干旱区生态环境知识资源中心(Arid): Postdrought Recovery Time Across Global Terrestrial Ecosystems

Arid

DOI	10.1029/2020JG005699
	Postdrought Recovery Time Across Global Terrestrial Ecosystems
	Zhang, Shulei; Yang, Yuting; Wu, Xiuchen; Li, Xiaoyan; Shi, Fangzhong
通讯作者	Yang, YT (corresponding author), Tsinghua Univ, State Key Lab Hydrosci & Engn, Dept Hydraul Engn, Beijing, Peoples R China.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
ISSN	2169-8953
EISSN	2169-8961
出版年	2021
卷号	126 期号:6
英文摘要	Drought, as an intermittent disturbance of the water cycle, profoundly impacts the terrestrial ecosystem. Recovery time (RT) of an ecosystem from drought is an important indicator of assessing drought impacts and ecosystem resilience, yet the spatiotemporal pattern of ecosystem postdrought RT remains controversial in existing studies. Here we investigate the spatiotemporal pattern of postdrought RT across global terrestrial ecosystems using two observation-based gross primary productivity (GPP) data sets: direct flux-site observations and gridded estimates by upscaling flux-site observations using machine-learning approach. For droughts that occur on average once every 5.2 years, the RT typically ranges between 2 and 8 months, with a global mean RT of similar to 6 months. Spatially, both GPP data sets show a significant bilinear relationship between RT and moisture gradient, and that ecosystems in arid and humid regions tend to recover from drought more rapidly than semi-arid/sub-humid ecosystems. Additionally, forests show an overall longer RT than shrublands and grasslands. Temporally, global ecosystem RT shows a slight yet significant increasing trend (0.032 months yr(-1)) during 1982-2010, which is partly caused by the increasing drought for the same period. However, the observed patterns of RT across global bio-climatic zones are not captured by the state-of-the-art land surface models, which exhibit a shorter RT in semi-arid/sub-humid ecosystems but longer RT in arid/humid regions, and a larger increasing trend of RT over time (0.069 months yr(-1)). Our findings provide crucial insights into ecosystem vulnerability to sub-decadal stress events and ecosystem recovery trajectories among diverse bio-climatic regions and highlight potential model deficiencies that should be accounted for in future model developments.
英文关键词	postdrought recovery time terrestrial ecosystem climate change gross primary productivity land surface models
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000666436400022
WOS关键词	MODEL INTERCOMPARISON PROJECT ; PROGRAM MULTISCALE SYNTHESIS ; DROUGHT SEVERITY INDEX ; CARBON-CYCLE ; TREE MORTALITY ; INDUCED FLUORESCENCE ; SEMIARID ECOSYSTEMS ; CLIMATE EXTREMES ; ROOT RESPONSES ; VEGETATION
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向	Environmental Sciences & Ecology ; Geology
来源机构	北京师范大学 ; 清华大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368716
作者单位	[Zhang, Shulei; Wu, Xiuchen; Li, Xiaoyan; Shi, Fangzhong] Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, Sch Nat Resources, Fac Geog Sci, Beijing, Peoples R China; [Zhang, Shulei] Sun Yat Sen Univ, Sch Atmospher Sci, Guangdong Prov Key Lab Climate Change & Nal Disas, Southern Marine Sci Engn Guangdong Lab Zhuhai, Guangzhou, Peoples R China; [Yang, Yuting] Tsinghua Univ, State Key Lab Hydrosci & Engn, Dept Hydraul Engn, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Shulei,Yang, Yuting,Wu, Xiuchen,et al. Postdrought Recovery Time Across Global Terrestrial Ecosystems[J]. 北京师范大学, 清华大学,2021,126(6).
APA	Zhang, Shulei,Yang, Yuting,Wu, Xiuchen,Li, Xiaoyan,&Shi, Fangzhong.(2021).Postdrought Recovery Time Across Global Terrestrial Ecosystems.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,126(6).
MLA	Zhang, Shulei,et al."Postdrought Recovery Time Across Global Terrestrial Ecosystems".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 126.6(2021).