气候变化领域集成服务门户(CCPortal): Study on the Spatial and Temporal Evolution of NDVI and Its Driving Mechanism Based on Geodetector and Hurst Indexes: A Case Study of the Tibet Autonomous Region

CCPortal

DOI	10.3390/su15075981
	Study on the Spatial and Temporal Evolution of NDVI and Its Driving Mechanism Based on Geodetector and Hurst Indexes: A Case Study of the Tibet Autonomous Region
	Wang, Jian; Zhao, Junsan; Zhou, Peng; Li, Kangning; Cao, Zhaoxiang; Zhang, Haoran; Han, Yang; Luo, Yuanyuan; Yuan, Xinru
发表日期	2023
EISSN	2071-1050
卷号	15 期号:7
英文摘要	The Tibet Autonomous Region (TAR) is located in the mid-latitude and high-cold regions, and the ecological environment in most areas is fragile. Studying its surface vegetation coverage can identify the ecosystem's development trends and provide a specific contribution to global environmental change. The normalized difference vegetation index (NDVI) can better reflect the coverage of surface vegetation. Therefore, based on remote sensing data with a resolution of 1 km(2), air temperature, precipitation, and other data in the same period in the study area from 1998 to 2019, this paper uses trend analysis, F-significance tests, the Hurst index, and the Geodetector model to obtain the spatial distribution, change characteristics, and evolution trends of the NDVI in the TAR in the past 22 years. At the same time, the quantitative relationship between natural and human factors and NDVI changes is also obtained. The study results show that the NDVI in the southern and southeastern parts of the TAR is higher, with mean values greater than 0.5 showing that vegetation cover is better. The NDVI in the western and northwestern parts of the TAR is lower, with mean values less than 0.3, indicating vegetation cover is worse. NDVI in the TAR showed an overall increasing trend from 1998 to 2019 but a decreasing trend in ridgelines, snow cover, and glacier-covered areas. The areas where NDVI values show a trend of increasing and then decreasing in the future account for 53.69% of the total area of the TAR. The most crucial factor affecting NDVI changes in the TAR is soil type, followed by influencing factors such as vegetation cover type, average annual air temperature, and average annual precipitation. The influence of natural elements is generally more significant than anthropogenic factors. The influencing factors have synergistic effects, and combining anthropogenic factors and other factors will show mutual enhancement and non-linear enhancement relationships. This study provides a theoretical basis for natural resource conservation, ecosystem restoration, and sustainable human development strategies in the TAR.
关键词	normalized difference vegetation index (NDVI)spatial-temporal distribution characteristics Hurst index Geodetector meteorological and social factors soil and land use types
英文关键词	CLIMATE; IMPACTS; TRENDS
WOS研究方向	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS记录号	WOS:000970431800001
来源期刊	SUSTAINABILITY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283385
作者单位	Kunming University of Science & Technology; Henan Polytechnic University; Chinese Academy of Sciences; Shanghai Ocean University
推荐引用方式 GB/T 7714	Wang, Jian,Zhao, Junsan,Zhou, Peng,et al. Study on the Spatial and Temporal Evolution of NDVI and Its Driving Mechanism Based on Geodetector and Hurst Indexes: A Case Study of the Tibet Autonomous Region[J],2023,15(7).
APA	Wang, Jian.,Zhao, Junsan.,Zhou, Peng.,Li, Kangning.,Cao, Zhaoxiang.,...&Yuan, Xinru.(2023).Study on the Spatial and Temporal Evolution of NDVI and Its Driving Mechanism Based on Geodetector and Hurst Indexes: A Case Study of the Tibet Autonomous Region.SUSTAINABILITY,15(7).
MLA	Wang, Jian,et al."Study on the Spatial and Temporal Evolution of NDVI and Its Driving Mechanism Based on Geodetector and Hurst Indexes: A Case Study of the Tibet Autonomous Region".SUSTAINABILITY 15.7(2023).