Seasonal Changes in Titan's Surface Temperatures

Details Seasonal Changes in Titan's Surface Temperatures Seasonal Changes in Titan's Surface Temperatures

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ttt..work...45j&link_type=abstract

Through Time; A Workshop On Titan's Past, Present and Future, NASA Goddard Space Flight Center, April 6th - 8th, 2010. Edited b

Computer Science

Scientific paper

The Composite Infrared Spectrometer (CIRS) (Flasar, 2004) on Cassini measures brightness temperatures at the surface of Titan near 19 microns wavelength where the atmospheric opacity is low. During the Cassini mission CIRS has collected a large dataset covering all latitudes with a range of viewing geometries. When latitude maps from the recent northern spring equinox are compared with maps from earlier in the mission (Jennings, 2009) they show changes in temperature distribution that are similar to predictions of seasonal variation at the surface (Tokano, 2005). During late northern winter Titan's surface temperatures were about 1 K colder at the north pole than at the south pole. In the period around equinox the north-south distribution was more symmetric and matched the latitude dependence observed by Voyager 1, also near northern spring equinox (Flasar, 1981; Courtin, 2002). Seasonal changes in surface temperature have implications for evaporation of volatiles and may help determine surface composition and structure.

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