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Possible temperate lakes on Titan
- Source :
- Icarus, Icarus, Elsevier, 2015, 257, pp.313-323. ⟨10.1016/j.icarus.2015.05.009⟩, Icarus, 2015, 257, pp.313-323. ⟨10.1016/j.icarus.2015.05.009⟩
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- International audience; We analyze southern mid-latitude albedo-dark features on Titan observed by Cassini's Visual and Infrared Mapping Spectrometer (VIMS). In exploring the nature of these features we consider their morphology, albedo, and specular reflectivity. We suggest that they represent candidates for potential temperate lakes. The presence of lakes at the mid-latitudes would indicate that surface liquid can accumulate and remain stable away from Titan's poles. Candidate lakes were identified by looking for possible shorelines with lacustrine morphology. Then, we applied an atmospheric correction that empirically solved for their surface albedo. Finally, we looked for a specular reflection of the sky in the identified candidates. Using this prescription, we find two candidates that remain as potential temperature lakes. If candidate features do represent temperate lakes on Titan, they have implications for formation mechanisms such as clouds and rainfall or, in low elevation areas, percolation and subsurface flow. Clouds were observed near candidate lake locations on the T66 flyby and this latitude band showed many clouds during southern summer. Our techniques can be applied to areas of Titan that lack RADAR coverage to search for mid-and low-latitude lakes in the future.
- Subjects :
- 010504 meteorology & atmospheric sciences
[PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
media_common.quotation_subject
atmosphere Titan
Atmospheric sciences
01 natural sciences
Latitude
symbols.namesake
hydrology Titan
surface Radiative transfer
0103 physical sciences
Potential temperature
Atmosphere of Titan
Subsurface flow
010303 astronomy & astrophysics
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
media_common
Shore
geography
geography.geographical_feature_category
Atmospheric correction
Astronomy and Astrophysics
[SDU]Sciences of the Universe [physics]
13. Climate action
Space and Planetary Science
Sky
symbols
Titan
Titan (rocket family)
Geology
Subjects
Details
- ISSN :
- 00191035 and 10902643
- Volume :
- 257
- Database :
- OpenAIRE
- Journal :
- Icarus
- Accession number :
- edsair.doi.dedup.....7b3372223aa8ab85255f0cd1efb8b524
- Full Text :
- https://doi.org/10.1016/j.icarus.2015.05.009