干旱区生态环境知识资源中心(Arid): The Dependence of Ecosystem Water Use Partitioning on Vegetation Productivity at the Inter-Annual Time Scale

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DOI	10.1029/2020JD033756
	The Dependence of Ecosystem Water Use Partitioning on Vegetation Productivity at the Inter-Annual Time Scale
	Jing, Zhaoxia; Cheng, Lei; Zhang, Lu; Wang, Ying-Ping; Liu, Pan; Zhang, Xiang; Wang, Qilin
通讯作者	Cheng, L (corresponding author), Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Peoples R China. ; Cheng, L (corresponding author), Hubei Prov Collaborat Innovat Ctr Water Resources, Wuhan, Peoples R China. ; Cheng, L (corresponding author), Hubei Prov Key Lab Water Syst Sci Sponge City Con, Wuhan, Peoples R China.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2021
卷号	126 期号:16
英文摘要	The dependence of inter-annual ecosystem evapotranspiration (ET) partitioning on vegetation dynamics is crucial for understanding the long term coupling relationship between the water and carbon cycles. The objective of this study was to determine the spatial variation of ET partitioning (T/ET) and the inter-annual dependencies of T/ET on vegetation gross primary productivity (GPP). The investigation was conducted at the global scale based on seven global datasets and at the point scale at 37 flux sites. The spatial variations of T/ET were divided into three phases, that is, the rapidly increasing phase (P1), slowly increasing phase (P2), and decreasing phase (P3), which were located in arid and cold regions, temperate regions, and tropical rainforest regions, respectively. The three-phase spatial variations were primarily driven by the different spatial variations of the two water use pathways (i.e., transpiration, T and evaporation, E) in ecosystems with different productivity levels. In P1 and P2 ecosystems, the inter-annual dependencies of T/ET on GPP were mostly positive, and in P3 ecosystems, it was mostly negative. This revealed a significantly decreased dependence as GPP increased, which was attributed to the different dependencies of T and E on GPP. Based on the effects of GPP on ET under climate variations (represented by precipitation, P), ET had the smallest inter-annual variations in most of global vegetated grid cells due to the joint regulation of T and E by GPP and P. This study highlights the significant role of vegetation productivity in regulating inter-annual ET partitioning, and improves understandings on the coupled water-carbon cycles.
英文关键词	ET partitioning vegetation productivity spatial variation temporal dependence inter-annual time scale
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000688706700015
WOS关键词	LEAF-AREA INDEX ; USE EFFICIENCY ; SOIL EVAPORATION ; SPATIOTEMPORAL VARIATIONS ; SPATIAL VARIATIONS ; LAND EVAPORATION ; ENERGY-BALANCE ; EVAPOTRANSPIRATION ; TRANSPIRATION ; CLIMATE
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	Commonwealth Scientific and Industrial Research Organisation
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368521
作者单位	[Jing, Zhaoxia; Cheng, Lei; Liu, Pan; Zhang, Xiang; Wang, Qilin] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan, Peoples R China; [Jing, Zhaoxia; Cheng, Lei; Liu, Pan; Zhang, Xiang; Wang, Qilin] Hubei Prov Collaborat Innovat Ctr Water Resources, Wuhan, Peoples R China; [Jing, Zhaoxia; Cheng, Lei; Liu, Pan; Zhang, Xiang; Wang, Qilin] Hubei Prov Key Lab Water Syst Sci Sponge City Con, Wuhan, Peoples R China; [Zhang, Lu] CSIRO Land & Water, Canberra, ACT, Australia; [Wang, Ying-Ping] CSIRO Ocean & Atmosphere, Aspendale, Vic, Australia
推荐引用方式 GB/T 7714	Jing, Zhaoxia,Cheng, Lei,Zhang, Lu,et al. The Dependence of Ecosystem Water Use Partitioning on Vegetation Productivity at the Inter-Annual Time Scale[J]. Commonwealth Scientific and Industrial Research Organisation,2021,126(16).
APA	Jing, Zhaoxia.,Cheng, Lei.,Zhang, Lu.,Wang, Ying-Ping.,Liu, Pan.,...&Wang, Qilin.(2021).The Dependence of Ecosystem Water Use Partitioning on Vegetation Productivity at the Inter-Annual Time Scale.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(16).
MLA	Jing, Zhaoxia,et al."The Dependence of Ecosystem Water Use Partitioning on Vegetation Productivity at the Inter-Annual Time Scale".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.16(2021).