Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 29, Issue 23, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2002GL016100
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[1] Using a global time-dependent general circulation model, we calculate the distribution of constituents in Titan's thermosphere resulting from transport caused by winds and molecular and eddy diffusion. Our simulations reveal that thermospheric winds effectively mix constituents in Titan's upper atmosphere. Consequently, the large eddy coefficients inferred from Voyager UVS observations may be a result of vigorous thermospheric circulation on Titan. Thermospheric winds also cause large diurnal variations in composition, with equatorial CH(4) mole fractions near 1400 km ranging from similar to15% in the late afternoon to similar to58% in the early morning at equinox.
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