Effects of Region Land Use Change on Carbon Emission and its Spatial and Temporal Patterns, in Sichuan Province
The purpose in this paper id to study the effects of region land use change on carbon emission and its spatial and temporal patterns in recent 10years.This research helps to understand deeply the mechanism from human of regional carbon cycle,and can guide the economic and social development of low carbon from the land use planning,land development,industry structure regulation,etc..The methodology in this paper is the method of direct carbon emission coefficient and the adjusted carbon emissions calculation model based on data about land use change and energy consumption from 1996-2006 within Sichuan Province.The results show that:1) the carbon emissions amount increased year by year.The carbon emissions amount of land use change increased approximately 10.478％ (734.307 × 104t) in 1996-2006.2) The construction land is the main carbon sources,and the forest land is the main carbon sink.The carbon emissions amount increased approximately 10.339％ (812.454× 104t),and its amount in total carbon emissions amount is above 96％,the carbon sink amount increased by 44.742 × 104t,accounting for more than 94％ of carbon in Sichuan province.3) The regional difference of carbon emissions by land use is obvious.The carbon emissions in Chengdu plain is the largest,carbon emissions in Sichuan basin and hilly region take second place,the carbon emissions in western regions of mountainous and plateau were minimum values.The largest carbon emissions within the city or autonomous prefecture in Sichuan Province is Chengdu,Mianyang,Dazhou and Nanchong,the minimum carbon emissions is in Ganzi Tibetan autonomous prefecture,Aba Tibetan and Qiang autonomous prefecture and Liangshan Yi autonomous prefecture.4) There is a certain relation between the land use structure and carbon emissions,the land use types,such as the forest land,grassland,water area,and the unused land is carbon sink,the construction land and the cultivated land is carbon sources.The high value between the carbon sources and carbon sink lead to effect of carbon source far outweigh than carbon sink by land use.It is concluded that the carbon sink effect of the forest land is obvious in Sichuan Province,but the carbon source effect of the land use is much more than the carbon sink effect.Therefore,the focus of reduction the carbon emission in Sichuan Province should be keep or increase the existing forest land area,and meanwhile,mainly keeping reduction of the carbon emissions from the construction land.
land use changecarbon emissionspatial and temporal patternsSichuan Province
NETL
NSTL
万方数据
维普
