ent research topic in the studies about global environmental change. With the joint promotion of the “International Geosphere-Biosphere Programme" (IGBP) and the "Global Environmental Change humanities program", land Use/Land Cover Change (LUCC) has become one of the core areas of global environmental change research. Especially with the progress in studies about global change and the carbon cycle, the relationship between the land use change and the carbon cycle is suggested to be more and more closed.
Shanghai is one of the most of economically developed cities. In recent years, with the rapid development of Shanghai's economy, rapid industrialization and urbanization has made shanghai become one of the areas with the most significant changes in land use patterns. Dramatic changes in land use patterns will inevitably make important impacts the carbon fixation of the regional soils. Therefore, in this context, the dynamic changes of soil carbon fixation should be studied combined with land use change. Up to date, some research has been conducted about the land use change in Shanghai (Han, et al., 2009).
5.2 Methodology
5.2.1 Data collection
For almost three decades, China has been undergoing significant transition from a planned economy to a market economy. Fast-paced economic growth and urbanization, interacting with market-oriented reforms in land resources allocation, have caused profound spatial restructuring of Chinese cities (Xu, et al., 2007, pp.19). In 1990s, Shanghai experienced the fastest-growing urbanization and dramatic changes in land use. The time span of the land use data is 1980-2010. The data contains the interpretation data of aerial remote sensing in 1980, 1985, 1990, 1995, 2000, 2005, 2010
5.2.2 Data processing
5.2.2.1 Land use classification system
According to the research purpose of this study, urban green fields, farmland, woodland, garden plot and tidal-flat areas, etc. are the most important component of Shanghai's soil carbon pool. Therefore, the land use classification system in this paper focuses on the information extraction of these types of land use. At the same time, in order to analyze the effects of the distribution and change of other land use types such as industrial land, residential land use, land for roads on the Shanghai's soil carbon pool, thus the information of these land use types will also be classified and extracted. Combined with the characteristics of remote sensing survey, the land use classification system was developed as following Table 5-1
No. of classification Name Introduction
1 Industrial warehouse Production workshop, warehouse, yard and ancillary facilities of Mining and warehousing enterprises the dedicated railway land, docks and roads and other land
2 Traffic land Including roads, railways, airports, ports and lands for external internal transport, and squares, parking lots and other lands
3 Urban residential land Various types of land and (except of green land) in the urban and rural residential area, and land for utilities including buildings and other facilities
4 Urban green land Including various of public green land, parks, road greening, the affiliated green space of landscape, the affiliated green space of landscape of institutions, residential district green area, green land for production and industrial green land
5 Othe
