Spatial And Temporal Characteristics Of Forest Carbon Sink Efficiency And Influencing Factors In China

Since the proposal of the "dual-carbon" goal,forest carbon sinks have received much attention as the most efficient and economical measure in a certain range.China attaches great importance to forest greening and has long been engaged in afforestation,which has led to a sustained and rapid growth of forest carbon sinks.However,it should be noted that this growth is backed by a significant amount of resources.Under the long-term extensive mode of forestry development,there may be a severe shortage of resources.Therefore,it is necessary to study the efficiency of forest carbon sinks towards providing them more efficiently,i.e.,how to achieve more forest carbon sink output with as little input as possible.By researching the overall level of forest carbon sink efficiency in China,we can grasp the development space of forest carbon sinks and meet the requirements of China’s high-quality development model.Through the analysis of influencing factors,targeted suggestions can be made.In this article,based on the theory of economic growth,an input-output index for the efficiency of forest carbon sinks is constructed.The non-radial and non-directional DEA-SBM model is used to evaluate the level of forest carbon sink efficiency in China from 2005 to 2018.Secondly,the global Moran’s I and local Moran’s I spatial analysis methods are introduced to explore the correlation of forest carbon sink efficiency in spatial distribution and the Arc GIS software is used to further analyze the spatiotemporal evolution of forest carbon sinks.Finally,a spatial econometric model is established to examine the factors affecting the efficiency of forest carbon sinks.The research results show that firstly,the overall measured efficiency of forest carbon sinks in China is not high,and there are significant differences between regions.Secondly,the efficiency of forest carbon sinks shows a high degree of correlation in spatial distribution,and there are many provinces of the "low-low,low-efficiency" type.Thirdly,there is a spatial spillover effect of forest carbon sinks.Based on this,the following policy suggestions are proposed: to develop a coordinated development strategy and improve the efficiency of forest carbon sinks according to local conditions;to strengthen regional cooperation and attach great importance to the spatial correlation of forest carbon sinks;to improve the institutional mechanism and transform the extensive growth mode of forest carbon sinks.However,this article also has some shortcomings: it did not include other related indicators that have strong correlations into the input-output index system of forest carbon sink efficiency;it did not discuss the convergence problem in spatial analysis;it did not conduct individual research on influencing factors in a specific region;the use of linear interpolation to fill in the missing year may lead to errors in results.