Analyzing land-cover change and corresponding impacts on carbon budget in a fast developing sub-tropical region by integrating MODIS and Landsat TM/ETM+ images |
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| Institution: | 1. School of Geography and Planning, Sun Yat-sen University, Guangzhou, China;2. Guangdong Key Laboratory for Urbanization and Geo-simulation, Sun Yat-sen University, Guangzhou, China;3. School of Marine Sciences, Sun Yat-sen University, Guangzhou, China;1. School of Geography and Planning, Sun Yat-sen University, Guangzhou, China;2. Guangdong Key Laboratory for Urbanization and Geo-simulation, Sun Yat-sen University, Guangzhou, China;3. College of Natural Resources and Environment, South China Agricultural University, Guangzhou, China;1. School of Geography and Planning, Guangdong Key Laboratory for Urbanization and Geo-simulation, Sun Yat-sen University, Guangzhou, 510275, Guangdong province, China;2. School of Geographical Sciences of Guangzhou University, Guangzhou University, Guangzhou, China;3. College of Resources and Environmental Sciences, Hunan Normal University, China;4. Guangdong Guodi Planning Science Technology Co., ltd, China;1. School of Agricultural, Forest, Food and Environmental Sciences, University of Basilicata, Potenza, Italy;2. Council for Agricultural Research and Economics (CREA), Rome, Italy;1. State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Xinjie Kouwai Street, Beijing 100875, PR China;2. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Chaoyang District, Beijing 100101, PR China;3. School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, Guangdong, PR China;1. Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou, 510275, China;2. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China;3. School of Geosciences and Info-Physics, Central South University, Changsha, 410083, China |
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| Abstract: | Land-cover change has significant impacts on regional carbon dynamics. Understanding the carbon consequences of land-cover change is necessary for decision makers to address the issues of carbon reduction and climate change mitigation. Optical remote sensing images have been widely used for detecting regional land-cover change. However, it is difficult to acquire desirable images for regions that are frequently affected by cloudy and rainy weather. In this study, we proposed an approach to deal with this problem by integrating moderate-resolution imaging spectroradiometer (MODIS) and Landsat images based on the mixed-label analysis (MLA) model. We tested this model in Guangdong Province, a fast developing sub-tropical region in China, to derive the provincial land-cover data for the analysis of land-cover change between 2000 and 2009 and its impacts on regional carbon dynamics. Results show that forest land decreased by 3.03%, while built-up area rapidly expanded by 73.01% from 2000 to 2009. The regional vegetation carbon sink declined by 2.6%, whereas the regional carbon emissions increased by more than 100% due to the fast urbanization and economic development. The regional vegetation carbon sink can only offset 4.1% of total carbon emissions in 2009, far below the national level (about 7.0–7.7%) at the same period. Future efforts to improve the regional carbon budget should focus more on the control of land development and the advance of energy efficiency. |
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| Keywords: | Mixed-label analysis Land-cover change Carbon budget MODIS Landsat |
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