| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
|
|---|
| Outline of Final Research Achievements |
The purpose of this research is to estimate the amount and the kind of fossil fuels used on the continent upper wind of Japan. In order to do that, atmospheric observations of O2, CO2, and its variations △O2/CO2 were used. Atmospheric transport model, FLEXPART, was used to identify the sources of the air plumes observed at the observation point, Hateruma Island, Okinawa. By monitoring the air plume coming from the continent, it is possible to deduce the most likely fossil fuel mix being used at the emission sources and its amount. The model simulation well reproduced the observed concentration changes of CO2 and O2 separately. △O2/CO2, however, was not reproduced as well. It is suggested that the ratios of two chemical species are much more sensitive indicators of accuracy of atmospheric transport models and emission distributions. Estimation of emission distribution of methane (CH4) in East Asia was tried by combining the observation, FLEXPART and the inversion calculation.
|
