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[1]Huang Yan,Song Haiqing,Hu Qi,et al.Spatial-temporal Dynamics of NDVI and Its Response to Hydrothermal Conditions in Inner Mongolia from 2000 to 2020[J].Research of Soil and Water Conservation,2024,31(04):197-204,213.[doi:10.13869/j.cnki.rswc.2024.04.006]

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Spatial-temporal Dynamics of NDVI and Its Response to Hydrothermal Conditions in Inner Mongolia from 2000 to 2020

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 04 Page number: 197-204,213 Column: Public date: 2024-06-30

Title:: Spatial-temporal Dynamics of NDVI and Its Response to Hydrothermal Conditions in Inner Mongolia from 2000 to 2020

Author(s):: Huang Yan¹, Song Haiqing², Hu Qi³, Wu Hao¹, Lu Jiayue¹, Li Biyun¹; (1.Ulanqab Meteorological Bureau, Ulanqab, Inner Mongolia 012000, China; 2.Ecological and Agricultural Meteorology Center of Inner Mongolia Autonomous Region, Hohhot 010051, China; 3.College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China)

Keywords:: NDVI; spatiotemporal variation; hydrothermal conditions; Inner Mongolia

CLC:: P49; P463.22

DOI:: 10.13869/j.cnki.rswc.2024.04.006

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.

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Last Update: 2024-06-30