Regional Difference and Spatial Convergence of Land Use Carbon Emissions in Three Urban Agglomerations of Yangtze River Economic Belt

It is of great significance to explore the regional differences of land use carbon emission（LUCE）in the Yangtze River Economic Belt and the path of coordinated emission reduction for regional sustainable development. Based on the LUCE estimation method，this study scientifically calculated the LUCE of the three major urban agglomerations of the Yangtze River Economic Belt（Yangtze River Delta，middle reaches of the Yangtze River，and Chengdu-Chongqing urban agglomeration）from 2010 to 2020. Kernel density estimation and the spatial convergence model were used to study the dynamic evolution，regional differences，and convergence characteristics of LUCE. The results showed that：① The carbon absorption of forest land，water areas，grassland，and unused land were relatively small in terms of carbon emissions from cultivated land and construction land. The carbon emission of construction land increased gradually，whereas the carbon absorption of four carbon sinks fluctuated little during the study period. ② The core density curves of different urban agglomerations showed different distribution patterns，extensibility，and polarization characteristics but generally tended to be balanced. ③ From 2010 to 2020，the LUCE of the Yangtze River Economic Belt as a whole showed the spatio-temporal characteristics of increasing first and then decreasing and high in the east and low in the west. The LUCE of the central cities of the three urban agglomerations were at the highest level steadily，and stable coupling mechanisms had not been established between the economic development level and the ecological environment. ④ The LUCE of the three urban agglomerations in the Yangtze River Economic Belt all had absolute β convergence and also had conditional β convergence under the model control variables such as economic development level，urbanization level，industrial structure，population density，and environmental regulation，etc.，and the conditional convergence speed was greater than the absolute convergence speed in each region. The convergence speed of the Yangtze River Delta urban agglomeration was the slowest. The above conclusions provide support for the coordinated emission reduction path of the three urban agglomerations in the Yangtze River Economic Belt and are also conducive to actively and steadily promoting the realization of the goals of carbon peak and carbon neutralization. © 2024 Science Press. All rights reserved.