Analyses Of The Changes Of Landuse And Carbon Stocks In Terrestrial Ecosystem Of The Central Plains Economic Region From 2000 To 2010

As global climate change has a significant influence on artificial ecosystem and natural ecosystem, it has aroused wide concern from governments and the public. Carbon balance is the key factor of global warming and has been the hot topic. A lot of current literatures focus the reason of global climate change on the carbon balance. Terrestrial ecosystem is an important component of carbon balance. Carbon stocks in the terrestrial ecosystem are closely related to the global carbon cycle. Terrestrial ecosystem is relatively weak, and human activities have shaped the land use and land cover types. Hence, the carbon stocks in the terrestrial ecosystem have experienced radical changes in recent years. As one of the national strategies positioned by the State Council, the Central Plains Economic Region will be built as the paragon zone to coordinate agriculture, ecology and environment. Promoting new-type urbanization is the fundamental method to alleviate the current disparities in the resources, environment, population and economic and social development. However, new-type urbanization can obviously transform the land use and land cover types in the Central Plains Economic Region. Consequently, the carbon stocks in the terrestrial ecosystem of the Central Plains Economic Region have been changed and its value is uncertain.This paper obtained the land use data of the Central Plains Economic Region from 2000 to 2010 by the method of temporal decision and spatial decision. These data are derived from the source of LUCC and MODIS. Based on these data series and the regional carbon evaluation concept, this paper aims to analyze the carbon stocks in Central Plains Economic Region every year by InVEST model. Firstly, the projection coordinate system, the spatial resolution and the classification standard of the 3 period data of LUCC and 8 period data of MODIS data were unified. The LUCC and MODIS data were derived from two different data source. Secondly, we installed two kinds of analysis windows, namely, the size of 30km*30km for the main-window and the size of 500m*500m for the sub-window. In order to obtain the LUCC data, the rate of time changing and the location of space variation were predicate under these analysis windows. Thirdly, the carbon pools of the terrestrial ecosystem were divided into four parts, which contains the above ground pool, the below ground pool, the death pool and the soil pool. The density of carbon in each sub-pool was quantified and analyzed under the literature review. In the end, by programming the carbon storage module of the InVEST model, the carbon stocks of the Central Plains Economic Region from 2000 to 2010 were estimated and elucidated from time process and space pattern.In light of the analyses results, four main conclusions were obtained as follows: 1) based on the data source of LUCC and MODIS, the land use data with accuracy test values between 0.05km2 and 9.35km2 can be obtained to estimate the carbon storage; 2) most of the carbon in the research zone was reserved by farmland, while the wetland/water is the most powerful carbon absorption land form; 3) because of the large amount of organic matter, the soil reserved most of the carbon among the four carbon pools; 4) the carbon storage of the research zone increased year by year, and the increasing rate from 2005 to 2010 is much larger than that from 2000 to 2005. The increasing rate also showed the feature that higher in the west and lower in the east and the semicircular spatial distribution pattern from north to south.