The influence of radiative cooling and turbulence on the heat budget of the thermosphere

Analysis of thermospheric characteristic anomalies from 2021 Mw 7.5 Peru earthquake

“…It can be seen that the vector wind of the cells with data presents a clear tendency to diverge outward from the epicenter. The results are in agreement with the previous study that reported the outward diffusion of thermospheric vector wind after large earthquakes [18]. This provides obvious evidence for the seismic-related change of dynamic characteristic of the thermosphere.…”

“…The temperature exhibits relative stability in the altitude range of 90 km to 105 km, whereas a substantial enhancement in fluctuation is observed between 105 km and 110 km. This is related to the increasing intensity of turbulent movements [18]. It is evident that the positive anomalies of temperature display two vertical transfer chains that gradually uplift over time.…”

Excitation of vibrational emission bands in aurora and airglow

“…This has been confirmed by detailed calculations of temperatures, and density and IR-radiation intensities for the quiet thermosphere (46)(47)(48)(49)(50)(51)(52)(53)(54). It has been found that the important contributions to the thermospheric heat budget are provided by the 15-p.m band of CO, (for z 5 120 km) and the 5.3-p.m band of NO (for z 2 120 km).…”

“…Below 100 km, excitation by resonant IR radiation from the lower thermosphere is also important. Gordiets et al (46,(48)(49)(50), from analysis of the thennospheric heat budget, has found that the rate constant of collisional quenching of the 01'0 level of C 0 2 by atomic oxygen is . 161 kC02-0 -'.…”

“…This was first done by Gordiets et al (46) (see also refs. [47][48][49][50][51][52][53], and a year later by Kockarts (54).…”