Presentation Information
[PPS04-P29]New Physical Model of the non-LTE 15-µm Radiative Cooling of the Middle and Upper Atmospheres of Terrestrial Planets
Ladislav Rezac1, Alexander A. Kutepov2, Artem Feofilov3, *Konstantinos S. Kalogerakis4 (1.Max Planck Institute for Solar System Research, Göttingen, Germany, 2.The Catholic University of America, Washington D.C., USA, 3.Ecole Polytechnique, Palaiseau, France, 4.SRI International, Menlo Park, California, USA)
Keywords:
Terrestrial Planets,Radiative Cooling,15-µm Thermal Emission,O + CO2 Collisions
It is generally accepted that the 15-µm infrared emission of carbon dioxide is the main cooling mechanism of the middle and upper atmospheres (MUAs) of Earth, Venus, and Mars. This was postulated 56 years ago by Paul Crutzen, who recognized that the collisional excitation of carbon dioxide by oxygen atoms is the dominant process driving these emissions. These emissions are now routinely observed from satellite platforms to obtain temperature profiles, energy budget, and thermal balance of the upper atmosphere. In this report, we present the analysis of the non-LTE models of the 15-µm emission formation and the results of a CO2 15-µm cooling calculation for MUAs of terrestrial planets obtained using our new non-LTE physical model of this emission formation. We will also summarize the implications for the future observations and modeling of the MUAs of Mars and Venus.
Research supported by the US National Science Foundation under grants AGS-2312191/92 and AGS-2125760, and by NASA under grant 80NSSC21K0664.
Research supported by the US National Science Foundation under grants AGS-2312191/92 and AGS-2125760, and by NASA under grant 80NSSC21K0664.