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Satellite observed indicators of the maximum plant growth potential and their responses to drought over Tibetan Plateau (1982-2015)

文献类型：期刊论文

作者Li, Jialing1; Wu, Chaoyang2,3; Wang, Xiaoyue2; Peng, Jie2; Dong, Donglin1; Lin, Gang1; Gonsamo, Alemu4
刊名ECOLOGICAL INDICATORS
出版日期2020
卷号108页码:8
关键词Drought SPEI NDVImax Tibetan Plateau
ISSN号1470-160X
DOI10.1016/j.ecolind.2019.105732
通讯作者Wu, Chaoyang(wucy@igsnrr.ac.cn) ; Lin, Gang(Lingang@igsnrr.ac.cn)
英文摘要The maximum plant growth potential in summer plays an important role in regulating annual carbon balance. However, indicators of plant growth at this stage are not well established. With high elevations on the Tibetan Plateau (TP), terrestrial ecosystems in this region are vulnerable to climate change and in particular, the frequently and intensified droughts as projected by ecosystem models. To better understand the maximum plant growth potential and its response to drought over the past three decades (1982-2015), we analyzed the impacts of drought, as indicated by the Standardized Precipitation-Evapotranspiration Index (SPEI), on two derived indicators of the maximum summer growth of plants, including the timing and the absolute value of the maximum Normalized Difference Vegetation Index (referred as the peak of growing season, POS and NDVImax respectively). We found that both temporal and spatial patterns of SPEI, POS and NDVImax showed high spatial heterogeneity over TP. A higher SPEI led to a later POS for about 57% of regions but it reversed for the alpine sparse vegetation roughly account for 3.5% of all pixels, probably due to water availability of this plant functional type. For NDVImax we found a significantly enhanced NDVImax in summer for a higher SPEI over similar to 70% of significant pixels, irrespective of differences among plant functional types. We further analyzed these correlations by temperature and precipitation gradients and found that an annual precipitation around 550 mm seemed to be a threshold separating the positive and negative impacts of drought on NDVImax. These results would be useful to better comprehend the impacts of drought on ecosystem response in a changing climate in future.
WOS关键词VEGETATION AUTUMN PHENOLOGY ; SPRING PHENOLOGY ; TEMPERATE ECOSYSTEMS ; CARBON SEQUESTRATION ; GROWING-SEASON ; CLIMATE-CHANGE ; FEEDBACKS ; PRODUCTIVITY ; TRANSITIONS ; SENESCENCE
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19040103] ; National Natural Science Foundation of China[41871255] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC011]
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000493902400052
出版者ELSEVIER
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences, CAS
源URL[http://ir.igsnrr.ac.cn/handle/311030/131881]  
专题中国科学院地理科学与资源研究所
通讯作者Wu, Chaoyang; Lin, Gang
作者单位1.China Univ Min & Technol, Coll Geosci & Surveying Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100101, Peoples R China
4.Univ Toronto, Dept Geog & Planning, 100 St George St, Toronto, ON M5S 3G3, Canada
推荐引用方式
GB/T 7714		 Li, Jialing,Wu, Chaoyang,Wang, Xiaoyue,et al. Satellite observed indicators of the maximum plant growth potential and their responses to drought over Tibetan Plateau (1982-2015)[J]. ECOLOGICAL INDICATORS,2020,108:8.
APA Li, Jialing.,Wu, Chaoyang.,Wang, Xiaoyue.,Peng, Jie.,Dong, Donglin.,...&Gonsamo, Alemu.(2020).Satellite observed indicators of the maximum plant growth potential and their responses to drought over Tibetan Plateau (1982-2015).ECOLOGICAL INDICATORS,108,8.
MLA Li, Jialing,et al."Satellite observed indicators of the maximum plant growth potential and their responses to drought over Tibetan Plateau (1982-2015)".ECOLOGICAL INDICATORS 108(2020):8.

入库方式： OAI收割

来源：地理科学与资源研究所

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