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Remote Sensing for Natural Resources    2025, Vol. 37 Issue (1) : 221-231     DOI: 10.6046/zrzyyg.2023226
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Responses of vegetation growth conditions to meteorological drought in Shanxi Province from 2000 to 2020
ZHAO Fu(), WANG Li(), MA Yuang, JIANG Ruixia
School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454003, China
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Abstract  

Based on the standardized precipitation index (SPI) and vegetation condition index (VCI) from 2000 to 2020, this study analyzed the trends in meteorological drought across different vegetation types in Shanxi Province using methods such as variational mode decomposition (VMD), Mann-Kendall trend analysis, and Pearson correlation coefficient. Accordingly, this study quantified the response time of vegetation growth conditions to meteorological drought. The results indicate that from the beginning of the 2000s, the overall meteorological drought in Shanxi Province has gradually eased. However, on a seasonal scale, areas with increasingly aggravated drought continuously expand from spring to winter. Meteorological drought has alleviated across various vegetation types, with the alleviation becoming increasingly significant with an increase in the time scale. In contrast, on a seasonal scale, the drought relief gradually weakens from spring to winter, during which drought aggravation progressively strengthens. Vegetation growth conditions are significantly influenced by meteorological drought. On the annual scale, there is a predominantly positive correlation between both. On the seasonal scale, areas with a strong correlation between both gradually contract from spring to winter, when such areas are dominated by the northwestern and northeastern areas of the province. Additionally, the response time of vegetation to drought is longer in spring and winter compared to autumn and summer. Across different vegetation types, the responses of vegetation growth conditions to meteorological drought prove the most rapid during the summer, and cultivated lands are identified as the most sensitive land type to meteorological drought.
Keywords SPI      VCI      meteorological drought      response relationship      Shanxi Province     
ZTFLH:  TP79  
  P461  
Issue Date: 17 February 2025
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Fu ZHAO
Li WANG
Yuang MA
Ruixia JIANG
Cite this article:   
Fu ZHAO,Li WANG,Yuang MA, et al. Responses of vegetation growth conditions to meteorological drought in Shanxi Province from 2000 to 2020[J]. Remote Sensing for Natural Resources, 2025, 37(1): 221-231.
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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2023226     OR     https://www.gtzyyg.com/EN/Y2025/V37/I1/221
Fig.1  Distribution of terrain, vegetation types and meteorological stations in Shanxi Province
Fig.2  Variation trend of SPI at the interannual and monthly scales
Fig.3  Variation trend of SPI at the seasonal scale
土地类型 类别 年 SPI1 SPI3 SPI12 春季 夏季 秋季 冬季
耕地 z① 0.604 0.609 1.693* 2.420** 1.419 0.635 -0.544 -0.974
s 0.044 0.001 0.002 0.003 0.046 0.033 -0.025 -0.031
草地 z 2.477** 1.075 2.818*** 6.555*** 1.359 1.178 0.030 0.616
s 0.082 0.001 0.003 0.006 0.049 0.048 0.002 -0.021
林地 z 0.967 0.407 1.439 2.461** 1.571 0.574 -0.574 -0.974
s 0.034 0.000 0.001 0.002 0.050 0.033 -0.025 -0.033
无植被区 z 1.298 0.753 2.141** 3.661*** 1.480 1.238 -0.513 -0.876
s 0.051 0.001 0.002 0.003 0.040 0.050 -0.027 -0.035
Tab.1  Variation trend of SPI at different scales under different vegetation types
Fig.4-1  VMD decomposition of grassland SPI in spring
Fig.4-2  VMD decomposition of grassland SPI in spring
Fig.5  Spatial distribution of correlation coefficient and significance test between interannual VCI and SPI12
Fig.6  Spatial distribution of maximum correlation coefficient between seasonal VCI and SPI at different time scales
Fig.7  Response time of seasonal VCI to SPI
Fig.8  The average value of the correlation coefficient between VCI and SPI with a time scale of 1 to 24 months
土地
类型		 4月 5月 6月 7月 8月 9月 10月
R 响应时
间/月		 R 响应时
间/月		 R 响应时
间/月		 R 响应时
间/月		 R 响应时
间/月		 R 响应时
间/月		 R 响应时
间/月
耕地 0.38 8 0.41 2 0.47 5 0.49 6 0.44 7 0.37 16 0.24 9
草地 0.49 15 0.47 16 0.46 5 0.50 6 0.49 19 0.46 16 0.43 9
林地 0.33 24 0.49 3 0.37 5 0.25 18 0.28 7 0.24 16 0.37 12
无植被区 0.32 7 0.29 8 0.41 5 0.38 6 0.27 10 0.21 16 0.16 10
Tab.2  Maximum correlation coefficients and corresponding time scales of growing seasons under different vegetation types
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