干旱区生态环境知识资源中心(Arid): Spatiotemporal dynamics of vegetation net ecosystem productivity and its response to drought in Northwest China

Arid

DOI	10.1080/15481603.2023.2194597
	Spatiotemporal dynamics of vegetation net ecosystem productivity and its response to drought in Northwest China
	Cao, Shengpeng; Yi, He; Zhang, Lifeng; Sun, Qiang; Zhang, Yali; Li, Hongzhe; Wei, Xiao; Liu, Yaoxiang
通讯作者	Yi, H
来源期刊	GISCIENCE & REMOTE SENSING
ISSN	1548-1603
EISSN	1943-7226
出版年	2023
卷号	60 期号:1
英文摘要	Net ecosystem productivity (NEP) quantifies magnitude of the terrestrial vegetation carbon sinks. Drought is one of the most important stressors affecting vegetation NEP. At present, the spatiotemporal dynamics of vegetation NEP in drought-prone of Northwest China (NWC) lack discussion under different climatic zones and land cover types, and the response of vegetation NEP to drought remains unclear. Hence, we estimated the vegetation NEP in NWC using ground and remote sensing data and quantified the spatiotemporal differentiation of NEP under different climatic zones and land cover types. The drought fluorescence monitoring index (DFMI) was developed to examine the relationship between vegetation NEP and drought response based on the solar-induced chlorophyll fluorescence (SIF) data. Our results suggested that vegetation carbon sinks increased significantly at 7.09 g C m(-2) yr(-1) in NWC during 2000-2019, mainly in northern Shaanxi, eastern and southern Gansu, and southern Ningxia. NEP showed increasing trends under different climatic zones and land cover types, but there were differences in carbon sink capacity. The strongest carbon sink capacity was in humid regions and forests, while the weakest was in arid regions and grasslands. The vegetation carbon sinks showed a non-linear relationship with the drought degree reflecting multiple trend differences, especially in forests and grasslands. The response to drought was faster and more significant in semi-arid and semi-humid transition zones and extreme humid regions when vegetation carbon sinks decreased. DFMI was a good indicator to monitor drought conditions in NWC. NEP and DFMI were an 8-20-month periodic positive correlation and showed a high correlation with high-high and low-low clustering spatially. Drought significantly weakened vegetation carbon sinks in NWC. This study emphasizes the demand to rapidly identify climatic conditions that lead to decrease significantly in vegetation carbon sinks and to formulate adaptation strategies aimed at reducing drought risk under global warming.
英文关键词	Vegetation NEP SIF wavelet coherence remote sensing Northwest China
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:000969056300001
WOS关键词	INDUCED CHLOROPHYLL FLUORESCENCE ; REMOTE-SENSING ESTIMATION ; PHOTOSYNTHESIS ; VARIABILITY ; STRESS ; IMPACT ; GROWTH ; TREND ; MODEL ; STATE
WOS类目	Geography, Physical ; Remote Sensing
WOS研究方向	Physical Geography ; Remote Sensing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/396758
推荐引用方式 GB/T 7714	Cao, Shengpeng,Yi, He,Zhang, Lifeng,et al. Spatiotemporal dynamics of vegetation net ecosystem productivity and its response to drought in Northwest China[J],2023,60(1).
APA	Cao, Shengpeng.,Yi, He.,Zhang, Lifeng.,Sun, Qiang.,Zhang, Yali.,...&Liu, Yaoxiang.(2023).Spatiotemporal dynamics of vegetation net ecosystem productivity and its response to drought in Northwest China.GISCIENCE & REMOTE SENSING,60(1).
MLA	Cao, Shengpeng,et al."Spatiotemporal dynamics of vegetation net ecosystem productivity and its response to drought in Northwest China".GISCIENCE & REMOTE SENSING 60.1(2023).