干旱区生态环境知识资源中心(Arid): Global variations in critical drought thresholds that impact vegetation

Arid

DOI	10.1093/nsr/nwad049
	Global variations in critical drought thresholds that impact vegetation
	Li, Xiangyi; Piao, Shilong; Huntingford, Chris; Penuelas, Josep; Yang, Hui; Xu, Hao; Chen, Anping; Friedlingstein, Pierre; Keenan, Trevor F.; Sitch, Stephen; Wang, Xuhui; Zscheischler, Jakob; Mahecha, Miguel D.
通讯作者	Piao, SL
来源期刊	NATIONAL SCIENCE REVIEW
ISSN	2095-5138
EISSN	2053-714X
出版年	2023
卷号	10 期号:5
英文摘要	Identifying the thresholds of drought that, if crossed, suppress vegetation functioning is vital for accurate quantification of how land ecosystems respond to climate variability and change. We present a globally applicable framework to identify drought thresholds for vegetation responses to different levels of known soil-moisture deficits using four remotely sensed vegetation proxies spanning 2001-2018. The thresholds identified represent critical inflection points for changing vegetation responses from highly resistant to highly vulnerable in response to drought stress, and as a warning signal for substantial vegetation impacts. Drought thresholds varied geographically, with much lower percentiles of soil-moisture anomalies in vegetated areas covered by more forests, corresponding to a comparably stronger capacity to mitigate soil water deficit stress in forested ecosystems. Generally, those lower thresholds are detected in more humid climates. State-of-the-art land models, however, overestimated thresholds of soil moisture (i.e. overestimating drought impacts), especially in more humid areas with higher forest covers and arid areas with few forest covers. Based on climate model projections, we predict that the risk of vegetation damage will increase by the end of the twenty-first century in some hotspots like East Asia, Europe, Amazon, southern Australia and eastern and southern Africa. Our data-based results will inform projections on future drought impacts on terrestrial ecosystems and provide an effective tool for drought management.
英文关键词	drought threshold inflection points vegetation response soil moisture drought impacts
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:001104190400021
WOS关键词	TERRESTRIAL CARBON-CYCLE ; CLIMATE EXTREMES ; PRODUCTIVITY ; RESPONSES ; INCREASE ; TREE ; FLUORESCENCE ; EARTH
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397879
推荐引用方式 GB/T 7714	Li, Xiangyi,Piao, Shilong,Huntingford, Chris,et al. Global variations in critical drought thresholds that impact vegetation[J],2023,10(5).
APA	Li, Xiangyi.,Piao, Shilong.,Huntingford, Chris.,Penuelas, Josep.,Yang, Hui.,...&Mahecha, Miguel D..(2023).Global variations in critical drought thresholds that impact vegetation.NATIONAL SCIENCE REVIEW,10(5).
MLA	Li, Xiangyi,et al."Global variations in critical drought thresholds that impact vegetation".NATIONAL SCIENCE REVIEW 10.5(2023).