干旱区生态环境知识资源中心(Arid): Characteristics of spatial and temporal dynamics of vegetation and its response to climate extremes in ecologically fragile and climate change sensitive areas

Arid

DOI	10.1016/j.catena.2024.107910
	Characteristics of spatial and temporal dynamics of vegetation and its response to climate extremes in ecologically fragile and climate change sensitive areas - A case study of Hexi region
	Zhang, Jun; Guan, Qingyu; Zhang, Zepeng; Shao, Wenyan; Zhang, Erya; Kang, Tingting; Xiao, Xiong; Liu, Hanqi; Luo, Haiping
通讯作者	Guan, QY
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2024
卷号	239
英文摘要	Climate extremes significantly affects vegetation dynamics, and understanding the relationship between dryland vegetation and climate extremes is crucial for regional ecological security and disaster warning. According to meteorological and satellite remote sensing data, the paper analyses the dynamics of normalized difference vegetation index (NDVI) and climate extremes in the Hexi region from 2000 to 2020 using Theil-Sen Median, Mann-Kendall and linear regression methods; the relationship between climate extremes and vegetation dynamics is revealed using Pearson correlation and boosted regression trees (BRT) models. On this basis, the timelag effect of NDVI in response to climate extremes was further investigated. The results show that the NDVI in the Hexi region increased from 2000 to 2020, with significant greening (67.72 %) and a small amount of degradation concentrated in the desert in the northwest and the oasis in the southeast. The correlation between climate extremes indicators and NDVI shows a large spatial heterogeneity, with extreme precipitation showing a high importance for all regions except oasis. NDVI has no lag or 1 month lag for extreme temperature, no lag for max 1-day precipitation amount (Rx1day) for areas other than mountainous areas, and a 3-month lag for max 5-day precipitation amount (Rx5day) for extensive areas. The results of this study could serve as a reference for the study of the relationship between vegetation dynamics and climate extremes in arid and semi-arid regions, and provide a theoretical basis for the establishment of scientific and reasonable strategies for regional vegetation restoration and conservation.
英文关键词	NDVI Climate extremes Correlation Relative influence Time-lag effect
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001197574200001
WOS关键词	ATMOSPHERIC CIRCULATION ; PRECIPITATION EXTREMES ; ARID REGION ; LAND-COVER ; TEMPERATURE ; CHINA ; DESERTIFICATION ; TRENDS ; PLATEAU ; WATER
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403138
推荐引用方式 GB/T 7714	Zhang, Jun,Guan, Qingyu,Zhang, Zepeng,et al. Characteristics of spatial and temporal dynamics of vegetation and its response to climate extremes in ecologically fragile and climate change sensitive areas - A case study of Hexi region[J],2024,239.
APA	Zhang, Jun.,Guan, Qingyu.,Zhang, Zepeng.,Shao, Wenyan.,Zhang, Erya.,...&Luo, Haiping.(2024).Characteristics of spatial and temporal dynamics of vegetation and its response to climate extremes in ecologically fragile and climate change sensitive areas - A case study of Hexi region.CATENA,239.
MLA	Zhang, Jun,et al."Characteristics of spatial and temporal dynamics of vegetation and its response to climate extremes in ecologically fragile and climate change sensitive areas - A case study of Hexi region".CATENA 239(2024).