperature indices. The results indicated that snow cover greatly influenced the hydrothermal dynamics of the active soil layer in alpine meadows. In the snow manipulation experiment with a snow depth greater than 15 cm, the snow cover postponed both the freeze-fall and thawrise onset times of soil temperature and moisture in alpine LC (lower vegetation coverage) meadows and of soil moisture in alpine HC (higher vegetation coverage) meadows; however, the opposite response occurred for soil temperatures of alpine HC meadows, where the entire melting period was extended by advancing the thaw-rise and delaying the freeze-fall onset time of the soil temperature. Snow cover resulted in a decreased amplitude and rate of variation in soil temperature, for both alpine HC meadows and alpine LC meadows, whereas the distinct influence of snow cover on the amplitude and rate of soil moisture variation occurred at different soil layers with different vegetation coverages. Snow cover increased the soil moisture of alpine grasslands during thawing periods. The results confirmed that the annual hydrothermal dynamics of active layers in permafrost were subject to the synergistic actions of both snow cover and vegetation coverage.
KeywordPermafrost Snow cover Vegetation cover Active soil layer Hydrothermal dynamics Synergistic action
Subject AreaEnvironmental Sciences & Ecology
PublisherSCIENCE CHINA PRESS
DOI10.1007/s11629-013-2893-0
Publication PlaceBEIJING
Indexed BySCIE ; CSCD
Language英语
First Inst
Funding Project国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划)
Host of Journal中国科学院成都山地灾害与环境研究所
Project NumberNatural Science Foundation of China [41301024, 40925002] ; National Basic Research Program of China (973 Program) [2013CBA01807]
WOS IDWOS:000336319100014
CSCD IDCSCD:5203437
Funding OrganizationNSFC ; MOST
SubtypeArticle
IRIDCSCD0706
Department[Chang Juan;
Wang Yi-bo] Lanzhou Univ, Coll Earth & Environm Sci, Lanhou 730000, Peoples R China;
[Wang Gen-xu;
Gao Yong-heng] Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
Citation statistics
Cited Times:5[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/120434
Collection资源环境学院
Corresponding AuthorChang Juan
Affiliation
1.Lanzhou Univ, Coll Earth & Environm Sci, Lanhou 730000, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
First Author AffilicationCollege of Earth Environmental Sciences
Corresponding Author AffilicationCollege of Earth Environmental Sciences
First Signature AffilicationCollege of Earth Environmental Sciences
Recommended Citation
GB/T 7714
Chang Juan,Wang Gen-xu,Gao Yong-heng,et al. The influence of seasonal snow on soil thermal and water dynamics under different vegetation covers in a permafrost region[J]. Journal of Mountain Science,2014,11(3):727-745.
APA Chang Juan,Wang Gen-xu,Gao Yong-heng,&Wang Yi-bo.(2014).The influence of seasonal snow on soil thermal and water dynamics under different vegetation covers in a permafrost region.Journal of Mountain Science,11(3),727-745.
MLA Chang Juan,et al."The influence of seasonal snow on soil thermal and water dynamics under different vegetation covers in a permafrost region".Journal of Mountain Science 11.3(2014):727-745.
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