Results 91 to 100 of about 374 (187)

From Macro- to Microscale: A combined modelling approach for near-surface wind flow on Mars at sub-dune length-scales. [PDF]

PLoS One, 2022
Love R, Jackson DWT, Michaels T, Smyth TAG, Avouac JP, Cooper A.   +5 more
europepmc   +1 more source

Th e sources of moisture in the barchans of Western Sahara

, 2012
The aim of the study was to determine the impact of climatic and meteorological conditions on aeolian sand transport within barchans. The study area was located at Western Sahara, around the towns of Tarfaya and Laâyoune. Particular attention was paid to
Dluzewski, M., Zmudzka, E., Woronko, D., Biejat, K.   +3 more
core  

Mean sediment residence time in barchan dunes

, 2014
International audienceWhen a barchan dune migrates, the sediment trapped on its lee side is later mobilized when exposed on the stoss side. Then sand grains may undergo many dune turnover cycles before their ejection along the horns, but the amount of ...
Zhang, D., Yang, X., Narteau, C., Rozier, O.   +3 more
core   +1 more source

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

The Initial Opening of the Drake Passage Occurred During ca. 62‐59 Ma

Geophysical Research Letters
Although the Drake Passage has been considered a critical component of ocean circulation and climate, its initial opening age remains controversial due to the weak constraints on the paleoposition of the Antarctic Peninsula.
Liang Gao, Xiaoqian Guo, Junling Pei, Javier N. Gelfo, Xinwei Hu, Sha Li, Tian Jiang, Meinan Shi, Xuelian You, Fang Gu, Yunying Zhang, Zhen Sun, Zhiliang He, Ruoshuang Li, Yabo Tong, Zhenyu Yang, Yue Zhao   +16 more
doaj   +1 more source

Horns of subaqueous barchan dunes : a study at the grain scale

, 2020
Many complex aspects are involved in the morphodynamics of crescent-shaped dunes, known as barchans. One of them concerns the trajectories of individual grains over the dune and how they affect its shape.
Alvarez, Carlos A., Franklin, Erick M.
core   +1 more source

Equilibrium versus disequilibrium of barchan dunes

, 2011
Barchans are crescent dunes which take place in mainly mono-directional winds. Shape, aspect ratios and velocities of these dunes had been studied as if they were in equilibrium, in a stable state.
EL BELRHITI Hicham, DOUADY Stéphane
core   +1 more source

Shape evolution of numerically obtained subaqueous barchan dunes

, 2020
In the realm of granular bedforms, barchan dunes are strong attractors that can be found in rivers, terrestrial deserts, and other planetary environments.
Alvarez, Carlos A., Franklin, Erick M.
core   +1 more source

Strong-wind events control barchan dune migration

Communications Earth & Environment
Wind is the most important external force in shaping aeolian landforms. Yet, it remains unclear what role the strong-wind events will play in the development of aeolian landforms compared with the effect of regular winds.
Hongjing Ren, Xin Gao, Yongcheng Zhao, Jiaqiang Lei, Philippe De Maeyer, Alain De Wulf   +5 more
doaj   +1 more source

Geochemical, Mineralogical, and Geomorphological Characterization of Ash Materials as a Tracer for the Origin of Shifting Sands near Oldupai Gorge, Ngorongoro, Tanzania. [PDF]

ScientificWorldJournal, 2022
Makongoro MZ, Vegi MR, Vuai SAH, Msabi MM.   +3 more
europepmc   +1 more source