Abstract
In order to encounter the climate change, reducing CO2 emission and increasing the CO2 accumulation and sequestration by plants are effective measures. Promoting urban greening is also effective, and determining the amount of CO2 accumulation is significant. Moreover, it is desirable that the estimation method is practical and applicable in reporting under Kyoto Protocol. The objective of this study is to estimate the annual CO2 accumulation of common greening tree species for sideways and city parks in Japan. We used the annual biomass growth rate for the estimation. Dry biomass weight was measured and stem analysis was conducted. Then, annual biomass growth rate was determined based on its allometry relationship with the d.b.h. Although the previous estimation study focused on the sequestration rate of 6 species for 20 years' period, we targeted the sequestration rate of same 5 species with 1 new species for 50 years' period. The obtained data and prior study's data were analyzed altogether, and the accumulation estimation equations were developed for each species. This study shows one of the benefits of urban greening, a role of the carbon sink. It is expected to contribute in promoting the further urban greening in Japan
