JpGU-AGU Joint Meeting 2017

Presentation information

[EE] Poster

P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM11] [EE] Mesosphere-Thermosphere-Ionosphere Coupling in the Earth's Atmosphere

Wed. May 24, 2017 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL7)

[PEM11-P17] Thermosphere response to doubling CO2: simulation results with GAIA model

*Yusuke Nakamoto1, Huixin Liu1, Yasunobu Miyoshi1 (1.Department of Earth and Planetary Sciences, Graduate School of Science, Kyushu University)

Keywords:thermosphere, CO2, vertical coupling

Using the whole atmosphere model GAIA, we investigate the influence of doubling CO2 on the thermosphere. Our results reveal consist cooling in the upper thermosphere as reported in previous work. Furthermore, we find that the cooling effect has distinct spatial and seasonal variation. First, it is stronger in polar regions than at lower latitudes. Second, it is stronger in local summer than in local winter. Third, it is stronger at night than at day. We investigate the mechanism for these variations by examining changes in the global circulation and composition.