| In recent decades,the global climate changes increasingly rapid,human survival and development is facing rigorous challenges,the problem of global warming has become a major issue about the continuous development of human society,which must break through quickly.It is found that the traditional fossil energy consumption and the carbon emission caused by the change of land use structure are the main influencing factors of greenhouse effect.Therefore,this paper analyzes the carbon emission effect of land use change from the perspective of research on the different types of carbon.The carbon emission efficiency of land use in each county was studied by Arc GIS visualization classification,and the carbon emission efficiency of land use change was studied from three aspects:carbon intensity per capita carbon intensity,carbon intensity of carbon output per unit area and carbon intensity per unit area In-depth analysis,the Zhengzhou city and other counties around the city’s carbon emissions and its strength were compared to study its core active role.At the same time,the core carbon emission intensity area is further studied,and the relationship between the expansion of construction land and the carbon intensity of Zhengzhou urban land is discussed,and the carbon emission effect of different types of construction land is studied deeply.The research and determination of carbon emission coefficient of land use in different land areas is a prerequisite for estimating the total amount of land use and carbon emissions in the region.It plays a cornerstone role in the whole land use carbon emission effect research.Therefore,this paper first draws on the previous research methods and The carbon emission coefficient of cultivated land in Zhengzhou is-25t C·ha·a-1,the carbon emission coefficient of grassland is-1.5446 t C·ha·a-1,and the carbon emission coefficient of cultivated land is 0.6534 t C·ha·a-1,unused land and water carbon emission coefficients were determined by previous studies,-0.005 t C·ha·a-1 and-0.253 t C·ha·a-1,respectively.Construction of carbon emissions on the use of its energy consumption for direct accounting,construction land in different years the intensity of carbon emissions are not the same,resulting in the annual construction of carbon emissions coefficient are different,this article is no longer given.The results of this study show that:（1）From 1995 to 2015,the land use structure of Zhengzhou City has changed significantly.Among them,the construction land,water and grassland area growth rate is more obvious,arable land,woodland and unused land as a whole show a slow reduction trend.The relevant indicators show that the impact of human activities on land use/cover change in Zhengzhou is gradually increasing,and the balance between the various types of land is gradually increasing,but at the same time facing the development trend of disorderly development.（2）The total carbon use of land use in Zhengzhou increased continuously from 3496529 tons in 1995 to 23006930 tons in 2015,an increase of 558 percent,with an average annual growth rate of 975,520 tons.Among them,the energy consumption accounted for93.6%-98.8%of the total carbon source ratio showed a leading role,woodland carbon uptake accounted for about 96%of the total carbon sinks showed a leading role.（3）The intensity of per capita carbon emissions in Zhengzhou district has experienced a rising and then rising slowly rising,while the surrounding cities and counties have continued to rise,and there has been a sudden rise in 2010-2015,and beyond the per capita carbon intensity of each district;The intensity of carbon emission in the urban area of Zhengzhou City dropped sharply from 2000 to 2005,while the large rate of change in the surrounding cities and counties appeared between 2005 and 2010,indicating that there was a lag effect between the economic development and carbon emissions in the surrounding cities and counties.There is a positive correlation between the intensity of carbon emission per unit area and the level of economic development,which is in line with the growth trend of the first half of the environmental Kuznets inverted U-shaped curve,and the zoning of Zhengzhou urban area is a high concentration area of carbon emission per unit area.（4）There is a significant Kuznets curve relationship between the total area of the land for construction and the carbon intensity,and there is still a positive correlation between the two areas,but the inflection point has not yet appeared in the short term.There is a significant Kuznets curve between the industrial storage land and the carbon emission intensity,and the inflection point appears in the industrial storage area,which accounts for 5.07%of the total area of the study area.There is a significant linear positive correlation between the traffic area and carbon intensity,the residential land and carbon intensity,the municipal commercial public facility land and carbon intensity. |
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