Physics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.7101k&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, June 1, 1986, p. 7101-7104. Research supported by the Indian Space Re
Physics
2
Atmospheric Heating, Io, Ionic Collisions, Jupiter Atmosphere, Magnetohydrodynamic Waves, Thermosphere, Energy Dissipation, Planetary Ionospheres
Scientific paper
Heating rates due to collisional dissipation of Io-generated Alfven waves in the Jovian thermosphere are calculated. It is found that the frictional dissipation of the low period waves penetrating the Jovian ionosphere can result in considerable heating near the foot of the Io flux tube. It is shown that the heating from Alfven waves will be important on a local scale rather than globally; the total amount of power available from Alfven waves turns out to be 1.4 x 10 to the 10th W, whereas solar EUV heating can supply about 7 x 10 to the 11th W over the sunlit hemisphere and the auroral heat source can give as much as 8.5 x 10 to the 12th W. It is noted however, that localized heating due to Alfven waves may cause ionospheric irregularities as well as wind field alterations in the upper ionosphere. In effect, heating from Alfven waves is expected to play an important role in the dynamics of the Jovian high-latitude ionosphere.
Kar Jayanta
Mahajan K. K.
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