Study On Land Use Carbon Emission And Interregional Carbon Compensation In Guangxi

Land use change affects the process of global climate change and carbon cycle.To carry out research on land use carbon emission and interregional carbon compensation is of far-reaching significance to optimize the spatial pattern of the territory and promote the coordinated development of regional low-carbon.In this paper,109 districts and counties in Guangxi were selected as the research object.Based on land use data and night light data,carbon emissions under different land use modes in Guangxi were calculated from 2005 to 2020.The spatio-temporal variation characteristics and spatial agglomeration were analyzed,and the causes of spatial differentiation were further explored with the help of geographic detectors.Based on the calculation of carbon emissions of land use,this paper explains the principle of carbon compensation for land use,determines the principle and subject of carbon compensation,quantifies the carbon compensation value of each district and county by building a carbon compensation model,and then uses the carbon compensation priority index to prioritize and regionalize it,discusses the selection of carbon compensation methods,and puts forward policy suggestions on the construction and improvement of carbon compensation for land use.So it tries to construct the operation mechanism of land use carbon compensation in Guangxi.The main research conclusions are as follows:(1)From 2005 to 2020,the total carbon emission of land use in Guangxi showed a trend of constant increase and decrease of total carbon absorption,but the speed and intensity of carbon emission decreased.In the change of carbon emission structure,construction land is the main source of carbon emission,and forest land is the main carbon sink.The spatial distribution of net emissions is obvious,and the high-value emissions and high-value emissions are mainly concentrated in central Guangxi.The low-value emission and low-value emission are distributed in the districts and counties of west,north and northeast Guangxi.Total energy consumption,regional investment level and land use degree were the main factors affecting the spatial differences of land use carbon emissions,while the number of permanent residents,per capita GDP and industrial structure had a weak influence.(2)From 2005 to 2020,the spatial agglomeration effect of land use carbon emissions in Guangxi was obvious,and Moran’s I value showed a V-shaped fluctuation state,which first decreased and then increased.In the local autocorrelation analysis,high-high(HH)and low-low(LL)clusters were dominant in the study area.The high-high(HH)agglomeration pattern is mainly distributed stably in the Beibu Gulf city cluster and Liuzhou industrial city.Low-low(LL)agglomeration is distributed stably in the districts and counties of northern Guangxi,and extends from west to east in northern Guangxi,showing "belt" and "cluster" agglomeration.High-low(HL)and low-high(LH)clusters were scattered around high-high(HH)and low-low(LL)clusters(3)In the calculation of carbon offset value,the spatial distribution of carbon offset credits of different districts and counties is significantly different.The compensation areas are mainly distributed in the districts and counties with rich ecological local resources and strong carbon sequestration capacity in western,northern and eastern Guangxi.The payment zones are concentrated in the districts and counties in central,southern and southeastern Guangxi with relatively concentrated population and frequent economic activities.The payment amount of the payment zones accounts for little of the GDP of each district and county in that year,and will not bring financial pressure to each district and county.Carbon compensation is one of the forms of ecological compensation.Due to the obvious differences in "compensation" and "compensation" between different regions of land use,carbon compensation can further narrow the economic development gap between regions.Therefore,it is meaningful and necessary to study carbon compensation from the perspective of land use.(4)The districts and counties with the largest amount of carbon offsets are the last regions to make payments.According to the carbon offsets priority index,the districts and counties in Guangxi are divided into priority payment areas,secondary payment areas,potential payment areas,priority compensation areas,secondary compensation areas and potential compensation areas.Different carbon compensation preferences are explored for different levels of compensation areas.The compensation methods available in Guangxi include "capital + policy + land use index","capital +project + land use index" and "capital + material + technology",which are applicable to priority compensation areas,secondary compensation areas and potential compensation areas respectively.(5)The calculation of carbon offsets value takes full account of the economic capacity of the payment area,and quantifies the urgency of carbon offsets of each district and county through the carbon offsets priority index,and proposes the corresponding development plan and the combination preference of carbon offsets according to local conditions for the priority,secondary and potential compensation(payment),which not only realizes the optimal allocation of resources.It also promoted the coordinated development of economy and ecological environment among different regions and solved the conflicts between them.In addition,suggestions such as perfecting laws and regulations,coordinating the participation of multiple subjects,establishing land use "carbon source-carbon sink" account,and improving financing channels provide a guarantee for the smooth operation of the land use carbon compensation mechanism in Guangxi.