Details

Autor(en) / Beteiligte

• Mayr, H.G.
• Harris, I.
• Stevens-Rayburn, D.R.
• Niemann, H.B.
• Taylor, H.A.
• Hartle, R.E.

Titel

On the diurnal variations in the temperature and composition: a three-dimensional model with superrotation

Ist Teil von

• Advances in space research, 1985, Vol.5 (9), p.109-112

Ort / Verlag

Legacy CDMS: Elsevier Ltd

Erscheinungsjahr

1985

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Based on a simplified theoretical interpretation of the composition measurements with the ONMS and OIMS experiments on Pioneer Venus, the conclusion was drawn that the rotation rate of the thermosphere should be close (within a factor of two) to that of the lower atmosphere. A more realistic three-dimensional model of the thermosphere dynamics is now being developed, considering non-linear processes, higher order modes and collisional momentum exchange between the major species CO 2, CO and O, which describes the diurnal variations in temperature and composition (Niemann et al., JGR , 1980). The computed horizontal winds are about 300 m/sec near the terminators and poles. Results are also presented from a two-dimensional (quasi-axisymmetric) spectral model which describes the four day superrotation in the lower atmosphere of Venus.