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"...dramatic climate change on Titan is likely in its past, present and future..."

http://www.agu.org/pubs/crossref/2008/2007GL032118.shtml Abstract

Cassini RADAR observations now permit an initial assessment of the inventory of two classes, presumed to be organic, of Titan surface materials: polar lake liquids and equatorial dune sands. Several hundred lakes or seas have been observed, of which dozens are each estimated to contain more hydrocarbon liquid than the entire known oil and gas reserves on Earth. Dark dunes cover some 20% of Titan's surface, and comprise a volume of material several hundred times larger than Earth's coal reserves. Overall, however, the identified surface inventories (>3 × 104 km3 of liquid, and >2 × 105 km3 of dune sands) are small compared with estimated photochemical production on Titan over the age of the solar system. The sand volume is too large to be accounted for simply by erosion in observed river channels or ejecta from observed impact craters. The lakes are adequate in extent to buffer atmospheric methane against photolysis in the short term, but do not contain enough methane to sustain the atmosphere over geologic time. Unless frequent resupply from the interior buffers this greenhouse gas at exactly the right rate, dramatic climate change on Titan is likely in its past, present and future.

Received 2 October 2007; accepted 26 November 2007; published 29 January 2008.

GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L02206, doi:10.1029/2007GL032118, 2008

Titan's inventory of organic surface materials

Ralph D. Lorenz
Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA

Karl L. Mitchell
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Randolph L. Kirk
U.S. Geological Survey, Flagstaff, Arizona, USA

Alexander G. Hayes
Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA

Oded Aharonson
Geological and Planetary Sciences, California Institute of Technology, Pasadena, California, USA

Howard A. Zebker
Departments of Geophysics and Electrical Engineering, Stanford University, Stanford, California, USA

Phillipe Paillou
UMR 5804, Laboratorie d'Astrophysique de Bordeaux, Observatorie Aquitain des Sciences de l'Univers, Floirac, France

Jani Radebaugh
Department of Geological Sciences, Brigham Young University, Provo, Utah, USA

Jonathan I. Lunine
Lunar and Planetary Laboratory, University of Arizona, Tucson, Arizona, USA

Michael A. Janssen
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Stephen D. Wall
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Rosaly M. Lopes
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Bryan Stiles
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Steve Ostro
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Giuseppe Mitri
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA

Ellen R. Stofan
Proxemy Research, Rectortown, Virginia, USA

Keywords: Titan; surface; organics.

Index Terms: 6281 Planetary Sciences: Solar System Objects: Titan; 5470 Planetary Sciences: Solid Surface Planets: Surface materials and properties; 5464 Planetary Sciences: Solid Surface Planets: Remote sensing; 5405 Planetary Sciences: Solid Surface Planets: Atmospheres (0343, 1060).

46 posted on 02/13/2008 11:29:10 AM PST by Brian S. Fitzgerald ("We're going to drag that ship over the mountain.")
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To: Brian S. Fitzgerald

>>Several hundred lakes or seas have been observed, of which dozens are each estimated to contain more hydrocarbon liquid than the entire known oil and gas reserves on Earth. Dark dunes cover some 20% of Titan’s surface, and comprise a volume of material several hundred times larger than Earth’s coal reserves.<<

So, what if I were to go there and, like, you know, strike a match? Is there enough oxygen to get it going. It could be an interesting teraforming experiment.

Or is that too “plan 9 like”?


85 posted on 02/13/2008 12:09:02 PM PST by RobRoy
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