气象与环境学报2026，Vol.42Issue(3)：92-99,8.DOI:10.3969/j.issn.1673-503X.2026.03.010
鄂尔多斯市生长季植被指数变化及其对气候的响应
Changes of NDVI and its response to climate factors in Ordos City during the growing season
摘要
Abstract
Ordos City is located in a transitional zone between grassland and desert,with a fragile and sensitive eco-logical environment.In order to study the dynamic changes of vegetation and its response to climate factors,MOD13Q1 data with a resolution of 250 m and meteorological observation data from 2000 to 2023 were used.Theil Sen trend analysis and Mann Kendall test were applied,combined with coefficient of variation,Hurst index,and correlation coefficient to analyze the spatiotemporal variation characteristics,stability,sustainability,and re-sponse mechanism of NDVI in the growing season of Ordos City to climate factors.The results showed that the av-erage NDVI in the growing season of Ordos was 0.269,and the growth rate was 0.045/10 a.The significant in-crease area accounted for 75.03%of the total area of the city,mainly located in the eastern region and the sandy land in the north.The average coefficient of variation of NDVI was 0.18,indicating that the overall stability of vegetation was weak,and vegetation growth was vulnerable to external environment;The average Hurst index was 0.44,indicating that the NDVI may show an anti sustainable downward trend in the future.The effect of precipita-tion on vegetation growth was greater than that of temperature,and the area with significant positive correlation be-tween NDVI and precipitation accounted for 48.77%,mainly distributed in grassland and sandy land in the West;The proportion of regions with significant positive correlation between NDVI and temperature was 20.15%,which is mainly located in the grassland and farmland with relatively abundant precipitation in the Middle East.The monthly scale analysis showed that the water and heat conditions in July had an important impact on the vegetation growth,and the precipitation in July showed a continuous positive promoting effect on the vegetation growth in the current month and subsequent August and September,while the temperature in July showed a negative inhibiting effect.关键词
植被指数/趋势分析/气候因素/Hurst指数Key words
Vegetation index/Trend analysis/Climate factors/Hurst index分类
农业科技引用本文复制引用
张彩云,王涵,焦志荣,项飞录,张连霞,刘婷..鄂尔多斯市生长季植被指数变化及其对气候的响应[J].气象与环境学报,2026,42(3):92-99,8.基金项目
鄂尔多斯市科技计划项目(2022YY018)和内蒙古自治区自然科学基金(2024LHMS04018)项目共同资助. （2022YY018）
