Results 1 to 10 of about 118,412 (150)

Barchan dunes cruising dune-size obstacles

Geophysical Research Letters, 2023
AbstractWe investigate the behavior of subaqueous barchans reaching dune‐size obstacles by carrying out experiments where we varied the obstacle shape and size, the flow strength, and the grains' properties. We found that a subaqueous barchan can pass over or bypass a dune‐size obstacle, or even be blocked, with some intermediate situations.
W. R. Assis, D. S. Borges, E. M. Franklin   +2 more
openaire   +3 more sources

Extending DUNE: The dune-xt modules

CoRR, 2016
Abstract: We present our effort to extend and complement the core modules of the Dis- tributed and Unified Numerics Environment DUNE (http://dune-project.org) by a well tested and structured collection of utilities and concepts. We describe key elements of our four modules dune-xt-common, dune-xt-grid, dune-xt-la and dune-xt-functions, which aim add ...
Tobias Leibner, René Milk, Felix Schindler   +2 more
openaire   +2 more sources

When dunes move together, structure of deserts emerges [PDF]

, 2012
Crescent shaped barchan dunes are highly mobile dunes that are usually presented as a prototypical model of sand dunes. Although they have been theoretically shown to be unstable when considered separately, it is well known that they form large ...
Grégoire, Guillaume, Génois, Mathieu, Hersen, Pascal, Pont, Sylvain Courrech du   +3 more
core   +4 more sources

Corridors of barchan dunes: stability and size selection [PDF]

, 2003
Barchans are crescentic dunes propagating on a solid ground. They form dune fields in the shape of elongated corridors in which the size and spacing between dunes are rather well selected. We show that even very realistic models for solitary dunes do not
A. Coursin, A. D. Howard, A. D. Howard, A. R. Lima, B. Andreotti, B. Andreotti, B. B. Willetts, B. T. Werner, F. K. Wippermann, F. Rioual, G. Sauermann, G. Sauermann, H. J. Finkel, H. J. L. Beadnell, J. C. R. Hunt, J. D. Iversen, J. H. van Boxel, J. L. Jensen, J. T. Long, K. Kroy, K. Lettau, K. R. Mulligan, K. R. Rasmussen, K. R. Rasmussen, M. C. Slattery, M. Sørensen, O. Zeman, P. A. Hesp, P. Hersen, P. Nalpanis, P. R. Owen, P. S. Jackson, R. M. Norris, R. S. Anderson, R. S. Anderson, R. S. Anderson, S. L. Hastenrath, S. L. Hastenrath, W. S. Weng   +38 more
core   +4 more sources

Edge-detection applied to moving sand dunes on Mars [PDF]

, 2013
Here we discuss the application of an edge detection filter, the Sobel filter of GIMP, to the recently discovered motion of some sand dunes on Mars. The filter allows a good comparison of an image HiRISE of 2007 and an image of 1999 recorded by the Mars ...
Sparavigna, Amelia Carolina
core   +2 more sources

Dunes on Pluto

Science, 2018
Methane ice dunes on Pluto Wind-blown sand or ice dunes are known on Earth, Mars, Venus, Titan, and comet 67P/Churyumov-Gerasimenko. Telfer et al. used images taken by the New Horizons spacecraft to identify dunes in the Sputnik Planitia region on Pluto (see the Perspective by Hayes).
Matt W. Telfer, Eric J. R. Parteli, Jani Radebaugh, Ross A. Beyer, Tanguy Bertrand, François Forget, Francis Nimmo, Will M. Grundy, Jeffrey M. Moore, S. Alan Stern, John Spencer, Tod R. Lauer, Alissa M. Earle, Richard P. Binzel, Hal A. Weaver, Cathy B. Olkin, Leslie A. Young, Kimberly Ennico, Kirby Runyon, Marc Buie, Bonnie Buratti, Andy Cheng, J.J. Kavelaars, Ivan Linscott, William B. McKinnon, Harold Reitsema, Dennis Reuter, Paul Schenk, Mark Showalter, Len Tyler   +29 more
openaire   +3 more sources

Earth-like sand fluxes on Mars [PDF]

, 2012
Strong and sustained winds on Mars have been considered rare, on the basis of surface meteorology measurements and global circulation models, raising the question of whether the abundant dunes and evidence for wind erosion seen on the planet are a ...
Avouac, J.-P., Ayoub, F., Bridges, N. T., Leprince, S., Lucas, A., Mattson, S.   +5 more
core   +2 more sources

Dune-CurvedGrid - A Dune module for surface parametrization

, 2020
Archive of Numerical Software, Vol. 1 No. 1 (2022)
Praetorius, Simon, Stenger, Florian
openaire   +2 more sources

The dune size distribution and scaling relations of barchan dune fields [PDF]

, 2008
Barchan dunes emerge as a collective phenomena involving the generation of thousands of them in so called barchan dune fields. By measuring the size and position of dunes in Moroccan barchan dune fields, we find that these dunes tend to distribute ...
Durán, Orencio, Herrmann, Hans J., Lind, Pedro G., Schwämmle, Veit   +3 more
core   +4 more sources

Modelling transverse dunes

, 2003
Transverse dunes appear in regions of mainly unidirectional wind and high sand availability. A dune model is extended to two dimensional calculation of the shear stress.
Herrmann, Hans J., Schwämmle, Veit
core   +2 more sources