Winds of Change on Titan

  title={Winds of Change on Titan},
  author={R. Lorenz},
  pages={519 - 520}
  • R. Lorenz
  • Published 2010
  • Geology, Medicine
  • Science
Periodic strong winds blowing opposite to the prevailing wind may explain the dune orientation on Titan. On Saturn's moon Titan, giant sand dunes cover more than 20% of the surface. The orientation of thousands of dunes (1, 2) within Titan's equatorial belt indicates transport of sand from west to east (by “westerly” winds), whereas all the atmospheric circulation models suggest that the winds should be in the opposite direction. A new model by Tokano (3) may have found the resolution: Although… Expand

Paper Mentions

Implications of dune pattern analysis for Titan’s surface history
Abstract Analysis of large-scale morphological parameters can reveal the reaction of dunes to changes in atmospheric and sedimentary conditions. Over 7000 dune width and 7000 dune spacingExpand
Dune-Field Patterns
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Research on the wind environment variation improves our understanding of the process of climate change. This study examines temporal variation of the near-surface wind environment and investigatesExpand
Earth and planetary aeolian streaks: A review
Abstract Wind streaks are abundant aeolian features that have been observed on planetary surfaces by remote sensing means. They have been widely studied, particularly on Mars and Venus and to a muchExpand
Surface modification of silicone tubes by functional carboxyl and amine, but not peroxide groups followed by collagen immobilization improves endothelial cell stability and functionality.
Testing whether surface-modified silicone tubes containing different functional groups, but similar wettability, improve collagen immobilization, endothelialization, cell stability and cell-mediated NO-release allows the formation of a stable functional endothelial cell layer found that amine-group-modification seems undesirable since it affected silicone's physical properties. Expand
Dune Worlds: How Windblown Sand Shapes Planetary Landscapes
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Cette these porte sur l'etude des atmospheres de Titan et de la Terre primitive avec des modeles de circulation generale (GCM). Tout d'abord, j'ai analyse la structure thermique et la dynamique de laExpand
Physics of saltation and sand transport on Titan: A brief review
Abstract Key physical aspects of saltation and sand transport on Titan are reviewed, and the sensitivity of saltation parameters to assumptions about sand composition (most likely of ‘heavy’Expand
Dunes on Saturn’s moon Titan as revealed by the Cassini Mission
Dunes on Titan, a dominant landform comprising at least 15% of the surface, represent the end product of many physical processes acting in alien conditions. Winds in a nitrogen-rich atmosphere withExpand
Recent developments in planetary Aeolian studies and their terrestrial analogs
This report summarizes the many advances that have been made in the study of planetary Aeolian processes that have taken place since the first Planetary Dunes Workshop was held in May of 2008,Expand


Detection and mapping of hydrocarbon deposits on Titan
[1] We report the identification of compounds on Titan's surface by spatially resolved imaging spectroscopy methods through Titan's atmosphere, and set upper limits to other organic compounds. WeExpand
Relevance of fast westerlies at equinox for the eastward elongation of Titan’s dunes
Abstract Numerous linear dunes with eastward streamline pattern on Titan have mostly been interpreted as evidence of predominantly westerly (eastward) equatorial surface winds, although such windsExpand
An asymmetric distribution of lakes on Titan as a possible consequence of orbital forcing
A set of lakes filled or partially filled with liquid hydrocarbon and empty lake basins have been discovered in the high latitudes of Saturn's moon Titan. These features were mapped by the radarExpand
Global pattern of Titan's dunes: Radar survey from the Cassini prime mission
[1] We present a map of the orientation and extent of Titan's sand dunes derived from the complete radar imaging dataset from the Cassini prime mission. The 16,000 dune segments we have mapped coverExpand
In Dune Map, Titan's Winds Seem to Blow Backward
  • C. Wald
  • Medicine, Geology
  • Science
  • 2009
A new map of the dunes on Saturn9s moon Titan reveals that near-surface winds at the equator blow the wrong way: from west to east.
Multiple origins of linear dunes on Earth and Titan
The formation of dunes is controlled by the direction of the prevailing winds and the characteristics of the sediments. Linear dunes in the Qaidam Basin, China, are shown to form from cohesiveExpand
On the amount of heavy molecular ions in Titan's ionosphere
We present observational evidence that the ionosphere of Titan below an altitude of 1150 km is a significant source of heavy (4100 amu) molecular organic species. This study is based on measurementsExpand
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 theExpand
Titan's inventory of organic surface materials
[1] 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.Expand
The Sand Seas of Titan: Cassini RADAR Observations of Longitudinal Dunes
The most recent Cassini RADAR images of Titan show widespread regions that appear to be seas of longitudinal dunes similar to those seen in the Namib desert on Earth, and the distribution and orientation of the dunes support a model of fluctuating surface winds. Expand