Based on remote sensing data, we analyzed the spatial and temporal dynamic change characteristics of vegetation and meteorology in Yan'an City in the past 20 years, and explored the factors affecting the change of vegetation index. The results showed that the vegetation index of Yan'an City ranged from 0.54 to 0.75 from 2000 to 2019, and its spatial distribution showed the characteristics of high in the south and low in the north, which was consistent with the distribution of land use types in Yan'an City, and in the temporal distribution, it showed a significant upward trend, and the overall rate of increase was 0.095/(10a); during the period of 2000~2019, 79.83% of the areas of Yan'an City had an improved vegetation trend, and degraded areas accounted for 0.34% of Yan'an city. In summary, the vegetation index of Yan'an city showed an increasing trend.
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Yang et al. (2024) studied this question.
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