Possible tropical lakes on Titan from observations of dark terrain

  title={Possible tropical lakes on Titan from observations of dark terrain},
  author={Caitlin Ann Griffith and Juan Manuel Lora and Jake D. Turner and Paulo Fernando Penteado and Robert H. Brown and Martin George Tomasko and Lyn Doose and Charles See},
Titan has clouds, rain and lakes—like Earth—but composed of methane rather than water. Unlike Earth, most of the condensable methane (the equivalent of 5 m depth globally averaged) lies in the atmosphere. Liquid detected on the surface (about 2 m deep) has been found by radar images only poleward of 50° latitude, while dune fields pervade the tropics. General circulation models explain this dichotomy, predicting that methane efficiently migrates to the poles from these lower latitudes. Here we… 
Possible temperate lakes on Titan
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
The near-surface methane humidity on Titan
We retrieve vertical and meridional variations of methane mole fraction in Titan's lower troposphere by re-analyzing near-infrared ground-based observations from 17 July 2014 UT (Adamkovics et al.,
The Climate of Titan
Over the past decade, the Cassini-Huygens mission to the Saturn system has revolutionized our understanding of Titan and its climate. Veiled in a thick organic haze, Titan's visible appearance belies
Observations obtained over two years by the Cassini Imaging Science Subsystem suggest that rain showers fall on the surface. Using measurements obtained by the Visual Infrared Mapping Spectrometer,
Titan’s surface spectra at the Huygens landing site and Shangri-La
Abstract Titan is an icy satellite of Saturn with a dense atmosphere and covered by a global photochemical organic haze. Ground based observations and the Huygens descent probe allowed to retrieve
A corridor of exposed ice-rich bedrock across Titan’s tropical region
Global maps of Titan show great diversity in terrain types, but their associations with specific compositions on a large scale are obscured by Titan’s thick atmosphere, which shrouds the weak
Evidence of Titan’s climate history from evaporite distribution
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
Non-uniform global methane distribution in Titan’s troposphere evidenced by Cassini radio occultations
Abstract The global distribution of atmospheric pressure retrieved from Cassini radio occultations is reanalyzed and interpreted in a meteorological context. The retrieval of Titan’s atmospheric
Titan's surface and atmosphere from Cassini/VIMS data with updated methane opacity
Abstract We present an analysis of Titan data acquired by the Cassini Visual and Infrared Mapping Spectrometer (VIMS), making use of recent improvements in methane spectroscopic parameters in the
Titan's transport-driven methane cycle
The mechanisms behind the occurrence of large cloud outbursts and precipitation on Titan have been disputed. A global- and annual-mean estimate of surface fluxes indicated only 1% of the insolation,


Storms in the tropics of Titan
These observations show that convective pulses at one latitude can trigger short-term convection at other latitudes, even those not generally considered capable of supporting convection, and may also explain the presence of methane-carved rivers and channels near the Huygens landing site.
Evidence for surface heterogeneity on Titan
UNLIKE all other planetary satellites, Saturn's moon Titan has a massive atmosphere1–8. At visible wavelengths, a thick stratospheric haze hides the surface from view. The emission from Titan in the
The lakes of Titan
These northern-hemisphere lakes constitute the strongest evidence yet that a condensable-liquid hydrological cycle is active in Titan’s surface and atmosphere, in which the lakes are filled through rainfall and/or intersection with the subsurface ‘liquid methane’ table.
Characterization of clouds in Titan's tropical atmosphere
Images of Titan's clouds, possible over the past 10 years, indicate primarily discrete convective methane clouds near the south and north poles and an immense stratiform cloud, likely composed of
Polar methane accumulation and rainstorms on Titan from simulations of the methane cycle
It is found that methane is cold-trapped and accumulates in polar regions, preferentially in the north because the northern summer, at aphelion, is longer and has greater net precipitation than the southern summer.
Rapid and Extensive Surface Changes Near Titan’s Equator: Evidence of April Showers
The detection by Cassini's Imaging Science Subsystem of a large low-latitude cloud system early in Titan’s northern spring and extensive surface changes in the wake of this storm are reported, which suggests that the dry channels observed at Titan's low latitudes are carved by seasonal precipitation.
The drying of Titan's dunes: Titan's methane hydrology and its impact on atmospheric circulation
[1] We explore the effect of a finite reservoir of methane on Titan's atmospheric circulation, precipitation patterns, and surface methane content. We develop a soil model that accounts for the
Transient surface liquid in Titan’s polar regions from Cassini
Cassini RADAR images of Titan’s south polar region acquired during southern summer contain lake features which disappear between observations. These features show a tenfold increases in backscatter
Latitudinal variations in Titan's methane and haze from Cassini VIMS observations
Abstract We analyze observations taken with Cassini’s Visual and Infrared Mapping Spectrometer (VIMS), to determine the current methane and haze latitudinal distribution between 60°S and 40°N. The
Dunes on Titan observed by Cassini Radar
Thousands of longitudinal dunes have recently been discovered by the Titan Radar Mapper on the surface of Titan. These are found mainly within ±30° of the equator in optically-, near-infrared-, and