Results 51 to 60 of about 1,253 (211)

Process‐Based Modeling of Coastal Dune Blowout Initiation, Development, and Stabilization

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 9, September 2026.
Abstract Coastal dune blowouts are key geomorphic features that drive landward sediment transport, dune mobility, and habitat diversity, yet their conditions of formation and evolution remain poorly quantified. Using the process‐based AeoLiS model under time‐invariant wind conditions and for idealized coastal dune settings, we simulate the spontaneous ...
Bruno Castelle, Sierd de Vries, Olivier Burvingt, Alexandre Nicolae Lerma, Patrick Hesp   +4 more
wiley   +1 more source

DETECTION OF BARCHAN DUNES IN HIGH RESOLUTION SATELLITE IMAGES [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Barchan dunes are the fastest moving sand dunes in the desert. We developed a process to detect barchans dunes on High resolution satellite images. It consisted of three steps, we first enhanced the image using histogram equalization and noise reduction ...
M. A. Azzaoui, M. Adnani, H. El Belrhiti, I. E. Chaouki, C. Masmoudi   +4 more
doaj   +1 more source

Surface‐State Controls on Dust Emission Variability in Lower Mesopotamia and Kuwait Using Field and Multi‐High‐Resolution Satellite Data

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 9, September 2026.
Abstract Aeolian dust strongly influences climate, air quality, and biogeochemical cycles, yet identifying source areas and determining their surface‐state controls remain challenging. We focus on lower Mesopotamia and Kuwait, a globally significant dust source region where surface characteristics of dust sources remain poorly understood through ...
Jasem A. Albanai, Giles F. S. Wiggs, Ali Al‐Hemoud, David S. G. Thomas   +3 more
wiley   +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, Andersen, Ken H., Elbelrhiti, Hicham, Andreotti, Bruno, Claudin, Philippe, Douady, Stéphane   +5 more
openaire   +4 more sources

Steady-state migration of barchan dunes: Field evidence from the dynamic equilibrium of sediment flux

International Soil and Water Conservation Research
Barchan dunes migrate downstream while largely preserving their morphology, a process thought to result from a dynamic balance between sediment influx and outflux. However, direct field evidence and the governing mechanism of this balance remain limited.
Yuxin Liu, Xin Gao, Yuanwei Lin, Rui Liu, Xiujie Yu, Yongcheng Zhao, Jiaqiang Lei   +6 more
doaj   +1 more source

Topographic and Geological Factors Affecting Martian Transverse Aeolian Ridges: A Multi‐Source Remote Sensing Analysis of Morphology and Local Sediment Provenance

Earth and Space Science, Volume 13, Issue 7, July 2026.
Abstract Transverse aeolian ridges (TARs) on Mars exhibit distinct characteristics relative to other aeolian features, yet their formation and evolutionary mechanisms remain unclear. A comprehensive investigation of TAR's distribution, morphology, composition, and environmental influences is critical for advancing our understanding of their development
Jie Zhang, Sicong Liu, Xiaohua Tong, Paolo Gamba, Huan Xie, Yonggang Xiong, Jiang Long, Kaiyue Luo, Kecheng Du   +8 more
wiley   +1 more source

Migration of Barchan Dunes in Qatar–Controls of the Shamal, Teleconnections, Sea-Level Changes and Human Impact

Geosciences, 2018
Barchan dune fields are a dominant landscape feature in SE Qatar and a key element of the peninsula’s geodiversity. The migration of barchan dunes is mainly controlled by dune size, wind patterns, vegetation cover and human impact.
Max Engel, Fabian Boesl, Helmut Brückner   +2 more
doaj   +1 more source

High-precision remote sensing mapping of aeolian sand landforms based on deep learning algorithms

Open Geosciences, 2022
It is significant to adopt deep learning algorithms and higher-resolution remote sensing images in mapping large-scale and high-precision of aeolian landform. In this study, the western part of Horqin Sandy Land was taken as the study area.
Du Huishi, Wang Jingfa, Han Cheng
doaj   +1 more source

Specificity Toward Primary and Secondary Hydroxyls of Monosaccharides as Acceptor Substrates in Transphosphatidylation Catalyzed by Streptomyces sp. Phospholipase D

European Journal of Lipid Science and Technology, Volume 128, Issue 6, June 2026.
The conjugation of carbohydrates to a phospholipid backbone can be catalyzed via a transphosphatidylation reaction with phospholipase D (PLD). The illustration highlights the conjugation sites identified in this study for three common monosaccharides: glucose, fructose, and xylose.
Nikolina Barchan, Zoltan Takacs, Patrick Adlercreutz   +2 more
wiley   +1 more source

On the genesis and evolution of barchan dunes: morphodynamics

, 2017
Barchan dunes are crescent-shaped formations of sand that can dominate both desert and subaqueous landscapes when the supply of sand is scarce. Because of the complexity and scale of the underlying phenomena, the mechanisms governing the entire process ...
F. Sotiropoulos, A. Khosronejad
core   +1 more source