Evidence for a polar ethane cloud on Titan

被引：135

作者：

Griffith, C. A. ^{[1
]}

Penteado, P.

Rannou, P.

Brown, R.

Boudon, V.

Baines, K. H.

Clark, R.

Drossart, P.

Buratti, B.

Nicholson, P.

McKay, C. P.

Coustenis, A.

Negrao, A.

Jaumann, R.

机构：

[1] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[2] Univ Versailles, Serv Aeron, F-91371 Verrieres Le Buisson, France

[3] Univ Bourgogne, Phys Lab, CNRS, UMR 5027, F-21078 Dijon, France

[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[5] US Geol Survey, Denver, CO 80225 USA

[6] Observ Paris, Meudon, France

[7] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA

[8] NASA, Ames Res Ctr, Mountain View, CA USA

[9] Observ Astron Lisboa, P-1349018 Lisbon, Portugal

[10] Deutsch Zentrum Luft & Raumfahrt, Inst Planetary Explorat, Oberpfaffenhofen, Germany

来源：

SCIENCE | 2006年 / 313卷 / 5793期

关键词：

D O I：

10.1126/science.1128245

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Spectra from Cassini's Visual and Infrared Mapping Spectrometer reveal the presence of a vast tropospheric cloud on Titan at latitudes 51 degrees to 68 degrees north and all longitudes observed (10 degrees to 190 degrees west). The derived characteristics indicate that this cloud is composed of ethane and forms as a result of stratospheric subsidence and the particularly cool conditions near the moon's north pole. Preferential condensation of ethane, perhaps as ice, at Titan's poles during the winters may partially explain the lack of liquid ethane oceans on Titan's surface at middle and lower latitudes.

引用

页码：1620 / 1622

页数：3

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