水土保持研究2024，Vol.31Issue(4)：197-204,213,9.DOI:10.13869/j.cnki.rswc.2024.04.006
2000-2020年内蒙古NDVI时空动态及其对水热条件的响应
Spatial-temporal Dynamics of NDVI and Its Response to Hydrothermal Conditions in Inner Mongolia from 2000 to 2020
摘要
Abstract
[Objective]The aims of this study are to understand the vegetation ecological status and dissect the factors affecting vegetation change.[Methods]Based on the MOD13A3 NDVI data and meteorological data,the spatiotemporal variation of NDVI and its response to hydrothermal conditions were analyzed by using the Theil-Sen median trend analysis,Mann-Kendall test,Hurst index and correlation analysis in order to provide a scientific basis for ecological conservation and rational resource allocation in this region.[Results]During the study period,NDVI in Inner Mongolia increased significantly(p＜0.01),and its spatial distribution was higher in the east and lower in the west.In most regions,NDVI showed an increasing trend.The growth rate of cultivated land was the largest and the proportion of cultivated land area with increasing trend was also the largest.The change of NDVI was relatively stable with low average coefficient variation,and the stability of forestland was the best.In the future,the change trend of NDVI in Inner Mongolia will be dominated by reverse sustainability,and the proportion of reverse sustainability and sustainability area will be 76.51％and 23.49％.The areas with negative correlation between NDVI and temperature accounted for 78.25％of the regions,and the areas with extremely significant and significant negative correlation between NDVI and temperature accounted for 19.92％of the regions.The areas with positive correlation between NDVI and precipitation and soil moisture accounted for 93.16％and 93.53％,and the areas with extremely significant and significant positive correlation between NDVI and precipitation and soil moisture accounted for 51.37％and 55.85％,respectively.[Conclusion]The overall vegetation ecology in Inner Mongolia showed a tendency towards improvement during the study period,and the vegetation ecology may deteriorate in the future.Soil moisture was the major effective factor on vegetation growth in Inner Mongolia.关键词
NDVI/时空变化/水热条件/内蒙古Key words
NDVI/spatiotemporal variation/hydrothermal conditions/Inner Mongolia分类
天文与地球科学引用本文复制引用
皇彦,宋海清,胡琦,吴昊,卢佳玥,李碧云..2000-2020年内蒙古NDVI时空动态及其对水热条件的响应[J].水土保持研究,2024,31(4):197-204,213,9.基金项目
国家重点研发计划重大自然灾害监测预警与防范专项(2018YFC1506606) （2018YFC1506606）
内蒙古自治区自然科学基金(2023QN05021) （2023QN05021）
内蒙古自治区科技计划项目(2021GG0415) （2021GG0415）
