Assessing vegetation dynamics and influencing factors in Northwest China’s Arid Regions: a spatiotemporal analysis using NDVI (2000–2020)

IF 2.1 4区地球科学

Acta Geophysica Pub Date : 2025-05-07 DOI:10.1007/s11600-025-01576-8

Haocheng Ke, Liang Liang, Menghan Tian, Maolin Wang, Chunhui Yuan, Yayu Gao

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引用次数: 0

Abstract

Vegetation is an essential component of the earth's ecosystem. Exploring the dynamic changes of NDVI and its influencing factors in the arid regions in Northwest China (NWAC) is of great significance to the restoration and management of the regional ecological environment. In order to study the law of NDVI change and its driving mechanism in the NWAC, MODIS NDVI data from 2000 to 2020 were used to explore the spatial and temporal characteristics and trends of NWAC NDVI by using Theil-Sen trend analysis, Mann–Kendall significance test, Hurst index and correlation analysis. Based on the analysis of NDVI, meteorological data and underlying surface data of NWAC from 2000 to 2020, the relationship between NDVI and driving factors was revealed by means of geographical detectors. The results indicate that the NDVI in the NWAC shows a significant upward trend (growth rate of 1.5 × 10³ per year). Approximately 10% of the NWAC was ecologically improved, while 3% was degraded. In addition, the future changes of NDVI in the NWAC are characterized by anti-persistence. Precipitation (q = 0.502) is the main factor affecting NDVI in the NWAC, and the interaction with other factors has the strongest effect on the spatial differentiation of NDVI in the whole region. The results of this study can help to better understand the intricate mechanism of vegetation change, and provide a scientific foundation for future vegetation restoration and rational implementation of ecological projects in the NWAC.

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2000-2020年中国西北干旱区植被动态及其影响因素的NDVI时空分析

植被是地球生态系统的重要组成部分。探讨西北干旱区NDVI的动态变化及其影响因素，对区域生态环境的恢复与治理具有重要意义。为了研究NDVI在NWAC的变化规律及其驱动机制，利用2000 - 2020年MODIS NDVI数据，采用Theil-Sen趋势分析、Mann-Kendall显著性检验、Hurst指数和相关分析，探讨NWAC NDVI的时空特征和变化趋势。在分析2000 - 2020年NDVI、气象资料和下垫面资料的基础上，利用地理探测器揭示了NDVI与驱动因子的关系。结果表明：NDVI呈显著上升趋势，年增长率为1.5 × 103；大约10%的NWAC生态得到改善，而3%的NWAC生态退化。此外，NDVI的未来变化具有反持续性特征。降水（q = 0.502）是影响NDVI的主要因子，与其他因子的交互作用对整个区域NDVI的空间分异影响最大。研究结果有助于更好地理解植被变化的复杂机制，为今后青藏高原植被恢复和生态工程的合理实施提供科学依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Geophysica GEOCHEMISTRY & GEOPHYSICS-

CiteScore

3.80

自引率

13.00%

发文量

251

期刊介绍： Acta Geophysica is open to all kinds of manuscripts including research and review articles, short communications, comments to published papers, letters to the Editor as well as book reviews. Some of the issues are fully devoted to particular topics; we do encourage proposals for such topical issues. We accept submissions from scientists world-wide, offering high scientific and editorial standard and comprehensive treatment of the discussed topics.