[Land Use Carbon Emission Change and Coordination Zoning in the Middle Reaches of Yangtze River Economic Zone].

Carbon emissions from land use have become one of the hotspots in global climate change research, and their impact is second only to carbon emissions from fossil energy combustion. Taking 325 county units in the middle reaches of the Yangtze River economic zone as the research object, the change rules and spatial characteristics of land use carbon emissions from 2000 to 2022 were explored. On this basis, coordinated zoning was carried out, and targeted strategies were proposed. The results showed that： ① From 2000 to 2022, the net carbon emissions in the study area showed a fluctuating and rising trend. From 2000 to 2010, the average annual growth rate was approximately 1 322.47×104 t； from 2010 to 2015, the growth rate slowed down； and the net carbon emissions in 2020 were reduced by 414.54×104 t compared with those in 2015. It was expected to gradually recover from 2020 to 2022. ② The spatial pattern of land use carbon emissions showed significant regional differences, with Wuhan, Changsha, and Nanchang County as the high-value core. The spatial distribution pattern of net carbon emissions increased significantly in most districts and counties from 2000 to 2022, but the Le'an, Yihuang, Hefeng, Suining, Yuanling, and Shennongjia forest areas maintained very low carbon emissions for many years. ③ The economic contribution coefficient of carbon emissions was higher in the west and south and lower in the east and north, and the coefficient interval showed a significant growth trend. The number of county units with less high values but a coefficient less than 1 increased from 149 in 2000 to 231 in 2022, and the regional gap of economic efficiency of carbon emissions increased. ④ The carbon ecological carrying coefficient distribution was concave in space, showing lower carbon ecological carrying coefficients in the northern districts and counties with Wuhan metropolitan area as the core than those in the southern, eastern, and western regions. During the study period, the maximum carbon ecological carrying coefficient first increased and then decreased, reaching a peak of 28.11 in 2015. ⑤ According to the carbon emission economic contribution coefficient, carbon ecological carrying coefficient, and net carbon emission in the study area over the years, the 325 county units were divided into carbon sink functional zones （11）, low-carbon economic zones （8）, low-carbon maintenance zones （57）, economic development zones （126）, carbon intensity control zones （44）, and high-carbon optimization zones （79）, and differentiated low-carbon development strategies were proposed. District-based regulation is conducive to promoting coordinated emission reduction among counties in the middle reaches of the Yangtze River economic zone, promoting regional low-carbon economic development, and creating a model for regional linkage carbon emission reduction.