Temporal And Spatial Simulation Of The Carbon Footprint Of Land Use Change In Western Jilin

One of the most critical influencing factors is land use change, which not only hasa significant influence on vegetation carbon sink and surface soil carbon sink, but alsoarouses the loss of deep soil inert carbon sink. Greenhouse gas emission caused by landuse behaviors has become the second largest greenhouse gas emission sources exceptfossil fuel combustion emission. Compared with carbon emission concepts usedfrequently in former researches, the research of carbon footprint can reflect influencesand pressure level on environment caused by human activities.Referred to the accounting method in "2006IPCC Guidelines for NationalGreenhouse Gas Inventories" and land use/cover change research, this paper analyzescarbon footprint of region land use change and reveals the characteristics and rules ofthe region carbon incoming and outgoings and the temporal and spatial variationthrough establishing region carbon footprint estimation model on the basis of3Stechnology, which provide the scientific support of land use structure optimizationbased on the low carbon and carbon emission reduction.Through the the remote sensing image explanation of Landsat TM satellite, weachieve the land use/cover change information of research region from1989to2008and achieve the land use change transfer matrix with Spatial overlay analysis function toanalyze the reciprocal transformation among various land types. The results show thatfarmland, woodland, residential land and saline-alkali soil land have an increasingtrendency while grassland, water boy, wetland, bottomland and desert have a decreasingtrendency. In the recent20years, research region land use structure has a great change,land use types spatial transformation mainly reflects as follows: dry farmlandtransforms to woodland and grassland, grassland transforms to dry farmland, grasslandand wetland degenerates to low and medium coverage grassland or develops into dryfarmland etc.Referred to the classification and accounting method in "2006IPCC Guidelines forNational Greenhouse Gas Inventories", this paper proposed integrated model of land usechanges including vegetation carbon footprint and soil carbon footprint betweendifferent types of land use conversion and single type of land use. Farmland andgrassland types remain unchanged, the soil organic carbon storage increased anddecreased respectively. The soil organic carbon storage increase when the soiltransformed into farmland, forest land and water bodies, soil organic carbon storage decrease when the soil transformed into saline alkali soil and sand.For the The trend of land use changes carbon footprint has been gradually decreaseyear by year from1989to2008, the overall performance of terrestrial ecosystemscarbon sinks in research area is carbon sinks. Vegetation carbon stocks has a strongcarbon sink function, but the overall performance of soil carbon poolas is carbon sourcewhen land use types are changing. Land use change carbon footprint of Jilin westernarea hasa large discrepancy in spatial distribution. The large land use changes carbonfootprint area mainly distribute in central and southwestern of research area and otherarea of Fuyu County, The small land use changes carbon footprint area mainly distributein northwestern of research area, western of Qianguo County, wetland nature reserveand the central of Daan County. The largest and the smallest land use changes carbonfootprint are respectively in Fuyu County and Qianguo County. The woodland areadiminishing, grassland degradation, waters shrinking, saline and sandy area increasinglead to the increasing of carbon footprint and the diminishing of the carbon sinks.For the characteristics of research region land use change carbon footprint, thispaper put forward the measures such as strengthen the management and supervision ofagricultural production, change the traditional farming methods, change the animalhusbandry and aquaculture management style, implementing ecological restoration andmanagement engineering, constantly optimize the land use structure, reduce carbonemissions and increase forest carbon sinks. The results can provide the theoreticalfoundation and scientific basis of establishing regional land use carbon emissionreduction policies.