IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2014  > Vol11 No.3
The influence of seasonal snow on soil thermal and water dynamics under different vegetation covers in a permafrost region
Chang Juan1; Wang Gen-xu2; Gao Yong-heng2; Wang Yi-bo1
Corresponding AuthorCHANG Juan
2014-05-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume11Issue:3Pages:727-745
SubtypeArticle
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
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11629-013-2893-0
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordACTIVE LAYER ; ALPINE TUNDRA ; NORTHERN-HEMISPHERE ; CLIMATE-CHANGE ; TEMPERATURES ; VARIABILITY ; IMPACT ; ALASKA ; MANIPULATION ; ECOSYSTEMS
Language英语
WOS SubjectEnvironmental Sciences
WOS IDWOS:000336319100014
Funding OrganizationNatural Science Foundation of China(41301024 ; National Basic Research Program of China (973 Program)(2013CBA01807) ; 40925002)
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6901
CollectionJournal of Mountain Science_Journal of Mountain Science-2014_Vol11 No.3
山地表生过程与生态调控重点实验室
Affiliation1.Lanzhou Univ, Coll Earth & Environm Sci, Lanhou 730000, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
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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