Abstract:In this study, 472 green surface soil samples (0-20 cm) were collected in Shanghai, the contents and densities of soil organic carbon (SOC) were analyzed, and then the storage of organic carbon of green surface soil was estimated in order to provide data support for predicting the changes of carbon pool in Shanghai in the coming years. The results showed that the spatial variability of SOC in green surface soil was large, and the content and density of SOC were higher in the west region but lower in the east region, and gradually increased from the center to surrounding regions. The contents of SOC were in the order of park green space > public green space > road green space, while the densities of SOC were in the order of public green space > park green space > road green space. There were significant differences in SOC contents and densities among different green spaces, and among them, SOC contents and densities were significantly different in different green spaces within urban area (P<0.05), but no significant differences in suburbs (P>0.05). In 2015, the storage of organic carbon in surface soil of green space in Shanghai was about 4.26 million tons, and is estimated to be 15.3 million tons by 2035.