Research on the spatio-temporal variation of vegetation carbon sink and its correlation with climate in the Qinling Mountains of Shaanxi

doi:10.13474/j.cnki.11-2246.2024.0911

Abstract

Abstract: The Qinling Mountains in Shaanxi province are an important ecological security barrier in China, studying the spatio-temporal changes in vegetation net ecosystem productivity and its correlation with climate is of great significance for explaining changes in vegetation carbon sinks.The article is based on the google earth engine cloud computing platform, using net primary productivity data, temperature data, precipitation data, and solar radiation data, and Theil-Sen Median regression analysis, coefficient of variation, partial correlation analysis are used to analyze the spatio-temporal changes in vegetation net ecosystem productivity and the correlation between climate factors in Qinling Mountains of Shaanxi province from 2000 to 2021.The results indicate that:①From 2000 to 2021,the net ecosystem productivity of vegetation in Qinling Mountains of Shaanxi province showed a spatial distribution pattern of high in the west and low in the east,gradually decreasing from the west to the east.The average annual net ecosystem productivity is 595.91 gC/(m²·a), and most of it is in carbon sink areas(NEP>0).②From 2000 to 2021, the average trend coefficient of net ecosystem productivity of vegetation in Qinling Mountains of Shaanxi province was -0.007, and the trend change showed a stable state.③From 2000 to 2021, the stability of vegetation net ecosystem productivity in Qinling Mountains of Shaanxi province showed significant heterogeneity in spatial distribution, with 92.03% of the area continuing to serve as a carbon sink.④From 2000 to 2021, 92.62% of the vegetation area in Qinling Mountains of Shaanxi province showed a positive correlation between regional net ecosystem productivity and precipitation, 54.34% of the vegetation area showed a positive correlation with solar radiation, and 96.63% of the vegetation area showed a positive correlation with temperature, indicating that temperature is the most important climate factor affecting the region. This article has positive significance for improving the carbon sink value of ecosystems and achieving China's “dual carbon” goals as soon as possible.

Key words: Qinling Mountains in Shaanxi, vegetation carbon sink, spatio-temporal variation, climate correlation

CLC Number:

P237

ZHAO Xuan, ZHANG Xiangyang, LIU Guofa, WANG Tenglong. Research on the spatio-temporal variation of vegetation carbon sink and its correlation with climate in the Qinling Mountains of Shaanxi[J]. Bulletin of Surveying and Mapping, 2024, 0(9): 55-61.

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