| In recent years, climate change, especially global warming, has been a serious challenge humanity is facing nowadays and is a global environmental problem recognized by the international community. However, the which greenhouse effect is enhanced and become the key factor for global warming. Since the industrial revolution, the content of the atmospheric carbon dioxide has increased by25%-30%. Many studies have confirmed that the impact of carbon emission is largely due to change of land use patterns cause human activities. Therefore, the exploration of the background value of the carbon emission under different land use patterns and analysis of the land use quantitative relationship between the land use change and the carbon emissions can provide a theoretical basis for reducing carbon emission. And it has significance for the realization of the development of the low-carbon economy and creation of the two orient society.This paper selected Wuhan City as the research object,because its economic has rapidly developed in recent years and the land-use has change dramatically. According to the data of land use change and energy consumption of Wuhan city from1996to2009, the land use carbon emissions over the years has been calculated making use of the relevant econometric model under the basis of the existing carbon emissions research related to land use and the variation trend of the carbon emission is analyzed in detail. In the meanwhile, on the basis of the measurement methods, gray correlation analysis model and decoupling theory, the relationships have been researched in the thirteen years including: land use structure change and construction land use intensity, benefit change and carbon emission. The research results show:(1)The carbon emission of Wuhan City land use shows growth overall from1996to2009. The trend can be divided into three stages:stable fluctuation period (1996-2002), rapid growth period (2002-2006), gentle decline period (2006-2009).(2) Different land use types play various production or consumption functions of carbon dioxide. Construction land is the main carbon source, accounts for99percent of total carbon emission, and rapidly grow. The carbon consumption function of woodland, grassland, orchard and water is obviously deficiencies and cannot be able to offset the rapid growth for the construction land carbon emission. Therefore, the future emission reduction focus of Wuhan City should be on maintaining or increasing carbon consumption land use types and reducing the carbon emissions of construction land at the same time.(3) The relationship between land use construction and land use carbon emission of Wuhan City exists differences and not shows a long-term stable connection. The land use change of carbon emission shows three stages:low effect stage, high effect stage and negative effect stage. When carbon mission is in the high effect stage, the total1%change in the level of construction land should be efficient in carbon emission by548,900tons. Construction land at the stage has a significant impact advantage. So strengthening the construction land regulation at this stage can effectively control the excessive growth of carbon emission.(4)Wuhan City shows the overall relative decoupling state between the construction land intensity or efficiency and construction land carbon emission. Because the effects of construction land use intensity and efficiency for carbon emission are various, the decoupled state shows a large difference in different periods. In order to improve the process of construction land use intensification in the high effect stage of carbon emissions, the control of the construction land use intensity and effect should be increased. It is necessary to gradually get rid of the dependence on the development model of the high energy consumption and high emission and to further the implement the energy conservation emission reduction policy. |
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