[Carbon output through urban domestic garbage in Haikou]

Carbon output through urban domestic garbage is one part of carbon cycle in urban ecosystem which is related to some environmental pollution. Researches on carbon output through urban domestic garbage is the foundational work on carbon cycle in urban ecosystem, but also can help to analyze the influences of residents' consumption on environment. Based on data got through sampling and collecting, the status and trend of carbon output through domestic garbage in Haikou was analyzed. The results showed that, the total carbon output through 26.92 x 104 t of domestic garbage is 10.51 x 104 t and the carbon output per capita everyday is 0.326 kg/(cap. d)(-1) in 2001. About 31% of the total carbon will be transferred into methane, carbon dioxide and organic matter in extravasate. About 69% of the total carbon will be sequestrated in landfill. Because 33% of the sequestrated carbon originate from atmosphere, urban domestic garbage may be a carbon sink. From 1991 to 1999, the carbon output through Haikou's domestic garbage is annually increasing by 9.55%, and the output of sequestrated carbon is annually increasing remarkably by 13.23%. The increase of carbon output is significantly correlated with the increase of expenditure per capita and population, which shows expenditure per capita and population have some effect on carbon output.