[1]Yao Nan,Dong Guotao,Xue Huazhu.Analysis on the Characteristics of the Spatiotemporal Change in Vegetation Coverage on the Loess Plateau Using the Google Earth Engine[J].Research of Soil and Water Conservation,2024,31(01):260-268.[doi:10.13869/j.cnki.rswc.2024.01.045]
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Analysis on the Characteristics of the Spatiotemporal Change in Vegetation Coverage on the Loess Plateau Using the Google Earth Engine
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 01
Page number:
260-268
Column:
Public date:
2024-02-20
- Title:
- Analysis on the Characteristics of the Spatiotemporal Change in Vegetation Coverage on the Loess Plateau Using the Google Earth Engine
- Keywords:
- vegetation coverage; Google Earth Engine; lagged correlations; climate change; Loess Plateau
- CLC:
- Q948
- DOI:
- 10.13869/j.cnki.rswc.2024.01.045
- Abstract:
- [Objective] This study aims to explore the vegetation cover change and its response of climate factors for coping with global climate change and promoting the ecological protection and high-quality development of the Loess Plateau. [Methods] Based on NDVI, temperature and precipitation data of the Loess Plateau from 2001 to 2020, pixel dichotomy, linear regression and time lag partial correlation analysis models were used to characterize the vegetation cover change on the Loess Plateau and its response mechanism to climate factors. [Results] The annual vegetation coverage in the Loess Plateau had increased at a rate of 0.076/decade in past two decades with a predominantly significant spatial distribution of pronounced growth. The areas of vegetation cover that fluctuated greatly accounted for 38.29% of the whole area. The relationship between monthly vegetation cover, temperature and precipitation on the Loess Plateau was significantly positive correlation, and precipitation was the main factor affecting vegetation change. The lag time of vegetation response to precipitation was mainly 3 months, and the lag time of vegetation response to temperature existed spatial differences between southeast(0～1 month)and northwest(2～3 months). [Conclusion] The vegetation changes in the Loess Plateau were primarily influenced by precipitation. Over the course of 20 years, there had been a favorable recovery of vegetation. However, there were significant fluctuations in this change. Future efforts should continue to focus on ecological conservation work in order to ensure the consolidation of these improvements.
- References:
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Last Update:
2024-02-20