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Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau
Wang, XY (Wang, Xiaoyi)1; Wang, T (Wang, Tao,2,3)1; Liu, D (Liu, Dan)1; Zhang, TT (Zhang, Taotao)1; Xu, JF (Xu, Jinfeng)4; Cui, GS (Cui, Guishan)1,4; Lv, GT (Lv, Guanting)4; Huang, HB (Huang, Huabing)5
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
2019
Volume124Issue:12Pages:3778-3797
DOI10.1029/2019JG005249
Abstract

Ecosystems on the Tibetan Plateau are particularly sensitive to climate change. Significant advances have been made toward understanding the effects of climate change on the vegetation productivity of the plateau by using satellite observations, but a comprehensive study including various satellite measurements has yet to be presented. Here, we analyze the spatiotemporal variability in Tibetan vegetation productivity using a variety of proxies, including the Normalized Difference Vegetation Index, Enhanced Vegetation Index, Near-Infrared Reflectance of vegetation, and Solar-Induced chlorophyll Fluorescence. First, in terms of productivity responses to seasonal climate variation, Near-Infrared Reflectance of vegetation- and Solar-Induced chlorophyll Fluorescence-based growing season length had better correlation with eddy covariance site measurements and was 50 days shorter than those of the other proxies. Second, all proxies, except the Normalized Difference Vegetation Index derived from Systeme Probatoire d'Observation de la Terre, displayed a dipole-like trend pattern, similar to the observed north-south dipole pattern of precipitation change. This result is explained by the finding that moisture is a dominant driver controlling the interannual variation in productivity. Third, we analyzed the long-term responses of vegetation productivity to the precipitation regime and found four distinct productivity regimes, desert steppe, alpine steppe, meadow, and shrub/forests, indicating that Tibetan productivity varies with precipitation in a nonlinear way. The result offers insights into how Tibetan vegetation will respond to future climate change. Our results provide a multisatellite perspective on the impacts of climate change on spatiotemporal variation in productivity and suggest an urgent need to improve Tibetan productivity simulation.

Subject AreaEnvironmental Sciences
WOS IDWOS:000502243900001
Language英语
Indexed BySCI
KeywordInduced Chlorophyll Fluorescence Gross Primary Production Climate-change Satellite Measurements Canopy Reflectance Spring Phenology Carbon Balance Land-use Temperate Grassland
WOS Research AreaEnvironmental Sciences & Ecology ; Geology
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
Cooperation Status国际
ISSN2169-8953
Department高寒生态重点实验室
URL查看原文
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9064
Collection图书馆
Corresponding AuthorWang, T (Wang, Tao,2,3); Liu, D (Liu, Dan)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing, Peoples R China;
2.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
3.Chinese Acad Sci, Kathmandu Ctr Res & Educ, Kathmandu, Nepal;
4.Yanbian Univ, Dept Geog, Yanji, Peoples R China;
5.Sun Yat Sen Univ, Sch Geospatial Engn & Sci, Guangzhou, Guangdong, Peoples R China.
Recommended Citation
GB/T 7714
Wang, XY ,Wang, T ,Liu, D ,et al. Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2019,124(12):3778-3797.
APA Wang, XY .,Wang, T .,Liu, D .,Zhang, TT .,Xu, JF .,...&Huang, HB .(2019).Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(12),3778-3797.
MLA Wang, XY ,et al."Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.12(2019):3778-3797.
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