Analysis of seasonal variability of methane over global land area
In this study, we determine the global emission concentration of methane using the scanning imaging absorption spectrometer for atmospheric chartography data. We analyzed land and sea area to investigate the 9-year changes in methane concentrations from 2003 to 2011. Moreover, by subtracting the concentration of methane from land and sea, we can found the methane emission concentration of land. As a result, it is cleared that a big amount of CH4 emission concentration was found not only in the northern Hemisphere paddy fields but also in the southern Hemisphere broadleaf evergreen areas (central Africa and south America). We also found that the global land CH4 growth rate is 35ppb/year during 9years.
emission concentration ch4 greenhouse gases scimachy ch4 sources