| Global warming,environmental pollution and other related to human survival and health issues more and more attention by society,China is in rapid economic development,infrastructure expansion,artificial adjustment of land use,destruction of the biosphere carbon cycle,and further lead to global warming caused by human activities,the atmospheric CO2 increase after the energy of fossil fuels Nanchang city as the first batch of low-carbon pilot city China,located in the east longitude 115°27?~116°35?,located in the north latitude 28°09?~29°11?,where is the capital city of Jiangxi Province,with a history of more than 2 thousand and 200 years,Jiangxi province is the administrative,economic and cultural center.This study is based on remote sensing,GIS technology and R / S model analysis.Firstly,the area and proportion of land use types in Nanchang from 2000 to 2015 are analyzed.Then,by comparing the relevant literatures and comparing the corresponding model calculation methods,the model of Nanchang is selected,which is based on the local climate Condition and the difficulty of data acquisition to determine the emission coefficient,calculated from the selected time span correlation data,through the four stages of land use changes in carbon emissions from the number of analysis,followed by the use of R / S model description and other research,The main conclusions are:(1)During the study period,the general trend of land use in Nanchang can be summarized as follows: the area of construction land has been continuously increased,the area of cultivated land has been reduced on a large scale,and the area of grassland and unused land has been decreasing.In the aspect of change speed,the construction land from the early rapid expansion to recent years,the rate of increase has slowed,cultivated land and unused land from the early rapid reduction in recent years to reduce the rate of decline in the trend of In the gentle,garden land of grassland and waters of the volatility is more gentle.(2)With the rapid economic growth and industrialization of Nanchang,urbanization continues to advance,infrastructure construction,Nanchang carbon emissions increased significantly.From the beginning of the study 183.49 × 104 t growth to the end of the study 1056.93 × 104 t,has gone through three different stages.The first stage(2000-2005): the level of industrialization in the early stage of economic development is low,carbon emissions are also in a period of relatively slow growth,the average annual carbon emissions of 26.6 × 104 t.The second stage(2005-2010): economic development began to take off a substantial increase in the level of industrialization,carbon emissions in the ultra-high growth period.Specifically,the carbon emissions from the initial growth of 316.48 × 104 t to the end of the 1278.06 × 104 t,more than three times more than growth.The third stage(2010-2015): the pace of economic development has declined a lot of carbon emissions accounted for a large proportion of the industry began to relocate,the total carbon emissions into a fall period,from 1278.06 × 104 t in 2010 down to 2015,1056.93 × 104 t,indicating that Nanchang in the development of the economy but also take into account energy-saving emission reduction.(3)Nanchang City,a variety of land use types of carbon emissions significantly different.The total carbon emissions are the construction land,and the carbon emissions account for more than 95% of the total carbon emissions.The carbon emissions increased rapidly from 183.49 × 104 t in 2000 to 1056.93 × 104 t in 2015,with an average annual growth rate of 58.23 × 104 t.As can be seen from Table 4-2,Nanchang City,the future for a long time to build land or a major carbon source.The main carbon sinks in Nanchang were garden land and water land,but the area change was small during the whole study period,and the total amount of carbon sinks increased from 10.57 × 104 t to 11.05 × 104 t,an increase of 4.54%,and the growth rate was basically neglected.Because the carbon uptake of water and forest land is very different from that of construction land,the carbon sink effect of other land types is not obvious.From the carbon emissions of land use types,it can be seen that the carbon emissions of cultivated land is larger than that of woodland,water,grassland and unused land,and the total amount of carbon is relatively large,so the five types of land use The source(or carbon sink)effect has little effect on the overall regional carbon emission effect.(4)Based on the R/S model analysis results show that: Nanchang City in the energysaving emission reduction,the development of green economy,circular economy efforts are obvious,in the next ten years,carbon emissions will be with the science and technology,The total emissions declined year by year. |
PDF Full Text Request