Internal gravity waves in Titan's atmosphere observed by Voyager radio occultation

Details Internal gravity waves in Titan's atmosphere observed by Voyager radio occultation Internal gravity waves in Titan's atmosphere observed by Voyager radio occultation

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...54..337h&link_type=abstract

(Saturn Conference, Tucson, AZ, May 11-15, 1982) Icarus (ISSN 0019-1035), vol. 54, May 1983, p. 337-352.

Physics

40

Gravity Waves, Internal Waves, Radio Occultation, Satellite Atmospheres, Titan, Voyager 1 Spacecraft, Atmospheric Stratification, Refractivity, Scintillation, Wave Propagation, Saturn, Satellites, Titan, Gravity Waves, Gravity Effects, Observations, Voyager Missions, Radio Observations, Occultations

Scientific paper

The radio scintillations caused by scattering from small-scale irregularities in Titan's neutral atmosphere during a radio occultation of Voyager 1 by Titan are investigated. Intensity and frequency fluctuations occurred on time scales from about 0.1 to 1.0 sec at 3.6 and 13 cm wavelengths whenever the radio path passed within 90 km of the surface, indicating the presence of variations in refractivity on length scales from a few hundred meters to a few kilometers. Above 25 km, the altitude profile of intensity scintillations closely agrees with the predictions of a simple theory based on the characteristics of internal gravity waves propagating with little or no attenuation through the vertical stratification in Titan's atmosphere. These observations support a hypothesis of stratospheric gravity waves, possibly driven by a cloud-free convective region in the lowest few kilometers of the stratosphere.

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