干旱区生态环境知识资源中心(Arid): Distinct vegetation response to drying and wetting trends across an aridity threshold

Arid

DOI	10.1088/2515-7620/abe8e3
	Distinct vegetation response to drying and wetting trends across an aridity threshold
	Zhao, Wei; Yu, Xiubo; Liu, Yu; Xu, Li; Chen, Zhi; Li, Shenggong
通讯作者	Yu, XB (corresponding author), Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China. ; Yu, XB (corresponding author), Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China.
来源期刊	ENVIRONMENTAL RESEARCH COMMUNICATIONS
ISSN	2515-7620
出版年	2021
卷号	3 期号:2
英文摘要	Aridity regulates the terrestrial ecosystem productivity in water-limited regions. The aridity index (AI) is often defined as the ratio of annual precipitation to annual potential evapotranspiration. However, how the drying and wetting influence the vegetation response and its characteristic along aridity gradient remains unclear. Here, we examined trends of the AI and normalized difference vegetation index (NDVI) in the drylands of East Asia from 1982 to 2015, which denoted the drying and wetting trends and vegetation response, respectively. The results show that the variability in land area and AI from 1982-2015 was lower in the whole dryland than its subtypes including hyper-arid, arid, semi-arid, and dry sub-humid regions. Drying and wetting trends were observed in each AI interval along a spatial aridity gradient. Wetting trends are prevalent owing to their area and magnitude were twice those of drying trends. Spatial variation of aridity shaped the pattern of trends in vegetation response to drying and wetting trends; drier regions had smaller and narrower ranges of variation in NDVI trends relative to wetter regions. A shift in AI trends and NDVI trends along the spatial aridity gradient occurred at 0.4 of AI. Distinct patterns of vegetation response to aridity change were observed across the aridity threshold, and the transition region was identified in the studied drylands. The results suggest that changes in the subtypes might be masked by the entire drylands and then leading to failure in recognizing the transformation of the subtypes. This implies that terrestrial carbon storage variability prediction should consider the spatial aridity changes to avoid the uncertainties due to the divergent vegetation response to AI trends at different aridity levels.
英文关键词	aridity index drying and wetting trends threshold drylands vegetation index trends
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000628179800001
WOS关键词	INTERANNUAL VARIABILITY ; SEMIARID ECOSYSTEMS ; DRYLAND EXPANSION ; CLIMATE EXTREMES ; DROUGHT ; NDVI ; EVAPOTRANSPIRATION ; PRODUCTIVITY ; EVAPORATION ; IMPACTS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369022
作者单位	[Zhao, Wei; Yu, Xiubo; Liu, Yu; Xu, Li; Chen, Zhi; Li, Shenggong] Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China; [Yu, Xiubo; Liu, Yu; Chen, Zhi; Li, Shenggong] Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Wei,Yu, Xiubo,Liu, Yu,et al. Distinct vegetation response to drying and wetting trends across an aridity threshold[J]. 中国科学院地理科学与资源研究所,2021,3(2).
APA	Zhao, Wei,Yu, Xiubo,Liu, Yu,Xu, Li,Chen, Zhi,&Li, Shenggong.(2021).Distinct vegetation response to drying and wetting trends across an aridity threshold.ENVIRONMENTAL RESEARCH COMMUNICATIONS,3(2).
MLA	Zhao, Wei,et al."Distinct vegetation response to drying and wetting trends across an aridity threshold".ENVIRONMENTAL RESEARCH COMMUNICATIONS 3.2(2021).