Study on Effects of Organic Carbon Emission of Land Use Change in Shenzhen City, China

Abstract

The effects of terrestrial carbon cycle caused by Land use change on are obvious. Urbanization is an important reason of land use change. Based on the soil and plant data that field sampled, five remote sensing data of 1979, 1989, 1995, 2000 and 2003, the effects on ecosystem organic carbon pool from1979 to 2003 caused by land use change in Shenzhen city are analyzed. The land use changes are mainly occurred between the following 8 land types, farmland, wood land, grass land and construction land. The results show that form 1979 to 2003 carbon emissions caused by land use change in Shenzhen City totally reduced by 337.24 × 104Mg C (1Mg C = 1 × 106g C). The average annual carbon emissions arrive up to 24.09 × 104Mg C. Among them, the emissions caused by the reductions of farmland and forest area are respectively 252.26 × 104Mg C and 111.73 × 104Mg C. The organic carbon increment caused by garden land increase is 47.37 × 104Mg C. The results show that Urbanization process totally is a carbon sink process. The study is valuable for assessing the relations between carbon effects and land development and ecological restoration planning in the process of rapid urbanization.

Co-Integration Theory-Based Study on Environmental Kuznets Curve of Land Use Change Carbon Emission in Shenzhen

“…The carbon emission of land use (expressed as LC).It is mainly estimated on the basis of vegetation and soil; among of them, the vegetation carbon stock data is based on the Cat.-II survey data on forest resources of Shenzhen City, estimating with the volume source-biomass method; the soil carbon stock is estimated on the basis of the actual measured data on organic carbon density of 0 -30 cm soil, in combination with MSS image in 1979, TM images in 1989, 1995, 2000 and 2003, the SPOT image in 2003, and HJ-1 imagery interpretation results in 2010 (Figure 1), the carbon emissions of urban construction land are estimated for years of 1979,1989,1995,2003,2010 respectively [9], and the carbon emissions data of the rest years is obtained from interpolation through the piecewise linear interpolation.…”

Study on Ecological Carbon Sink Regionalization of Land Use in Shenzhen City

“…Part of soil data is come from the national interpolation data of the fourth National Soil Survey with spatial resolution of 5 x 5 km. Soil carbon content data is from the measured soil data of Shenzhen [4] The land use carbon emissions data is based on the land use data interpreted from multi-period remote sensing images and ecosystem carbon storage data; the detail methods and results could reference the paper published by Liu [5].…”