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Divergent Climate Sensitivities of the Alpine Grasslands to Early Growing Season Precipitation on the Tibetan Plateau

文献类型：期刊论文

作者Wang, Zhipeng2,3; Zhang, Xianzhou2,4; Niu, Ben2; Zheng, Yunpu3; He, Yongtao2,4; Cao, Yanan5; Feng, Yunfei6; Wu, Jianshuang1
刊名REMOTE SENSING
出版日期2022-05-01
卷号14期号:10页码:17
关键词precipitation changes climate sensitivity remote water availability Tibetan Plateau
DOI10.3390/rs14102484
通讯作者Niu, Ben(niub@igsnrr.ac.cn)
英文摘要Warming is expected to intensify hydrological processes and reshape precipitation regimes, which is closely related to water availability for terrestrial ecosystems. Effects of the inter-annual precipitation changes on plant growth are widely concerned. However, it is not well-known how plant growth responds to intra-annual precipitation regime changes. Here, we compiled reanalysis climate data (ERA5) and four satellite-based vegetation indices, including the Normalized Difference Vegetation Index (NDVI), the Enhanced Vegetation Index (EVI), the Solar-induced Chlorophyll Fluorescence (SIF), and the Modified Triangular Vegetation Index (MTVI2), to evaluate the response of alpine grasslands (including alpine meadow and alpine steppe) to the change of precipitation regimes, especially to the intra-annual precipitation regimes on the Tibetan Plateau. We found monthly precipitation over the alpine steppe significantly increased in the growing season (May-September), but precipitation over the alpine meadow significantly increased only in the early growing season (May-June) (MJP) during the past four decades (1979-2019). The inter-annual plant growth (vegetation indices changes) on the alpine meadow was dominated by temperature, but it was driven by precipitation for the alpine steppe. On the intra-annual scale, the temperature sensitivity of the vegetation indices generally decreased but precipitation sensitivity increased during the growing season for both the alpine meadow and steppe. In response to the increase in MJP, we found the temperature sensitivity of the vegetation indices during the mid-growing season (July-August) (MGNDVI, MGEVI, MGSIF, and MGMTVI2) in the alpine meadow significantly increased (p < 0.01) while its precipitation sensitivity significantly decreased (p < 0.01). We infer that more MJP over the meadow may be the result of enhanced evapotranspiration, which is at the expense of soil moisture and even induces soil "drought" in the early growing season. This may be to elevate community water acquisition capacity through altering root mass allocation and community composition, consequently regulating the divergent climate sensitivities of vegetation growth in the mid-growing season. Our findings highlight that it is inadequate to regard precipitation as an indicator of water availability conditions for plant growth, which may limit our understanding of the response and acclimatization of plants to climate change.
WOS关键词NET PRIMARY PRODUCTIVITY ; GREEN-UP DATE ; SPRING PHENOLOGY ; MOISTURE SOURCE ; IMPACTS ; RESPONSES ; TEMPERATURE ; ECOSYSTEM ; NORTHERN ; DROUGHT
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19070303] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA2005010203] ; West Light Foundation of the Chinese Academy of Sciences
WOS研究方向Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
语种英语
出版者MDPI
WOS记录号WOS:000801801100001
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; West Light Foundation of the Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/178868]  
专题中国科学院地理科学与资源研究所
通讯作者Niu, Ben
作者单位1.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Lhasa Plateau Ecosyst Res Stn, Beijing 100101, Peoples R China
3.Hebei Univ Engn, Sch Water Conservancy & Hydropower, Handan 056038, Peoples R China
4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
5.Hebei Univ Engn, Sch Earth Sci & Engn, Handan 056038, Peoples R China
6.Tangshan Normal Univ, Dept Resource Management, Tangshan 063000, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Zhipeng,Zhang, Xianzhou,Niu, Ben,et al. Divergent Climate Sensitivities of the Alpine Grasslands to Early Growing Season Precipitation on the Tibetan Plateau[J]. REMOTE SENSING,2022,14(10):17.
APA Wang, Zhipeng.,Zhang, Xianzhou.,Niu, Ben.,Zheng, Yunpu.,He, Yongtao.,...&Wu, Jianshuang.(2022).Divergent Climate Sensitivities of the Alpine Grasslands to Early Growing Season Precipitation on the Tibetan Plateau.REMOTE SENSING,14(10),17.
MLA Wang, Zhipeng,et al."Divergent Climate Sensitivities of the Alpine Grasslands to Early Growing Season Precipitation on the Tibetan Plateau".REMOTE SENSING 14.10(2022):17.

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来源：地理科学与资源研究所

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