干旱区生态环境知识资源中心(Arid): Spatiotemporal characteristics of drought and its impact on vegetation in the vegetation region of Northwest China

Arid

DOI	10.1016/j.ecolind.2021.108420
	Spatiotemporal characteristics of drought and its impact on vegetation in the vegetation region of Northwest China
	Cao, Shengpeng; He, Yi; Zhang, Lifeng; Chen, Yi; Yang, Wang; Yao, Sheng; Sun, Qiang
通讯作者	He, Y (corresponding author), Lanzhou Jiaotong Univ, Fac Geomat, Lanzhou 730070, Peoples R China. ; He, Y (corresponding author), Natl Local Joint Engn Res Ctr Technol & Applicat, Lanzhou 730070, Peoples R China. ; He, Y (corresponding author), Gansu Prov Engn Lab Natl Geog State Monitoring, Lanzhou 730070, Peoples R China.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2021
卷号	133
英文摘要	As one of the extreme climate events, the frequency and intensity of drought's change significantly affect the growth of regional vegetation. Drought events have occurred frequently in the Vegetation Region of Northwest China (VRNWC) in the past 20 years, but the spatiotemporal characteristics of drought lack discussion in VRNWC. Additionally, the response mechanism of vegetation activities to drought is unclear. In this study, the Theil-Sen median trend and Mann-Kendall test correlation analysis were combined to analyse the spatiotemporal characteristics of drought in VRNWC based on the Standardized Precipitation Evapotranspiration Index (SPEI) from 2000 to 2019. Morlet wavelet and Hurst (H) exponent were used to analyse the future prediction of drought in VRNWC. The effects of drought on vegetation change were further analysed using the Normalized Difference Vegetation Index (NDVI). The results showed that from 2000 to 2019, the SPEI in VRNWC increased at the rate of 0.0113/ a, and the drought slowed down, mainly distributed in northeastern Shaanxi, southern Gansu, southern Qilian Mountains, and western Xinjiang. However, there was extreme drought in the northwest of the Tarim Basin in 2007 and severe drought in the northern Qaidam Basin in 2014. In the past 20 years, the occurrence frequency, duration and percentage of drought grade of slight drought, moderate drought, and severe drought showed a downward trend. The VRNWC gradually developed to a wetting trend, but the overall frequency of slight drought was the highest, and the frequency of extreme drought was the lowest, while severe drought was mainly concentrated in the Qinghai Plateau. The drought in VRNWC had a periodicity of about 8a. Further, SPEI_Hurst indicated that the drought in the study area will probably increase in the future. Drought in VRNWC significantly impacted vegetation, and 72.36% of the regional SPEI was positively correlated with the NDVI. This study provides a theoretical basis and data support for ecological management and future ecological restoration in vegetation regions.
英文关键词	Drought Standardized precipitation evapotranspiration index Normalized difference vegetation index RS and GIS Vegetation region of 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:000728758100004
WOS关键词	LOESS PLATEAU ; CLIMATE-CHANGE ; ARID REGION ; EVAPOTRANSPIRATION ; EVOLUTION ; TRENDS
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374003
作者单位	[Cao, Shengpeng; He, Yi; Zhang, Lifeng; Chen, Yi; Yang, Wang; Yao, Sheng; Sun, Qiang] Lanzhou Jiaotong Univ, Fac Geomat, Lanzhou 730070, Peoples R China; [Cao, Shengpeng; He, Yi; Zhang, Lifeng; Chen, Yi; Yang, Wang; Yao, Sheng; Sun, Qiang] Natl Local Joint Engn Res Ctr Technol & Applicat, Lanzhou 730070, Peoples R China; [Cao, Shengpeng; He, Yi; Zhang, Lifeng; Chen, Yi; Yang, Wang; Yao, Sheng; Sun, Qiang] Gansu Prov Engn Lab Natl Geog State Monitoring, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Cao, Shengpeng,He, Yi,Zhang, Lifeng,et al. Spatiotemporal characteristics of drought and its impact on vegetation in the vegetation region of Northwest China[J],2021,133.
APA	Cao, Shengpeng.,He, Yi.,Zhang, Lifeng.,Chen, Yi.,Yang, Wang.,...&Sun, Qiang.(2021).Spatiotemporal characteristics of drought and its impact on vegetation in the vegetation region of Northwest China.ECOLOGICAL INDICATORS,133.
MLA	Cao, Shengpeng,et al."Spatiotemporal characteristics of drought and its impact on vegetation in the vegetation region of Northwest China".ECOLOGICAL INDICATORS 133(2021).