| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2013: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2011: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Outline of Final Research Achievements |
We have studied impacts of the increase of concentration rate of the greenhouse gasses (such as CO2) on the thermosphere-ionosphere system by performing a series of numerical simulations. A numerical model used in this study was an atmosphere-ionosphere coupled model (GAIA), which contains the region from the ground surface to the upper thermosphere/ionosphere. Our simulation results indicated that not only the increases of CO2 concentration rate but also day-to-day and inter-annual variations of the atmospheric waves from the lower atmosphere affect the thermosphere-ionosphere system. Therefore, some additional numerical experiments were conducted to estimate effects of the atmospheric waves on the thermospheric temperature. By comparing these simulation results, we estimated the global cooling in the thermosphere caused by the increase of CO2 concentration rate.
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