Universität zu Köln

Jennings, D. E., Cottini, V., Nixon, C. A., Achterberg, R. K., Flasar, F. M., Kunde, V. G., Romani, P. N., Samuelson, R. E., Mamoutkine, A., Gorius, N. J. P., Coustenis, A. and Tokano, T. (2016). SURFACE TEMPERATURES ON TITAN DURING NORTHERN WINTER AND SPRING. Astrophys. J. Lett., 816 (1). BRISTOL: IOP PUBLISHING LTD. ISSN 2041-8213

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Abstract

Meridional brightness temperatures were measured on the surface of Titan during the 2004-2014 portion of the Cassini mission by the Composite Infrared Spectrometer. Temperatures mapped from pole to pole during five two-year periods show a marked seasonal dependence. The surface temperature near the south pole over this time decreased by 2 K from 91.7 +/- 0.3 to 89.7 +/- 0.5 K while at the north pole the temperature increased by 1 K from 90.7 +/- 0.5 to 91.5 +/- 0.2 K. The latitude of maximum temperature moved from 19 S to 16 N, tracking the subsolar latitude. As the latitude changed, the maximum temperature remained constant at 93.65 +/- 0.15 K. In 2010 our temperatures repeated the north-south symmetry seen by Voyager one Titan year earlier in 1980. Early in the mission, temperatures at all latitudes had agreed with GCM predictions, but by 2014 temperatures in the north were lower than modeled by 1 K. The temperature rise in the north may be delayed by cooling of sea surfaces and moist ground brought on by seasonal methane precipitation and evaporation.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Jennings, D. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cottini, V. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nixon, C. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Achterberg, R. K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Flasar, F. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kunde, V. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Romani, P. N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Samuelson, R. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mamoutkine, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gorius, N. J. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Coustenis, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tokano, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-291325
DOI:	10.3847/2041-8205/816/1/L17
Journal or Publication Title:	Astrophys. J. Lett.
Volume:	816
Number:	1
Date:	2016
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	2041-8213
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language COMPOSITE INFRARED SPECTROMETER; CASSINI RADIO OCCULTATIONS; ATMOSPHERE; CIRCULATION; SPECTRA; MIDDLE; STRATOSPHERE; TROPOSPHERE; DYNAMICS Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/29132