One. Wind and Sand

  1. Andrew Warren

Published Online: 27 MAR 2013

DOI: 10.1002/9781118295786.ch1

Dunes: Dynamics, Morphology, History

Dunes: Dynamics, Morphology, History

How to Cite

Warren, A. (2013) Wind and Sand, in Dunes: Dynamics, Morphology, History, John Wiley & Sons, Oxford. doi: 10.1002/9781118295786.ch1

Publication History

  1. Published Online: 27 MAR 2013
  2. Published Print: 20 MAY 2013

ISBN Information

Print ISBN: 9781444339697

Online ISBN: 9781118295786

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Keywords:

  • dunes;
  • grain size;
  • lift-off;
  • sand;
  • sedimentary particles;
  • transport rate;
  • wind

Summary

This chapter is about the lifting and carrying of sand by the wind. As to winds at this scale, only their velocity and small-scale patterns of turbulence are relevant. As to sand, the primary interest here is in its grain size (shape in a secondary concern). In the most widely accepted taxonomy for the size of sedimentary particles, grains of ‘sand’ have diameters of between 0.625 mm and 2 mm. A global survey, by its own admission limited, but probably representative, found that most dune sands were in Wentworth's ‘fine sand’ category (0.10–0.40 mm). Once raised, particles travel in four ways, which, in order of increasing velocity, are creep, reptation, saltation and suspension.