Abstract:

The study of the spatial and temporal differentiation pattern of land use carbon emission is of great significance for guiding the regional realization of carbon neutral goals. Based on the remote sensing images and energy consumption data of Heilongjiang Province from 1980 to 2020, this paper analyzed the current situation of land use, the temporal and spatial pattern of carbon emissions and the risk of carbon emissions in Heilongjiang Province by using the calculation model of land use carbon emissions and the calculation model of carbon emissions risk index, combined with the land use transfer matrix, ArcGIS spatial analysis and other methods. The results showed that the main land types in Heilongjiang Province were cultivated land and construction land, and the area increased year by year. Construction land was the main carbon source. Forest land, grassland and water area decreased year by year, and forest land was the most important carbon sink. From 1980 to 2020, the carbon emissions of land use in Heilongjiang Province increased in varying degrees. In terms of carbon sources, the total carbon sources showed a fluctuating upward trend; in terms of carbon sinks, the total carbon sinks decreased year by year. From 2000 to 2020, the total carbon emissions of each city increased to varying degrees, of which the growth rate was fast from 2000 to 2010, and slower from 2010 to 2020. From 2000 to 2020, the spatial difference of carbon emissions of each city was gradually significant, and the risk level increased year by year. Based on the relevant analysis results, this paper aims to provide reference for the low-carbon land use model and carbon emission reduction policy of Heilongjiang Province, and provide decision support for the realization of China’s “dual carbon” goal.

Key words: land use, carbon emissions, space-time differentiation, Heilongjiang Province