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Dark and Bright Albedo Changes in the Wake of a Titan Rainstorm

Barnes, Jason W. and Buratti, B. J. and Turtle, E. P. and Bow, J. and Dalba, P. A. and Perry, J. and Rodriguez, S. and LeMouelic, S. and Baines, K. H. and Sotin, C. and Lorenz, R. D. and Malaska, M. J. and McCord, T. B. and Clark, R. N. and Jaumann, R. and Hayne, P. O. and Nicholson, P. D. and Soderblom, J. M. and Soderblom, L. A. (2012) Dark and Bright Albedo Changes in the Wake of a Titan Rainstorm. 44th annual meeting of the Division for Planetary Sciences of the American Astronomical Society, 14.-19.10.12, Reno, Nevada,USA.

Full text not available from this repository.

Abstract

Turtle et al. (2011) previously announced large-scale surface changes in Titan's tropics following a 2010 September cloudburst event. Those changes were areas that had darkened, and the darkening was attributed to surface wetting by rain. Here we will discuss the results of continued monitoring of the darkened areas by Cassini VIMS and ISS. These new observations show that instead of reverting to their previous state, the rain-darkened areas instead brightened beyond their original albedos starting a few months after the cloudburst event. The brightening was unexpected, and spectra show that it occurs in each of Titan's atmospheric wavelength windows. The brightened spectra show some similarity to he heretofore unique signature of Xanadu. The areas slowly revert to their original spectra over a period of a year. The two hypotheses that we have not eliminated involve (1) volatile frosts resulting from evaporative cooling of rain-derived surface methane that later sublime, (2) deposition of a thin surface layer of very-fine-grained particles (similar to terrestrial playa lakes) that degrade due to aeolean erosion. Future calculations and observations will serve to constrain the mechanism that drives the brightening.

Item URL in elib:https://elib.dlr.de/80286/
Document Type:Conference or Workshop Item (Paper)
Title:Dark and Bright Albedo Changes in the Wake of a Titan Rainstorm
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Barnes, Jason W.University of IdahoUNSPECIFIED
Buratti, B. J.JPLUNSPECIFIED
Turtle, E. P.JHU/APLUNSPECIFIED
Bow, J.University of IdahoUNSPECIFIED
Dalba, P. A.JPL/UCBerkeleyUNSPECIFIED
Perry, J.University of ArizonaUNSPECIFIED
Rodriguez, S.Laboratoire AIM, FranceUNSPECIFIED
LeMouelic, S. University of Nantes, FranceUNSPECIFIED
Baines, K. H. University of WisconsinUNSPECIFIED
Sotin, C.JPLUNSPECIFIED
Lorenz, R. D.JHU/APLUNSPECIFIED
Malaska, M. J.JPLUNSPECIFIED
McCord, T. B.Bear Fight InstituteUNSPECIFIED
Clark, R. N.USGSUNSPECIFIED
Jaumann, R. ralf.jaumann (at) dlr.deUNSPECIFIED
Hayne, P. O.CaltechUNSPECIFIED
Nicholson, P. D.CornellUNSPECIFIED
Soderblom, J. M.MITUNSPECIFIED
Soderblom, L. A. USGSUNSPECIFIED
Date:October 2012
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Titan, Cassini, VIMS, Albedo, ISS
Event Title:44th annual meeting of the Division for Planetary Sciences of the American Astronomical Society
Event Location:Reno, Nevada,USA
Event Type:international Conference
Event Dates:14.-19.10.12
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben CASSINI (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Aydin, Zeynep
Deposited On:09 Jan 2013 11:23
Last Modified:09 Jan 2013 11:23

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