[1]LIU Wei,JIAO Shulin,LI Yinjiu,et al.Analysis on the Correlation Between Vegetation Cover of Land Surface and Climatic Factors in Karst Area[J].Research of Soil and Water Conservation,2021,28(03):203-215.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 03
Page number:
203-215
Column:
Public date:
2021-04-20
- Title:
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Analysis on the Correlation Between Vegetation Cover of Land Surface and Climatic Factors in Karst Area
- Author(s):
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LIU Wei, JIAO Shulin, LI Yinjiu, MO Yueshuang, ZHAO Zongquan, ZHANG Jie, ZHAO Meng
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(College of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China)
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- Keywords:
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vegetation cover; climatic factors; spline function method; correlation analysis; Guizhou Province
- CLC:
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Q948
- DOI:
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- Abstract:
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Understanding the temporal and spatial variation of vegetation and its relationship with climatic factors can provide some basis for vegetation restoration and protection in ecologically fragile areas. Based on meteorological data and time series data of vegetation NDVI, the temporal and spatial variation characteristics of vegetation NDVI from 1998 to 2018 in Guizhou Province were analyzed by spline function method and correlation analysis method, and the correlation between vegetation NDVI and temperature and precipitation in different time periods was discussed. The results show that:(1)from 1998 to 2018, vegetation NDVI increased at a rate of 6.4×10-3 /a(p<0.01), and the spatial distribution pattern was high in the south and low in the north, high in the east and low in the west;(2)from 1980 to 2018, the temperature increased significantly at a rate of 0.23℃/decade(p<0.01); except for the negative growth rate in summer, the temperature in other seasons increased at different rates;(3)from 1980 to 2018, the annual cumulative precipitation decreased as a whole at a rate of -10.71 mm/decade(p>0.1), in which precipitation increased in the spring while the precipitation decreased in the other seasons;(4)from 1998 to 2018, the significant increase of vegetation NDVI was closely related to climate warming, but weakly related to precipitation; the increase of temperature or the decrease of precipitation in summer and autumn was conducive to vegetation growth;(5)in the four seasons, the weakest vegetation NDVI sensitivity was about 0.20 in winter when it was about 6.5℃, and the sensitivity to temperature was not obvious in the other seasons; the sensitivity to precipitation was different in each season, and the inhibition effect was most obvious in winter, with the r value of about -0.80. In general, the vegetation coverage in Guizhou Province is good, showing an increasing trend, and the correlation with temperature is higher than the cumulative precipitation, but the sensitivity is weaker.