Retrospect and prospect of carbon circle mechanism and carbon storage calculation of grassland ecosystem in China

The carbon cycle and carbon storage becomes a hot spot in the filed of geoscience and global change in recent years, in which the grassland ecosystem as the unique type of ecological system is the most important and the most complicated part affected by man. This study reviewed the role of grassland in the global change, the relationships between the change of CO2 concentration and missing carbon sink and the grassland ecosystem, emphasized on the carbon circle process of the terrestrial ecosystem and grassland ecosystem and factors affecting the carbon circle. This study also summarized the carbon storage value and distribution pattern of grassland ecosystem in China, and the relationships between the source and sink in the process of carbon circle by current documents and papers, and then proposed the some current problems and a perspective of carbon circle, which would provided some useful information for carbon circle and carbon storage of the grassland ecosystem in China.