Radiative balance in the mesosphere of Venus from the Venera-15 infrared spectrometer results

Details Radiative balance in the mesosphere of Venus from the Venera-15 infrared spectrometer results Radiative balance in the mesosphere of Venus from the Venera-15 infrared spectrometer results

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15...73t&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 15, no. 4, p. (4)73-(4)77

Astronomy and Astrophysics

Astronomy

7

Computerized Simulation, Infrared Astronomy, Mesosphere, Radiative Transfer, Venus (Planet), Venus Atmosphere, Aerosols, Carbon Dioxide, Fourier Transformation, Infrared Spectrometers, Sulfuric Acid, Ultraviolet Absorption, Venera Satellites

Scientific paper

The results of the VENERA-15 Fourier Transform Infrared Spectrometer (FTIR) experiment provided a unique change to retrieve simultaneously the thermal and aerosol structures of the mesosphere of Venus. These data were used as a basis for the numerical modelling of the radiative transfer. The cooling and heating rate altitude profiles in the range from 90 down to 55 kilometers are presented for different latitudes from 20 deg N to 87 deg N. The main components that influence the propagation of solar and thermal radiation at these altitudes are carbon dioxide, H2SO4 aerosols and the ultraviolet absorbers. The analysis of the cooling, heating and net cooling-heating latitude-altitude field leads to the conclusion that the mesosphere of Venus is heated at low latitudes (phi less than 40 deg) at the cloud tops (58-65 km) mainly due to the presence of the UV absorbers. The strong cooling (10-15 K/Day) prevails in the high latitude (phi greater than 60 deg) mesosphere with a sharp maximum at the dense cloud tops in the 'cold collar' region where the net cooling could reach 25 K/day.

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