A Model study of the atmospheric heating rates due to O3, H2O and O2

Abstract

The height distribution of solar heating rate due to ozone, water vapour and oxygen molecule from ground to 100 km altitude has been examined in this study. The cooling rate due to infrared emission of CO2, O3 and water vapour molecules has also been studied for middle atmospheric region. The heating and cooling rates have been calculated for midlatitude and equinox condition. The diurnal variation of net radiative temperature change in tropospheric and stratospheric region causes I generation of waves, which propagate in the mesospheric region and affects the climatology of the upper atmosphere. The heating rate due to water vapour is found to be important in the troposphere, ozone heating is Significant in the stratosphere, and oxygen heating rate is found to be important in the mesospheric region. The maximum ozone heating rate in the stratospheric region is found to be ~ 15 K/day. The cooling rate is due to CO2 is very significant in the stratospheric region and its found to be about -12 K/day. The net radiative temperature change due to heating and cooling has been obtained to be similar to the atmospheric temperature profile.