Results 61 to 70 of about 374 (187)
Quantifying the Form‐Flow‐Saltation Dynamics of Aeolian Sand Ripples
Journal of Geophysical Research: Earth Surface, Volume 130, Issue 10, October 2025.Abstract Ripples are the most fundamental and ubiquitous aeolian bedforms formed on sandy surfaces, but their small size and fast response times make them inherently difficult to measure. However, these attributes also make ripples excellent flow indicators, and they have been used extensively in planetary locations for this purpose.
Joanna M. Nield +11 more
wiley +1 more source
Morphology of Barchan Dunes on Earth and Mars:Classification and Scale-Invariance [PDF]
Morphological characteristics were measured for barchan dunes on Earth (2,686 dunes in 30 barchan fields) and Mars (720 dunes in 10 barchan fields) using satellite images. The data were used to (a) develop a new barchan classification system; (b) compare
Bae, Jinsu +4 more
core +1 more source
How attractive is a barchan dune?
New Journal of Physics, 2009 The spatio-temporal behaviour of barchan dunes is investigated experimentally with downsized longitudinal barchan dune slices generated in a narrow water flow tube. The development towards a shape attractor is shown on the basis of four different starting configurations in qualitative observation and quantitative analysis.
Christopher Groh +2 more
openaire +3 more sources
Recent Dune Migration Along the Coastal Plain of Canoa Quebrada, Ceará State, Northeast Brazil
Journal of Environmental Geography, 2019 In the coastal area of Ceará State, northeast Brazil, there are large mobile dunefields, including barchans, barchanoid dunes and sandsheets. The migration rate of these dunes, as measured by several studies, varies between 32 m/y and 9 m/y.
Pedrosa Adriana Albuquerque +3 more
doaj +1 more source
Bubble Printing of Anisotropic Clay Nanotubes
Advanced Optical Materials, Volume 13, Issue 25, September 3, 2025.Bubble printing patterns of lyotropic liquid crystal nanotubes form toroidal or linear patterns depending on laser movement and colloidal stability. Long nanotubes create radial filament bundles, while poor electrostatic repulsion hinders deposition.
Claire Hotton +2 more
wiley +1 more source
Behavior and identification of ephemeral sand dunes at the backshore zone using video images
Anais da Academia Brasileira de Ciências, 2016 The backshore zone is transitional environment strongly affected by ocean, air and sand movements. On dissipative beaches, the formation of ephemeral dunes over the backshore zone plays significant contribution in the beach morphodynamics and sediment ...
PEDRO V. GUIMARÃES +3 more
doaj +1 more source
Corridors of barchan dunes: Stability and size selection [PDF]
Physical Review E, 2004 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 reproduce these corridors. Instead, two instabilities take place.
Hersen, Pascal +5 more
openaire +4 more sources
ChemistrySelect, Volume 10, Issue 34, September 8, 2025.Investigation of flavonoid extract of Hyoscyamus albus L. Abstract The current study aimed to determine the phytochemical composition of the flavonoid‐rich extract of Hyoscyamus albus L. (FEHA), collected from the Khenchela region, and to investigate its multiple bioactivities. Phytochemical profiling was explored using LC‐MS and FTIR.
Nour Elhouda Ayeb +11 more
wiley +1 more source
Pioneering Evidence of the Dynamics of Water Vapor and CO2 Fluxes in Sahara Desert Soils
Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 9, September 2025.Abstract Soil CO2 flux (Fc) is a major component of the global carbon balance. It is often overlooked in arid regions as low soil moisture restricts microbial and root respiration. Studies in the last decades challenge this paradigm, reporting an anomalous diurnal cycle of Fc in arid regions. This diurnal cycle is thought to be initiated by geochemical
N. Bekin +5 more
wiley +1 more source
Slowdown of Dune Migration in East Asia's Inland Deserts: A 35‐Year Response to Wind Stilling
Geophysical Research Letters, Volume 52, Issue 16, 28 August 2025.Abstract Global terrestrial stilling, the recent decrease in near‐surface wind speeds, has significant environmental impacts, including reduced dust storms and vegetation recovery in East Asia's drylands. However, direct evidence of stilling effects on sand dunes is limited due to the lack of long‐term observational data.
Li Wang +7 more
wiley +1 more source