@article{3070424,
    title = "First observation in the south of titan's far-infrared 220 cm-1 cloud",
    author = "Jennings, D.E. and Anderson, C.M. and Samuelson, R.E. and Flasar, F.M. and Nixon, C.A. and Bjoraker, G.L. and Romani, P.N. and Achterberg, R.K. and Cottini, V. and Hesman, B.E. and Kunde, V.G. and Carlson, R.C. and De Kok, R. and Coustenis, A. and Vinatier, S. and Bampasidis, G. and Teanby, N.A. and Calcutt, S.B.",
    journal = "The Astrophysical Journal Letters",
    year = "2012",
    volume = "761",
    number = "1",
    issn = "2041-8205, 2041-8213",
    doi = "10.1088/2041-8205/761/1/L15",
    abstract = "An emission feature at 220 cm-1 which has been attributed to a cloud of condensed material in Titan's winter stratosphere has been seen for the first time in the south. This feature had previously been found only at high northern latitudes during northern winter and spring. The material emitting at 220 cm-1, as yet unidentified, may be volatiles associated with nitrile gases that accumulate in the absence of ultraviolet sunlight. Not detected as recently as 2012 February, the 220 cm-1 feature clearly appeared at the south pole in Cassini spectra recorded on 2012 July 24, indicating a rapid onset of the emission. This is the first indication of the winter buildup of condensation in the southern stratosphere that has been expected as the south pole moves deeper into shadow. In the north the 220 cm-1 feature continued to decrease in intensity with a half-life of 3 years. © 2012. The American Astronomical Society. All rights reserved."
}