Analysis of Land Use Patterns on Carbon Emission and Carbon Footprint in Chongqing City

Take Chongqing for example,based on statistics area of data of land use patterns and data of energy consumption from 1997 to 2009,the paper estimated carbon emission and energy carbon footprint of different land use patterns by using carbon emission model and carbon footprint model,and analyzed effects of carbon emission,influencing factors of carbon emission and changes of carbon footprint of energy consumption.The conclusions can be drawn as follows:(1)The total carbon emission was linear increasing with an annual rate of 210.69×104 t.(2)The main carbon source was construction land and the main carbon sink was woodland,the increase of carbon emission of construction land was far greater than woodland.(3)Carbon emission intensity decreased continuously,from 1.77 t/104 Yuan in 1997 falling to 1.38 t/104 Yuan in 2009,with an annual decreased rate of 1.12%,lower than the increase rate of GDP which was 11.5%.(4)Industrial structure and economic growth could promote carbon emission,energy structure had little influence on carbon emissions,the improvement of energy efficiency was the key reason of carbon emission intensity in Chongqing decreased continuously from 1997 to 2009.The total carbon footprint of energy consumption increased year by year with an annual speed of 93.75×104 hm2 since 2002,ecological carrying capacity also increased,but far less than the rate of increase of total carbon footprint,so the ecological deficit had expanded each year;forest carbon footprint and coal energy carbon footprint were the main carbon footprint.