A Study On The Temporal Characteristics And Influential Factors Of Land-Use Carbon Emission In Wuhan

Carbon emission has caused global warming and has been concerned world widely, China also offer to reduce carbon emission, but with the industrialization and rapid urbanization, China will increase energy consumption and need more construction land, which produce more carbon emission. It will cause more pressure on China’s carbon reduction. Recently, Wuhan has made remarkable achievements on social and economic development and urban construction. So Wuhan is faced with contradiction between land demand and rural land conservation. We study the influential factors of land-use carbon emissions in Wuhan, which can help us find the fundamental solutions to reduce land-use carbon emissions.Firstly according to the data of various land use types and energy consumption from2002to2012in Wuhan, this paper calculates net carbon emissions and related indicators and analyzes the time series of total carbon emissions and per capita carbon emissions, summarizing changes in the characteristics of its development. We find that construction land and cultivated land are carbon source, and other land types researched are carbon sinks; The carbon emission of construction land determines the net carbon emission of Wuhan, at the same time, we can find the development of Wuhan highly relies on energy consumption; then we based on the relationship between per capita carbon emissions and economic development, we estimate the situation of decoupling of Wuhan, found that Wuhan is mostly above the level of the expansion decoupling through the entire study period.Secondly, this paper use improved Kaya identity and LMDI decomposition method to decompose the net carbon emissions factors. Thus we get five factors:carbon emission intensity of per unit land, land use structure, land-use intensity of per unit GDP, per capita GDP and population scale. Then we use LMDI decomposition method to calculate the contribution value and the contribution rate of various factors on net carbon emissions, at the same time, analyze various factors’effects on net carbon emission through the entire study period. The five factors of which pull carbon emission growth are:per capita GDP> land use structure> population scale; of which restrain carbon emission growth are: land-use intensity of per unit GDP> carbon emission intensity of per unit land. Overall, the pulling effect is greater than the inhibition, showing growth of carbon emissions.Finally, according to previous studies we summarize the main conclusions, and present the corresponding policy suggestions in four angles:economic development, land use, population scale and the government’s macro-control.