Evidence of Titan’s climate history from evaporite distribution - Archive ouverte HAL Access content directly
Journal Articles Icarus Year : 2014

Evidence of Titan’s climate history from evaporite distribution

(1) , (1) , (2) , (3) , (4) , (5) , (6) , (2) , (7) , (8) ,
1
2
3
4
5
6
7
8

Abstract

Water–ice-poor, 5-μm-bright material on Saturn’s moon Titan has previously been geomorphologically identified as evaporitic. Here we present a global distribution of the occurrences of the 5-μm-bright spectral unit, identified with Cassini’s Visual Infrared Mapping Spectrometer (VIMS) and examined with RADAR when possible. We explore the possibility that each of these occurrences are evaporite deposits. The 5-μm-bright material covers 1% of Titan’s surface and is not limited to the poles (the only regions with extensive, long-lived surface liquid). We find the greatest areal concentration to be in the equatorial basins Tui Regio and Hotei Regio. Our interpretations, based on the correlation between 5-μm-bright material and lakebeds, imply that there was enough liquid present at some time to create the observed 5-μm-bright material. We address the climate implications surrounding a lack of evaporitic material at the south polar basins: if the south pole basins were filled at some point in the past, then where is the evaporite?

Dates and versions

hal-03702504 , version 1 (23-06-2022)

Identifiers

Cite

Shannon Mackenzie, Jason Barnes, Christophe Sotin, Jason Soderblom, Stéphane Le Mouélic, et al.. Evidence of Titan’s climate history from evaporite distribution. Icarus, 2014, 243, pp.191-207. ⟨10.1016/j.icarus.2014.08.022⟩. ⟨hal-03702504⟩
31 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More