Carbon Emission Effect Of Transformation Of Land Use In Shanghai

In recent years, with the continuous progress of urbanization process, the greenhouseeffect which caused by greenhouse gas emissions is gradually enhanced, and has brought alot of environmental problems, seriously affected the quality of the environment. Thereason of this phenomenon is largely due to human activities. Numerous studies havedemonstrated that human activities affected the carbon cycle of terrestrial ecosystems bythe way of changing land use types. Therefore, focusing on the study of carbon emissionseffect of land use change can provide a theoretical basis for the effective implementationof carbon reduction measures, so that to further improve the living environment of humanbeings and to achieve harmony between man and nature.As Shanghai is a typical representative of the international metropolis in China, hasbeen in a period of high-speed economic development, and its land-use change significantly,the paper selected Shanghai as a research object, based on the statistic data of farmland,garden, woodland, urban green spaces, grassland, unused land and construction land areaand energy consumption as coal, oil, natural gas and so on, using related carbon emissionsmodel, we accounted carbon absorption, carbon emissions and net carbon emissions ofvarious land use types in Shanghai for separately, tried to put a carbon emissions inventoryof Shanghai, then made correlation and regression analysis for land use change and carbonemissions, the study results showed that:(1) Shanghai was in the state of carbon imbalancefor a long time, its net carbon emissions has been showing a positive value since1996, upto6070.07kt;(2) Construction land is the major source of carbon emissions, its carbonintensity of2011is228.16t/ha; farmland is the main bearer of carbon sequestration, theaverage annual carbon absorption is1271.94kt; followed by woodland and garden, theaverage annual carbon uptake were113.76kt and47.92kt;(3) There is a correlation betweenland use change and carbon emissions. The total amount of carbon uptake and farmland aresignificantly correlated, its correlation coefficient up to0.996; Secondly are garden andwoodland, grassland and unused land were the lowest; However, the correlation coefficientbetween construction land the total carbon emissions is the highest, up to0.998;(4)In regression, the highest goodness of fit is construction land, up to0.9979; followed by farmland, R2value is0.9967; the minimum is unused land, only0.3924.Based on these research results, and at the same time in response to “low-carboneconomy” requirements, the paper has given some measures and recommendations on optimizing the land use structure of Shanghai and reducing carbon emissions to minimizeenvironmental interest damage while developing economy and balance the conflictsbetween land use competition between urban development and ecological conservation.