Results 171 to 180 of about 2,314 (214)

The Nature and Importance of Aeolian Sand Research

1990
This chapter defines the nature of aeolian processes, landforms and sediments, discusses the linkages between aeolian sand dune research and a range of scientific disciplines, and summarises some of the most important previous studies in the field. Suggestions are also made regarding future research requirements.
Kenneth Pye, Haim Tsoar
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Non-aeolian sand ripples

Europhysics Letters (EPL), 2005
By examining the initial stages of the impact of a granular jet on a flat horizontal solid surface we evidenced the existence of oscillatory sand fronts. These oscillations give rise to a novel mechanism for the formation of ripples on sand surfaces.
J. F Boudet, Y Amarouchene, B Bonnier, H Kellay   +3 more
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On the rate of aeolian sand transport

Geomorphology, 2004
A simple explicit formula for the transport rate of windblown sand is derived based on physical reasoning. The curve relating the dimensionless transport rate to the dimensionless friction speed exhibits the empirically well-established peak. In fact, the theory developed in the paper can explain the peaked shape of this curve.
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The timing and relation of aeolian sand deposition in central Spain to the aeolian sand record of NW Europe

Quaternary Science Reviews, 2001
Abstract Presented here are TL and OSL age determinations on aeolian sediments from four sites around the Guadarrama mountains in Central Spain. These show aeolian activity between 8±1 and 13±1 ka. The new data when combined with previously published luminescence data shows an inferred phase of aeolian activity in Central Spain ca. 10–13 ka.
M.D Bateman, A Dı́ez Herrero
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Aeolian deposits of clay sand

Journal of Sedimentary Research, 1972
Abstract Winter wind erosion of granular clay soils, accumulation of grains in and on snowdrifts and later deposition as elongate low ridges of sand sized aggregates ...
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Aeolian Geomorphology and its Simulation – Aeolian Sand Dunes

2009
No matter from the viewpoint of occupied area or from the complexity of dynamical behavior, sand dunes and sand dune fields are the most significant manifestation of aeolian geomorphology system. Small-scale sand ripples can not grow into large-scale sand dunes, and sand dunes have distinct characteristics compared with sand ripples.
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Internal sedimentary structures of aeolian sand deposits

1990
This chapter reviews the nature and development of the main sedimentary structures found in each major type of dune and in sand sheets. Primary internal sedimentary structures are closely related to the morphology of the bedforms and to the processes responsible for sand transport and deposition.
Kenneth Pye, Haim Tsoar
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Aeolian sand sorting and megaripple formation

Nature Physics, 2018
Sand is blown across beaches and deserts by turbulent winds. This seemingly chaotic process creates two dominant bedforms: decametre-scale dunes and centimetre-scale ripples, but hardly anything in between. By the very same process, grains are constantly sorted. Smaller grains advance faster, while heavier grains trail behind.
Marc Lämmel, Anne Meiwald, Hezi Yizhaq, Haim Tsoar, Itzhak Katra, Klaus Kroy   +5 more
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A two-species model of aeolian sand transport

Journal of Fluid Mechanics, 2004
The transport of sand by wind results from the equilibrium between the erosion of grains dragged by the flow and the resulting slow down of the wind velocity. The dynamical mechanisms governing the saturation of the sand flux are investigated theoretically.
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Source of Sand for Aeolian Sand Migration

2023
Pradeep Kumar Badapalli, Raghu Babu Kottala, Padma Sree Pujari   +2 more
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