Abstract: Carbon inventory certified methods of carbon sequestration rate and potential in terrestrial ecosystem at region scale and their uncertainty analysis are the scientific foundational work of taking practices to mitigating the global warming potential. A large number of studies have been carried out on the measuring methods of the terrestrial ecosystem carbon sink and the carbon sequestrating potential ,and the national greenhouse gas inventory methods, CDM (Clean Development Mechanism projects) afforestation and reforestation project methods, carbon inventory method in land-use and land-cover change and some other methods were proposed. National greenhouse gas inventory was applicable to state-wide measurement of carbon sequestration, and was not suitable for regional carbon inventory. CDM afforestation and reforestation project focused on the carbon sequestration potential of forest management, and did not take the practices of increasing carbon sinks carried on other ecosystems into account. To date carbon sequestration measurement for forest, grassland, farmland and other regional- scale of ecosystems do not have a uniform and standardized methodology yet. In this paper, we first introduced national greenhouse gas inventory methods, CDM afforestation and reforestation project methods, carbon inventory method in land-use and land-cover change and analysis their uncertainty in detail. Then we proposed a carbon inventory method applicable to farmland, grassland, forests and other terrestrial ecosystems, aiming to provide scientific basis for establishing the methodology for measuring, reporting, and verifying the carbon sequestration rate and potential in regional terrestrial ecosystems.

Key words: carbon inventory methods, carbon sequestration rate and potential, regional scale, terrestrial ecosystem, uncertainty analysis