Results 131 to 140 of about 32,835 (209)

Morphogenesis and Dynamics of Barchan Dunes

, 2004
Barchans are crescentic and mobile dunes which develop on a firm ground under a (roughly) mono directionnal wind. Since the Pioneering work of R. A. Bagnold, many studies have been performed; directly on the field or with the help of numerical models. However, barchans have a very striking property : no barchans smaller than, typically ten meters wide ...
openaire   +1 more source

Grain size, mineralogical and geochemical studies of coastal and inland dune sands from El Vizcaíno Desert, Baja California Peninsula, Mexico

Revista Mexicana de Ciencias Geológicas, 2018
A sedimentological, petrological and geochemical research work was carried out in order to find out the origin and provenance of coastal and inland desert dunes from El Vizcaíno Desert, northwestern Mexico.
Juan José Kasper-Zubillaga, Hugo Zolezzi-Ruiz   +1 more
doaj  

Widespread Megaripple Activity Across the North Polar Ergs of Mars. [PDF]

J Geophys Res Planets, 2021
Chojnacki M, Vaz DA, Silvestro S, Silva DCA.   +3 more
europepmc   +1 more source

Evolution of Turbulent Boundary Conditions on the Surface of Large Barchan Dunes: Anomalies in Aerodynamic Roughness and Shear Velocity, Aeolian Threshold, and the Role of Dune Skewness

International audienceAbstract We recorded aerodynamic roughness and shear velocity along transects on and around mature crescent‐shaped barchan dunes of and height above the horizontal rock‐covered Qatar desert by fitting to the log‐law time‐averaged ...
Harnett, S., Fang, Jiannong, Chasle, P., Porté-Agel, Fernando, Louge, M., Louge, M. Y., Porté-Agel, F., Valance, A., Chasle, Patrick, Harnett, S. J., Fang, J.   +10 more
core   +1 more source

Comprehensive grain size database of sediments of different types of dunes in Gurbantunggut Desert. [PDF]

Sci Data
Liu Z, Dong Z, Xiao N, Liu X.
europepmc   +1 more source

Dune Morphology Classification and Dataset Construction Method Based on Unmanned Aerial Vehicle Orthoimagery. [PDF]

Sensors (Basel)
Li M, Yang Z, Yan J, Li H, Ye W.
europepmc   +1 more source

Prokaryotic diversity of tropical coastal sand dunes ecosystem using metagenomics. [PDF]

3 Biotech, 2021
Shet SA, Garg S.
europepmc   +1 more source

Topography influences megadune distribution and morphology. [PDF]

Proc Natl Acad Sci U S A
Zhao H, Wang K, Sheng Y, Zhang D, Narteau C, Zhan S, Chen F.   +6 more
europepmc   +1 more source

Sand transport over a barchan dune.

, 2013
The present work investigates an important and yet unsolved issue: the relationship between the sand flux and the fluid shear stress over a spatially varying bed of particles. It is now recognized that over such a bed, the particle flux is not in equilibrium with the shear stress: there is some lag related to the particle inertia or particle settling ...
Charru, François, Laval, Vincent
openaire   +1 more source

Growing dune encroachment threatens the habitability of the western Nile riverbank. [PDF]

Sci Rep
Taha MMN, Heggy E, Ali RR, Abd-Elhameed M, Fouad SS, Ramah M.   +5 more
europepmc   +1 more source