Results 1 to 10 of about 590 (205)
Barchan Dunes Cruising Dune‐Size Obstacles
Geophysical Research Letters, 2023 We 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.
W R Assis, D S Borges, Erick M Franklin
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Microbial Characterization of Qatari Barchan Sand Dunes. [PDF]
PLoS ONE, 2016 This study represents the first characterization of sand microbiota in migrating barchan sand dunes. Bacterial communities were studied through direct counts and cultivation, as well as 16S rRNA gene and metagenomic sequence analysis to gain an ...
Sara Abdul Majid +8 more
doaj +6 more sources
Detection and tracking of barchan dunes using artificial intelligence [PDF]
Scientific ReportsBarchans are crescent-shape dunes ubiquitous on Earth and other celestial bodies, which are organized in barchan fields where they interact with each other.
Esteban A. Cúñez, Erick M. Franklin
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021 The morphology of isolated barchan dunes on Mars and Earth may shed light on the dynamic conditions that form them, their migration direction and the physical properties of the sediments composing them.
Lior Rubanenko, Mathieu G A Lapôtre
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A distinct ripple-formation regime on Mars revealed by the morphometrics of barchan dunes [PDF]
Nature Communications, 2022 Dust storms on Mars drive water escape to space. Here, the authors show the impact Martian dust storms have on the abundance of atmospheric hydrogen and oxygen, and how this helps to overall oxidize the Martian atmosphere.
Lior Rubanenko +4 more
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Quantitative Study on Morphological Characteristics of Barchan Dunes in Yamarak Desert, China
Frontiers in Earth Science, 2022 Although scholars have conducted many studies on barchan dunes in deserts and sandy areas around the world, few studies have been conducted on the morphological characteristics and changes in movement patterns of barchan dunes in the Yamarak Desert ...
Jia Guang-Pu +4 more
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Global Surface Winds and Aeolian Sediment Pathways on Mars From the Morphology of Barchan Dunes
Geophysical Research Letters, 2023 In the absence of consistent meteorological data on Mars, the morphology of dunes can be employed to study its atmosphere. Specifically, barchan dunes, which form under approximately unimodal winds, are reliable proxies for the dominant wind directions ...
Lior Rubanenko +2 more
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Dataset of turbulent flow over interacting barchan dunes [PDF]
Data in BriefBarchans are dunes commonly found in dune fields on Earth, Mars and other celestial bodies, where they can interact with each other. This article concerns experimental data for the flow over subaqueous barchans that are either isolated or interacting ...
Jimmy G. Alvarez +2 more
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Resultant Force on Grains of a Real Sand Dune: How to Measure It?
Geophysical Research LettersBarchan 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 ...
R. F. Miotto +4 more
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Journal of Geophysical Research: Machine Learning and ComputationThe study of planetary surface processes has traditionally relied on the manual interpretation of spacecraft images. While manual image analysis methods are robust and well‐established, they become impractical when the volume of available data is large ...
Yasmin Hayat, Lior Rubanenko
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