Four. Pattern in Free Dunes

  1. Andrew Warren

Published Online: 27 MAR 2013

DOI: 10.1002/9781118295786.ch4

Dunes: Dynamics, Morphology, History

Dunes: Dynamics, Morphology, History

How to Cite

Warren, A. (2013) Pattern in Free Dunes, in Dunes: Dynamics, Morphology, History, John Wiley & Sons, Oxford. doi: 10.1002/9781118295786.ch4

Publication History

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

ISBN Information

Print ISBN: 9781444339697

Online ISBN: 9781118295786

SEARCH

Keywords:

  • dune pattern;
  • linear dunes;
  • sand;
  • transverse dunes;
  • wind-directional regimes

Summary

Pattern includes both the three-dimensional shape of individual dunes and the pattern of groups of dune. This chapter is about prototype patterns, defined as those: (1) whose essential features are replicated over extensive areas; (2) that persist over long periods of time, despite a continuous throughput of sand (even, in some cases, despite a change of winds); (3) that are composed of elements that maintain their essential characteristics and relationships as they move downwind (in transverse dunes), are elongated (in linear dunes) or grow upward (in star dunes); (4) that occur in some extraterrestrial atmospheres, as on Mars, Venus or Titan; and (5) that are active, and without a history beyond the time they take to form. The central assumption in this chapter is that wind directionality is the primary control of the differentiation of pattern, an assumption that is shared by most of the literature on dune pattern.