Skip to Main content Skip to Navigation
Journal articles

Growth mechanisms and dune orientation on Titan

Abstract : Dune fields on Titan cover more than 17% of the moon's surface, constituting the largest known surface reservoir of organics. Their confinement to the equatorial belt, shape, and eastward direction of propagation offer crucial information regarding both the wind regime and sediment supply. Herein, we present a comprehensive analysis of Titan's dune orientations using automated detection techniques on nonlocal denoised radar images. By coupling a new dune growth mechanism with wind fields generated by climate modeling, we find that Titan's dunes grow by sediment transport on a nonmobile substratum. To be fully consistent with both the local crestline orientations and the eastward propagation of Titan's dunes, the sediment should be predominantly transported by strong eastward winds, most likely generated by equinoctial storms or occasional fast westerly gusts. Additionally, convergence of the meridional transport predicted in models can explain why Titan's dunes are confined within ±30 • latitudes, where sediment fluxes converge.
Complete list of metadata
Contributor : Sébastien Rodriguez Connect in order to contact the contributor
Submitted on : Tuesday, May 3, 2022 - 1:01:42 PM
Last modification on : Saturday, May 7, 2022 - 3:35:14 AM
Long-term archiving on: : Thursday, August 4, 2022 - 6:29:26 PM


Publisher files allowed on an open archive



Antoine Lucas, Sébastien Rodriguez, Clément Narteau, Benjamin Charnay, Sylvain Du Pont, et al.. Growth mechanisms and dune orientation on Titan. Geophysical Research Letters, American Geophysical Union, 2014, 41 (17), pp.6093 - 6100. ⟨10.1002/2014gl060971⟩. ⟨hal-03657811⟩



Record views


Files downloads