Carbon sequestration Carbon 9 Forestry 8 Ecosystems 7 carbon sequestration 7 China 5 Climate change 5 Climate change mitigation 4 Ecosystem services 4 Soils 4 climate change 4 ecosystem service 4 Climate models 3 Economic and social effects 3 Global warming 3 Organic carbon 3 biomass 3 carbon sink 3 soil carbon 3 spatiotemporal analysis 3 Biomass 2 Carbon dioxide 2 Carbon emission 2 Carbon storage 2 Crops 2 Emission control 2 Harvesting 2 Indicator indicator 2 Land use 2 Nitrogen fertilizers 2