Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Periodicity in fields of elongating dunes

C. Gadal, C. Narteau, S. Courrech du Pont, O. Rozier and P. Claudin
Periodicity in fields of elongating dunes
Geology (Boulder) (January 2020) 48 (4): 343-347

Abstract

Dune fields are commonly associated with periodic patterns that are among the most recognizable landscapes on Earth and other planetary bodies. However, in zones of limited sediment supply, where periodic dunes elongate and align in the direction of the resultant sand flux, there has been no attempt to explain the emergence of such a regular pattern. Here, we show, by means of numerical simulations, that the elongation growth mechanism does not produce a pattern with a specific wavelength. Periodic elongating dunes appear to be a juxtaposition of individual structures, the arrangement of which is due to regular landforms at the border of the field acting as boundary conditions. This includes, among others, dune patterns resulting from bed instability, or the crestline reorganization induced by dune migration. The wavelength selection in fields of elongating dunes therefore reflects the interdependence of dune patterns over the course of their evolution.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 48
Serial Issue: 4
Title: Periodicity in fields of elongating dunes
Affiliation: Universite de Paris, Institut de Physique du Globe de Paris, Paris, France
Pages: 343-347
Published: 20200131
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 41
Accession Number: 2020-028651
Categories: Geomorphology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA
Illustration Description: illus.
Secondary Affiliation: Ecole Superieure de Physique et de Chimie Industrielles de La Ville de Paris, FRA, France
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 202019
Close Modal

or Create an Account

Close Modal
Close Modal