Results 71 to 80 of about 374 (187)

Resultant Force on Grains of a Real Sand Dune: How to Measure It?

Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.
Abstract Barchan dunes usually appear under the action of one‐directional fluid flows, being found on Earth, Mars, and other celestial bodies; however, although ubiquitous in nature, understanding dune dynamics at the grain scale is challenging due to the vast number of grains involved.
R. F. Miotto, C. A. Alvarez, D. S. Borges, W. R. Wolf, E. M. Franklin   +4 more
wiley   +1 more source

Campos de dunas em Jericoacoara: intervenções humanas como possível indicador de mudança na dinâmica morfológica

Confins, 2018
Coastal dunes play an important role in the sediment transport of the coastal zone. The morphology of the Jericoacoara National Park in the northeastern Brazilian state of Ceará consists of a headland covered by a mobile dune field consisting of large ...
Antonio Jeovah Meireles, Adryane Gorayeb, Narcélio de Sá Pereira Filho   +2 more
doaj   +1 more source

Surface Dust Coverages on Rock Targets in Gale Crater: Influence of Elevation, Proximity to Aeolian Sand Fields and Seasonality

Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.
Abstract Martian dust is mobilized throughout the year by local, regional, and global dust storms, influencing atmospheric opacity and inhibiting observations of the surface. Using Mars Hand Lens Imager (MAHLI) images and methods of Schmidt et al. (2018), https://doi.org/10.1029/2018je005553, areal dust coverages on 368 near‐horizontal, undisturbed ...
T. L. J. Henley, M. E. Schmidt, K. W. Lewis, J. E. Moores, C. Hayes, S. L. Bray, N. J. Bradley, R. E. Lee, I. K. Marincic, K. W. Turner, S. D. Guzewich, C. E. Newman, G. Bischof, D. Viúdez‐Moreiras   +13 more
wiley   +1 more source

An agent-based model of dune interactions produces the emergence of patterns in deserts

, 2013
Crescent-shaped barchan dunes are highly mobile dunes which are ubiquitous on Earth and other solar system bodies. Although they are unstable when considered separately, they form large assemblies in deserts and spatially organize in narrow corridors ...
Hersen, Pascal, Courrech Du Pont, Sylvain, Génois, Mathieu, Grégoire, Guillaume   +3 more
core   +1 more source

Dune fields in Jericoacoara: human intervention as a possible indicator of changes in the morphological dynamics

Confins, 2018
Coastal dunes play an important role in the sediment transport of the coastal zone. The morphology of the Jericoacoara National Park in the northeastern Brazilian state of Ceará consists of a headland covered by a mobile dune field consisting of large ...
Antonio Jeovah Meireles, Adryane Gorayeb, Narcélio de Sá Pereira Filho   +2 more
doaj   +1 more source

Scour Pits in the Medusae Fossae Formation and Olympus Mons Region on Mars

Journal of Geophysical Research: Planets, Volume 130, Issue 7, July 2025.
Abstract The Medusae Fossae Formation (MFF) covers a region of Mars located to the southwest of the Olympus Mons shield volcano. The nature of this formation has been under debate for over 30 years. In order to better understand the MFF, we investigated scour pits or V‐shaped depressions carved into many places across the MFF.
Santa L. Pérez‐Cortés, Ali M. Bramson, Christina M. Sowinski, Mackenzie Day   +3 more
wiley   +1 more source

Multidirectional Dune Dynamics Under Seasonal Winds on Mars

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract We present a systematic assessment of the complex aeolian bedforms across the western rim of Hellas Planitia, the largest impact basin on Mars. Repeat orbital imaging shows crescentic, transverse, and star dunes across the Hellespontus Montes region migrate, converge, and occasionally reverse course.
Matthew Chojnacki, David A. Vaz, Pruthviraj J. Acharya, Simone Silvestro, Isaac B. Smith   +4 more
wiley   +1 more source

Coastal Dunes of the Baltic Sea Shores: A Review

Quaestiones Geographicae, 2018
The article summarises results of studies conducted along the Baltic Sea sandy coasts by scientists involved in coastal dune research, and presents an attempt to describe the types and distribution of dune coasts.
Łabuz Tomasz Arkadiusz, Grunewald Ralf, Bobykina Valentina, Chubarenko Boris, Česnulevičius Algimantas, Bautrėnas Artūras, Morkūnaitė Regina, Tõnisson Hannes   +7 more
doaj   +1 more source

Barchan swarm dynamics from a Two-Flank Agent-Based Model [PDF]

Earth Surface Dynamics
In this work, we simulate barchan swarms using the Two-Flank Agent-Based Model and investigate how changes to model parameters and environmental drivers lead to different swarm dynamics.
D. T. Robson, D. T. Robson, A. C. W. Baas   +2 more
doaj   +1 more source

Dataset for ''On the effect of two-direction seasonal flows on barchans and the origin of occluded dunes''

This is part of the data concerning numerical simulations on different directional flows on subaqueous barchans. In this dataset, you find the movies for high and low frequencies of oscillations, images of the cases, Matlab codes used to post-process ...
Righi Assis, W (via Mendeley Data)
core   +1 more source