Research On Changes Of Carbon Source And Carbon Sink In Jiangxi Province In The Past Two Decades

The carbon cycle process is closely related to human activities.Cities are concentrated areas of human activities.The study of urban carbon balance is of great significance to the implementation of regional green coordinated development strategies.Jiangxi Province has produced drastic climate changes against the background of global warming.During the 14 th Five-Year Plan period,Jiangxi Province will take "carbon peaking" and "carbon neutrality" as the goals,and "carbon reduction" as a starting point.Global climate change promotes regional green and coordinated development.Based on the carbon cycle theory,using GIS,ENVI and other tools and geographic information related research methods,this paper calculates the carbon source/carbon sink of Jiangxi Province from 2000 to 2018 on the basis of the interpretation of the third-phase remote sensing image of Jiangxi Province.Analyze the temporal and spatial evolution trends of carbon sources/sinks and carbon surplus and losses in Jiangxi Province,study the main influencing factors of carbon emissions and carbon sinks in Jiangxi Province,provide suggestions for reducing emissions and increasing sinks,and achieve low-carbon economy and scientific planning Provide data support and theoretical basis.Through research,we found:(1)From the analysis of changes in carbon sources,since 2000,the carbon emissions of Jiangxi Province have been increasing at an average annual growth rate of 7.98%,and are divided into two growth stages with 2009 as the node.The second growth stage is obvious Slow down.The carbon intensity of Jiangxi Province continues to decline,and the energy use efficiency and economic conversion efficiency are lower than that of Jiangsu in the same period and higher than that of Henan in the same period.(2)Judging from the land use changes in the three phases of 2000,2009,and2018 in Jiangxi Province,the area of cultivated land,woodland,and grassland decreased by 5.26%,0.91%,and 6.78%,respectively,and the surface area of water bodies and artificial land increased by 20.44% and 20.44%,respectively.105%.In terms of spatial distribution,more than half of Jiangxi is forest land.Cultivated land is mainly concentrated in the Poyang Lake Plain.Grassland is mainly distributed in Ganzhou and Ji’an in the south-central Ganzhou.The grassland area in Ganzhou and Ji’an is 51% of Jiangxi.(3)From the perspective of changes in carbon sinks,the overall carbon sink capacity in 2018 was significantly weaker than in the other two periods.The ranking of carbon sink capacity in 2018 is: Pingxiang > Jingdezhen > Ganzhou > Ji’an >Fuzhou > Jiangxi > Shangrao > Jiujiang > Yichun > Xinyu > Yingtan > Nanchang.The carbon sink capacity of Nanchang is obviously out of touch with other cities.From the perspective of spatial distribution,the carbon sink pattern of Jiangxi Province is high in the south and low in the north,while the surrounding cities are high and the internal cities are low.(4)From the perspective of carbon profit and loss,Jiangxi Province was in a state of carbon surplus in the three periods of 2000,2009,and 2018.The amount of carbon surplus was gradually decreasing,but the reduction rate has slowed down.The spatial pattern has characteristics of north-south distribution,and the carbon surplus gradually decreases from south to north,and then from the surrounding cities in northern Jiangxi to the inner cities.