Infrared Fourier-spectrometer experiment from Venera-15

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Infrared Fourier-spectrometer experiment from Venera-15

Schäfer, K. / Dubois, R. / Haus, R. / Dethloff, K. / Goering, H. / Oertel, D. / Becker-Ross, H. / Stadthaus, W. / Spänkuch, D. / Moroz, V.I. / ... [mehr]

Abstract

Abstract Interpretation of Fourier-spectrometer experiment gave new knowledge about structure and variability of Venus atmosphere in the altitude range from 60 to 100 km during the time interval from 12 Oct to 14 Dec 1983. The very complex information content of IR-spectra made it possible for the first time to retrieve simultaneously temperature profile, optical cloud properties with hints to composition of upper cloud layer and cloud top altitude, SO2 and H2O mixing ratios, and search for unknown minor constituents. Basing on these results the whole radiation balance considering multiple-scattering by aerosol and exact gas transmittances (line by line) has been modelled. The gross-structure of meridional circulation (Hadley-cell) was estimated with these altitude and latitude dependent cooling and heating rates. From the retrieved temperature field the cyclostrophic wind with a jet of more than 100 m/s near 70 km altitude and 55° N has been computed. A linear barotropic model was developed to investigate these zonal wind profiles at 70 km altitude on instability of planetary waves. Wavenumber 2 has the greatest instability rate and a phase period in the range of 4 days. The barotropically most unstable disturbances have characteristics which are qualitatively in accordance with observed waves.

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Dokumentinformationen

Titel :

Infrared Fourier-spectrometer experiment from Venera-15

Beteiligte:

Schäfer, K. (Autor:in) / Dubois, R. (Autor:in) / Haus, R. (Autor:in) / Dethloff, K. (Autor:in) / Goering, H. (Autor:in) / Oertel, D. (Autor:in) / Becker-Ross, H. (Autor:in) / Stadthaus, W. (Autor:in) / Spänkuch, D. (Autor:in) / Moroz, V.I. (Autor:in)

Erschienen in:

Advances in Space Research ; 10 , 5 ; 57-66

Erscheinungsdatum :

1989-01-01

Format / Umfang :

10 pages

ISSN :

0273-1177

DOI :

https://doi.org/10.1016/0273-1177(90)90166-W

Medientyp :

Aufsatz (Zeitschrift)