How Carbon Footprint Responds to Water Circulation Rates and Availability at Different Timescales in a Subtropical Forest Ecosystem

doi:10.1021/acsearthspacechem.0c00289

	How Carbon Footprint Responds to Water Circulation Rates and Availability at Different Timescales in a Subtropical Forest Ecosystem
	Lu, Yao 1,2; Gao, Yang 1,2; Sun, Kun 1,2; Lyu, Sidan 1; Wen, Xuefa 1,2; Jia, Junjie 1,2; Li, Zhaoxi 1,2; Wang, Shuoyue 1,2
刊名	ACS EARTH AND SPACE CHEMISTRY
	2021-01-21
卷号	5 期号:1 页码:77-87
关键词	water cycle rate NPP C exchange subtropical watershed coupled carbon-nitrogen cycle
ISSN号	2472-3452
DOI	10.1021/acsearthspacechem.0c00289
通讯作者	Gao, Yang(gaoyang@igsnrr.ac.cn)
英文摘要	In the subtropics, the influence of water on the net ecosystem carbon exchange (NEE) is critical, subsequently determining net primary productivity (NPP). Water also contributes the majority of interannual variability in atmospheric carbon dioxide (CO2) concentrations in the subtropics and helps to mitigate climate change. Using the technology of vorticity correlation, this study continuously monitored NEE, ecosystem respiration (RE), and the gross ecosystem exchange (GEE) of a small subtropical watershed in the middle and lower reaches of the Yangtze River from 2014 to 2017. Water parameters were concurrently monitored, such as rainfall (RF), runoff (RO), evapotranspiration (ET), vapor-pressure deficit (VPD), and soil water content (SWC). Results showed that an increase in the water circulation rate and water availability will promote an increase in GEE, RE, and NEE on both hourly and daily timescales, but will inhibit these carbon (C) exchanges on an annual timescale. For years that experience low annual rainfall but increased continuous rainfall, a decrease in ET may inhibit plant respiration, thus enabling subtropical forest ecosystems to fix more C. Additionally, more intense and irregular rainfall patterns caused by climate change may weaken the overall C sequestration capacity of subtropical forest ecosystems. Results from this study are intended to help us better understand coupled C and water cycling mechanisms within terrestrial ecosystems, while also providing a reference to assess the impact of climate change on ecosystem C cycling processes.
资助项目	National Nature Science Foundation of China[31988102] ; National Nature Science Foundation of China[41830860] ; National Nature Science Foundation of China[41922003]
WOS关键词	INTERANNUAL VARIABILITY ; SEMIARID ECOSYSTEMS ; DIOXIDE EXCHANGE ; CO2 ; STOICHIOMETRY ; PRECIPITATION ; PLANTATION ; VEGETATION ; CYCLE ; SINK
WOS研究方向	Chemistry ; Geochemistry & Geophysics
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000613199500008
资助机构	National Nature Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/160619]
专题	中国科学院地理科学与资源研究所
通讯作者	Gao, Yang
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lu, Yao,Gao, Yang,Sun, Kun,et al. How Carbon Footprint Responds to Water Circulation Rates and Availability at Different Timescales in a Subtropical Forest Ecosystem[J]. ACS EARTH AND SPACE CHEMISTRY,2021,5(1):77-87.
APA	Lu, Yao.,Gao, Yang.,Sun, Kun.,Lyu, Sidan.,Wen, Xuefa.,...&Wang, Shuoyue.(2021).How Carbon Footprint Responds to Water Circulation Rates and Availability at Different Timescales in a Subtropical Forest Ecosystem.ACS EARTH AND SPACE CHEMISTRY,5(1),77-87.
MLA	Lu, Yao,et al."How Carbon Footprint Responds to Water Circulation Rates and Availability at Different Timescales in a Subtropical Forest Ecosystem".ACS EARTH AND SPACE CHEMISTRY 5.1(2021):77-87.