부산대학교 도서관

A history of biomass burning An EPICA ice core drilled in Dronning Maud Land in Antarctica has been used to derive a record of carbon isotopic ratios in methane over the entire last glacial–interglacial transition. The data show that the carbon in atmospheric methane is isotopically much heavier in cold climate periods. Biomass burning is the only natural source of methane strongly enriched in carbon-13, and the combination of δ13CH4 data with earlier results and box modelling suggest that methane emissions due to biomass burning remained approximately constant throughout the glacial termination, that the atmospheric lifetime of methane is reduced during cold climate periods and that wetlands are an important source of methane during warming events.