Spatial-temporal Variability of Carbon Budget in the Yangtze River Delta Region and Carbon Balance Zoning

SHEN Rui; WANG Li; JIANG Yuhang; YANG Yinan; WANG Yuan

doi:10.19672/j.cnki.1003-6504.1705.24.338

Abstract：It is of great significance to explore the characteristics of spatial dynamics of carbon balance at the scale of urban agglomeration and to determine the carbon balance zoning for realizing the regional low-carbon coordinated development.Based on the land use and energy consumption data of 41 cities in the Yangtze River Delta(YRD)region,the spatial and tem-poral patterns of carbon balance in the YRD region from 2005 to 2020 are investigated,and the spatial carbon balance of each city in the YRD region is analyzed by using the Gini coefficient,the economic contribution coefficient,and the ecological support coefficient,and on the basis of which,carbon balance zoning is carried out and targeted strategies are proposed from both the economic and ecological perspectives.Based on this,the carbon balance region is divided from economic and ecologi-cal perspectives and targeted strategies are proposed.The results show that:(1)from 2005 to 2020,the spatial pattern of carbon emission in the YRD region is"high in the east and low in the west",with an increasing trend year by year,while carbon ab-sorption shows a spatial distribution of"high in the south and low in the north",with a relatively small change in amplitude.Carbon absorption shows a spatial distribution of"high in the south and low in the north"with a relatively small change.(2)During the study period,the carbon offset rate in the YRD region decreased significantly,the Gini coefficient of the carbon off-set rate was high,the YRD region was facing a greater pressure on the carbon balance,the intensity of carbon emissions de-creased steadily,and the Gini coefficient of the intensity of carbon emissions shifted from a"relatively coordinated"to a"rela-tively uncoordinated"situation.The Gini coefficient of carbon emission intensity has changed from"relatively coordinated"to"relatively uncoordinated".(3)The economic contribution coefficient and ecological carrying coefficient have significant spatial heterogeneity among cities,with the economic contribution coefficient gradually decreasing from the coast to the in-land,and the ecological carrying coefficient showing the spatial characteristics of"high in the south and low in the north".(4)Based on the economic benefits of carbon emissions and ecological carrying capacity reflected in the carbon balance analy-sis,cities are divided into low-carbon economic zones,carbon intensity control zones,carbon sink functional zones and high-carbon optimization zones,and differentiated low-carbon development proposals are put forward for each region.