The role of nitric oxide on the zonally averaged structure of the thermosphere - Solstice conditions for solar cycle minimum

Details The role of nitric oxide on the zonally averaged structure of the thermosphere - Solstice conditions for solar cycle minimum The role of nitric oxide on the zonally averaged structure of the thermosphere - Solstice conditions for solar cycle minimum

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34..131g&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, Feb. 1986, p. 131-144. FNRS-supported research.

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14

Atmospheric Circulation, Atmospheric Composition, Atmospheric Models, Nitric Oxide, Solar Cycles, Thermosphere, Aerothermodynamics, Atmospheric Temperature, Solstices

Scientific paper

The effects of nitric oxide 5.3-micron cooling on thermospheric dynamics and composition are studied using a zonally averaged chemical-dynamical model of the thermosphere. The steady-state perturbation temperature, wind components, and O, O2, and N2 concentrations are calculated. It is observed that the 5.3-micron cooling reduces the latitudinal temperature gradient between the summer and winter hemisphere; in the upper thermosphere the NO 5.3-micron cooling decreases the summer-to-winter pole temperature by about 45 K. The summer-to-winter meridional circulation is weakened and the zonally averaged meridional wind velocity is reduced by 8 m/s. It is detected that the changes in the circulation and latitudinal temperature gradient produces a 40 percent decrease in the O2 and a 15 percent increase in O concentrations in the upper thermosphere at high summer latitudes. The data reveal that the influence of NO 5.3-micron cooling on the dynamic structure of the thermosphere is extremely significant during solar maximum conditions and geomagnetic storms when the NO densities and neutral temperature increase.

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