Results 41 to 50 of about 374 (187)

Study and Evolution of the Dune Field of La Banya Spit in Ebro Delta (Spain) Using LiDAR Data and GPR

open access: yesRemote Sensing, 2021
La Banya spit, located at the south of the River Ebro Delta, is a sandy formation, developed by annexation of bars forming successive beach ridges, which are oriented and modeled by the eastern and southern waves.
Inmaculada Rodríguez-Santalla   +9 more
doaj   +1 more source

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

open access: yesEuropean 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   +2 more
wiley   +1 more source

Barchan‐Barchan Dune Repulsion Investigated at the Grain Scale

open access: yesJournal of Geophysical Research: Earth Surface
AbstractBarchans are eolian dunes of crescent shape found on Earth, Mars and other celestial bodies. Among the different types of barchan‐barchan interaction, there is one, known as chasing, in which the dunes remain close but without touching each other.
N. C. Lima   +3 more
openaire   +2 more sources

On the crescentic shape of barchan dunes [PDF]

open access: yesThe European Physical Journal B - Condensed Matter, 2004
Aeolian sand dunes originate from wind flow and sand bed interactions. According to wind properties and sand availability, they can adopt different shapes, ranging from huge motion-less star dunes to small and mobile barchan dunes. The latter are crescentic and emerge under a unidirectional wind, with a low sand supply.
openaire   +3 more sources

Automatic Classification of Planetary Surfaces Using Autoencoders With Applications to Dunes in the North Polar Erg of Mars

open access: yesJournal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract The 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 and may introduce observer bias.
Yasmin Hayat, Lior Rubanenko
wiley   +1 more source

Point locations for spatial and morphological analyses of barchans in swarms

open access: yes
This dataset contains the long-lat coordinates of seven points on ~6000 barchans located in six swarms. Four of the locations are on Earth (three in the Tarfaya region of the Western Sahara, one in Mauritania).
Geography   +5 more
core   +2 more sources

Real-Time Kinematic Positioning (RTK) for Monitoring of Barchan Dune Migration in the Sanlongsha Dune Field, the Northern Kumtagh Sand Sea, China

open access: yesRemote Sensing, 2023
Dune migration is one of the main processes in arid lands’ geomorphology and is important for the design of windbreaks and sand fixation projects and for the monitoring of desertification dynamics. We conducted long-term continuous positioning monitoring
Xuegang Xing   +3 more
doaj   +1 more source

Terrestrial Analogs to Titan for Geophysical Research

open access: yesReviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Saturn's moon Titan exhibits remarkable parallels to the Earth in many geophysical and geological processes not found elsewhere in the solar system at the present day. These include a nitrogen atmosphere with a condensible gas—methane—replacing the Earth's water, leading to an active meteorology with rainfall and surface manifestations ...
Conor A. Nixon   +21 more
wiley   +1 more source

Variations in downslope activity and bottom current dynamics in a land‐detached submarine channel system since the Last Glacial Maximum

open access: yesSedimentology, Volume 73, Issue 3, Page 620-644, April 2026.
ABSTRACT The Gollum Channel System is a land‐detached large‐scale canyon‐channel system situated offshore southwest Ireland on the Northeast Atlantic margin. The system has been considered inactive with downslope gravity flows since the last glacial period, but geophysical data in some of its branches do suggest Holocene activity.
Lotte Verweirder   +8 more
wiley   +1 more source

The Sources of Moisture in the Sand Dunes – The Example of the Western Sahara Dune Field

open access: yesQuaestiones Geographicae, 2014
Climatic and meteorological conditions may limit the aeolian transport within barchans. An explanation of that issue was the main goal of the investigation held in Western Sahara dune fields located around Tarfaya and Laâyoune.
Żmudzka Elwira   +2 more
doaj   +1 more source

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