| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
We used a simple two-layer atmosphere model constrained by the radiative equilibrium to demonstrate the existence of a threshold value in longwave (LW) emissivity that determines whether increase in LW emissivity, i.e., increase in LW absorptivity, induced by increase in well-mixed greenhouse gasses (WM-GHGs), leads to warming or cooling of the atmosphere, and to investigate the carbon dioxide concentration value corresponding to the threshold value in LW emissivity. We found that the critical emissivity of the stratospheric layer which is required for entering the stratospheric warming stage is 0.258. The threshold value of the carbon dioxide concentration corresponding to the threshold value in LW is also investigated.
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