Computer Science
Scientific paper
Oct 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999p%26ss...47.1341l&link_type=abstract
Planetary and Space Science, Volume 47, Issue 10-11, p. 1341-1346.
Computer Science
1
Scientific paper
The present study investigates the role of high altitude monomer particles in the energy balance of Titan's upper atmosphere above an assumed low and high aggregate formation altitude of 385 km and 535 km. A `single particle approach' was applied, where the starting point is the energy balance of an individual aerosol. In our analysis 0.01-0.06 μm radius aerosol particles were chosen for the proposed monomer formation regions. These particles absorb solar radiation, emit in the infrared, and are energetically linked to the surrounding gas by thermal conduction. To compute the monomer particle heating effect, the aerosols are assumed to radiate directly to space. We found that high altitude monomers may affect the profile of Titan's thermosphere from 2 to 20 K depending on the formation altitude of fluffy non-spherical aggregates, the monomer size and distribution. The actual Titan temperature profile in this altitude range including all heating effects will be measured by the HASI instrument during the descent of the Huygens probe.
Lammer Helmut
Stumptner W.
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