Carbon emission of regional land use and its decomposition analysis: Case study of Nanjing City, China

Abstract

In this paper, we study on the relationship between economic growth and land use and carbon emission in Nanjing from 2005 to 2014 shows that the economic growth and the carbon use of land use in Nanjing are not completely decoupled, that is, the change of land use carbon emissions with economic growth Showing an upward trend. Research proposals: Therefore, under the new normal situation of economic and social development, explore the use of low-carbon recycling economy-oriented land resource utilization and management model for the promotion of ecological civilization in Nanjing to provide new development ideas. 1 Research methods and data sources 1.1 Calculation of land use carbon emissions Land use of carbon emissions can be divided into two types，one is due to different types of land use caused by direct carbon emissions, and second, carrying human activities caused by indirect carbon emissions. The land use carbon emissions in this paper refer to direct carbon emissions, which are derived from cultivated land, other agricultural land, woodland, garden land, pasture land, construction land, water area and unused land. The land use carbon emission coefficient is affected by soil type way, farming habits and other aspects of the impact, with greater uncertainty. For the need for quantitative research, the following formula is introduced. Estimation of carbon emissions in cultivated land, woodland, garden, pasture, water and unused land : í µí±Š = ∑í µí±† í µí±– í µí±„ í µí±– (1) In Eqs.(1), W is the total amount of carbon emissions of six types of cultivated land, forest land, garden land, pasture land, water area and unused land; í µí±† í µí±– is the area of the i land type; í µí±„ í µí±– is the carbon of the ith land Emission coefficient, according to the relevant literature, the carbon emission coefficient of cultivated land is 0.40 tc/ hí µí±š 2 , and the carbon emission coefficients of garden land, forest land, grassland, water area and unused land are-0.39

Spatial-temporal dynamics of carbon emissions and carbon sinks in economically developed areas of China: a case study of Guangdong Province

“…Due to data limitation, carbon sinks of water bodies and barren land were also excluded. With reference to existing research 23 , 31 , vegetation carbon sinks of land cover were measured by using carbon sink factors and corresponding land cover area, which provided a simple and practical method for the calculation of multi-scale carbon sinks. The formula for estimating the annual carbon sinks of land cover from 2005 to 2013 is shown in Eq.…”

“…Those studies presented various views on the relationships between carbon emissions and land use by discussing natural carbon processes of LULCC and the impacts on anthropogenic carbon emissions by LULCC. The carbon dynamics caused by LULCC could be investigated through the division of different land use/land cover types, and carbon emission effects of different land use/land cover types could thus be accurately explored 23 . However, previous studies were mainly focused on carbon emissions taking place on a single land-use type, such as carbon emissions resulting from agricultural land utilization 24 or built-up land construction 25 , neglecting to establish the whole carbon estimation system based on land use/land cover 23 .…”

“…Furthermore, a comprehensive comparison between carbon emissions and carbon sinks of land use/land cover remains lacking. Meanwhile, due to data limitation, there were few reports on continuous time series estimation of regional land-use carbon emissions, which is of critical importance for local governments to formulate or adjust carbon reduction policies in a timely manner 23 .…”

“…Nevertheless, in economically developed regions like Guangdong Province, due to the relatively high degree of urbanization, although LULCC during the most recent years is not dramatic compared with other rapidly developing regions, carbon emissions of land use are still very large. This is because a considerable amount of carbon emissions could be originated from many sources in addition to LULCC, including mechanized agricultural tillage and urban construction driven by human economic activities 23 , 31 . Both are associated with carbon emissions resulting from energy consumption and industrial production.…”

Tracking the Spatial–Temporal Evolution of Carbon Emissions in China from 1999 to 2015: A Land Use Perspective

“…A comprehensive carbon emissions estimation system based on land use remains poorly documented at the provincial level in China. Moreover, due to data limitation, little research has calculated provincial carbon emissions of land use on a consecutive time series basis, which is considered to be of great significance for the development of carbon reduction policies and their timely adjustment [19]. China has won global attention for its tremendous progress in economic development since the implementation of reform and opening-up policies in 1978, with the population urbanization rate rising from 17.9% in 1978 to 57.96% in 2017 [20].…”