Effects of Landuse Change on Spatial and Temporal Patterns of Carbon Sources/Sinks in Huainan Mining Area from 2000 to 2020

Abstract

[Objective] The spatial and temporal distribution characteristics of land use carbon sources/sinks in the Huainan mining area from 2000 to 2020 were analyzed, in order to provide a basis for Huainan City’s territorial spatial planning and future low-carbon regulation policy formulation. [Methods] The study was conducted in the Huainan mining area. Grid-scale land use data in 2000, 2010, and 2020 were used to quantify the spatial and temporal patterns of carbon sources/sinks/emissions under different stages of land use change development. The spatial patterns of carbon sources/sinks/emissions were determined based on coldspots and hotspots. [Results] ① From 2000 to 2020, the land use type shifted from a single land use type to multiple land use types at the same time. The area of construction land increased, leading to an enhanced carbon source effect, a relatively weaker carbon sink effect, and a continuous increase in carbon emissions, with an annual increase in carbon sources of 2.76×106 t, an annual increase in carbon sinks of only 130 t, and an annual increase in carbon emissions of 2.76×106 t. ② The spatial distribution characteristics of carbon sources and emissions were basically the same, with the central built-up area and the northwest mining area being the main concentration areas of carbon sources and emissions. Carbon sinks were mainly concentrated in the eastern and western fringe areas and the western mining area. ③ The central built-up area of the study area was a significant hotspot area for carbon sources and emissions, dominated by significant hotspot change characteristics. Significant coldspots were mainly located in the eastern and western marginal areas of the study area and in the northwest part of the mining area. [Conclusion] Greater attention should be given to the carbon emission reduction and low carbon effect of the Huainan mining area in the large plain area of farm land in the north, as well as to controlling the mining of coal resources, to the development of construction land, and to rapid restoration of subsidized water areas. With the rapid increase of urbanization in Southern China, the area of productive carbon absorption capacity from forest land and grassland should be moderately increased to avoid unlimited expansion of construction land.

Keywords

• land use
• carbon source/sink
• carbon emission
• coldspot and hotspot
• huainan mining area