气候变化领域集成服务门户(CCPortal): Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau

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DOI	10.1029/2019JG005249
	Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau
	Wang, Xiaoyi; Wang, Tao; Liu, Dan; Zhang, Taotao; Xu, Jinfeng; Cui, Guishan; Lv, Guanting; Huang, Huabing
通讯作者	Wang, T ; Liu, D (通讯作者)
发表日期	2019
ISSN	2169-8953
EISSN	2169-8961
起始页码	3778
结束页码	3797
卷号	124 期号:12
英文摘要	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.
关键词	INDUCED CHLOROPHYLL FLUORESCENCE GROSS PRIMARY PRODUCTION CLIMATE-CHANGE SATELLITE MEASUREMENTS CANOPY REFLECTANCE SPRING PHENOLOGY CARBON BALANCE LAND-USE TEMPERATE GRASSLAND
英文关键词	phenological timing; trend; interannual variability; vegetation productivity; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:000502243900001
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259460
推荐引用方式 GB/T 7714	Wang, Xiaoyi,Wang, Tao,Liu, Dan,et al. Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2019,124(12).
APA	Wang, Xiaoyi.,Wang, Tao.,Liu, Dan.,Zhang, Taotao.,Xu, Jinfeng.,...&Huang, Huabing.(2019).Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,124(12).
MLA	Wang, Xiaoyi,et al."Multisatellite Analyses of Spatiotemporal Variability in Photosynthetic Activity Over the Tibetan Plateau".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 124.12(2019).