[1]Spatiotemporal Variation of NDVI and Its Response to Changes in Temperature and Precipitation in Guizhou Province[J].Research of Soil and Water Conservation,2021,28(02):118-129.
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Spatiotemporal Variation of NDVI and Its Response to Changes in Temperature and Precipitation in Guizhou Province
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
118-129
Column:
Public date:
2021-02-06
- Title:
- Spatiotemporal Variation of NDVI and Its Response to Changes in Temperature and Precipitation in Guizhou Province
- Keywords:
- NDVI; stability; sustainability; temperature; precipitation; Guizhou Province
- CLC:
- Q948
- DOI:
- -
- Abstract:
- In order to explore the characteristics of vegetation NDVI change and its response to temperature and precipitation changes, Guizhou Province was taken as an example, based on the MODIS NDVI data and temperature and precipitation data from 2000 to 2018, anomaly analysis, moving average, M-K test, univariate linear regression trend Analysis, Pearson correlation analysis, partial correlation analysis, complex correlation analysis, and F test for significance test were used to quantitatively analyze the effects of temperature and precipitation on vegetation NDVI under different landform types in Guizhou Province. The results showed that:(1)from 2000 to 2018, the annual average NDVI of Guizhou Province showed a pattern of low northwest and high southeast; the NDVI was abrupt in 2007 and 2010, and entered a period of rapid growth in 2013; the area was relatively large in the karst canyon area and the rift basin area, and the non-karst area is smaller;(2)NDVI was dominated by medium-high stability and medium stability, and there was a spatial pattern which coefficient of variation was higher in northwest than southeast; non-karst topography had the highest stability, and the stability of karst canyon was poor;(3)the Hurst index was between 0.07 and 0.99; the high values mainly distributed in the western part of Guizhou Province, and the low values mainly distributed in the eastern part; the areas of forward direction sustainability were greater than half of the corresponding areas both in the karst canyon area and the rift basin area, the area ratio of the remaining geomorphic areas in the reverse direction was relatively large;(4)the average annual temperature of Guizhou Province presented a spatial pattern that was lower in the western region and higher in the southern region, rising at a rate of 0.260℃/decade; the temperature change in the rift basin area was the most stable, and the temperature changes in the non-karst area and the karst trough area were quite different; the precipitation in most areas of Guizhou was relatively high, only slightly lower in the northwestern part of the study area; the annual average precipitation rose at a rate of 38.16 mm/decade; except for fault depression basins, precipitation tended to decrease, and other geomorphic areas showed the increase with varying degrees;(5)the effect of temperature on NDVI in Guizhou Province was stronger than that of precipitation, and the impacts of temperature and precipitation on NDVI in rift basin areas were not significant; the impact of temperature on NDVI was higher than that of precipitationin karst plateau area, karst canyon area and non-karst area.
- References:
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Last Update:
2021-02-10