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Titan's latitudinal temperature distribution and seasonal cycle

Stevenson, David J. and Potter, Brian E. (1986) Titan's latitudinal temperature distribution and seasonal cycle. Geophysical Research Letters, 13 (2). pp. 93-96. ISSN 0094-8276. doi:10.1029/GL013i002p00093.

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Voyager IRIS brightness temperature measurements of Titan at a wavelength of 530 cm^(−1) are crudely indicative of ground or lower tropospheric temperatures and indicate 93 K for the equator and 91 K for both northern and southern high latitudes. The symmetry between north and south is unexpected for the time of Voyager encounter (Northern Titan spring). We show that this near-symmetry can arise naturally in a model where the poles are "pinned" year-round at the dew point of CH_4-N_2 lakes or, more probably, a CH_4-N_2 rich surface layer on a deep ethane-rich ocean. For a polar temperature of 91 K, the model implies that the atmosphere contains somewhat less than 8% mole fraction of CH_4.

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Stevenson, David J.0000-0001-9432-7159
Additional Information:© 1986 American Geophysical Union. Received August 29, 1985; revised December 2, 1985; accepted December 2, 1985. This work is supported by NASA planetary geophysics grant NAGW-185. Brian Potter performed this work at Caltech while participating in NASA's Planetary Geology Undergraduate Research Program and acknowledges their financial support. We thank an anonymous reviewer for helpful comments and corrections. Contribution number 4265 from the Division of Geological and Planetary Sciences, Caltech, Pasadena, CA 91125.
Group:UNSPECIFIED, Division of Geological and Planetary Sciences
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NASA Undergraduate Student Research ProgramUNSPECIFIED
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Caltech Division of Geological and Planetary Sciences4265
Issue or Number:2
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Official Citation:Titan's latitudinal temperature distribution and seasonal cycle (pages 93–96) David J. Stevenson and Brian E. Potter Article first published online: 7 DEC 2012 | DOI: 10.1029/GL013i002p00093
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44261
Deposited By: Ruth Sustaita
Deposited On:12 Mar 2014 14:48
Last Modified:10 Nov 2021 16:49

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