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Physics of Fluids / Volume 12 / Issue 6 / ARTICLES

Phys. Fluids 12, 1529 (2000); doi:10.1063/1.870401 (6 pages)

Statistics of wind direction and its increments

Eric van Doorn1, Brindesh Dhruva1, Katepalli R. Sreenivasan1, and Victor Cassella2

1Mason Laboratory, Yale University, New Haven, Connecticut 06520-8286
2Brookhaven National Laboratory, Upton, New York 11973

(Received 26 March 1999; accepted 6 March 2000)

We study some elementary statistics of wind direction fluctuations in the atmosphere for a wide range of time scales (10−4 sec to 1 h), and in both vertical and horizontal planes. In the plane parallel to the ground surface, the direction time series consists of two parts: a constant drift due to large weather systems moving with the mean wind speed, and fluctuations about this drift. The statistics of the direction fluctuations show a rough similarity to Brownian motion but depend, in detail, on the wind speed. This dependence manifests itself quite clearly in the statistics of wind-direction increments over various intervals of time. These increments are intermittent during periods of low wind speeds but Gaussian-like during periods of high wind speeds. © 2000 American Institute of Physics.

© 2000 American Institute of Physics

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KEYWORDS and PACS

Keywords

statistical analysis, time series, Brownian motion, WIND, STATISTICAL DATA, FLUCTUATIONS, EARTH ATMOSPHERE, BROWNIAN MOVEMENT, VELOCITY

PACS

  • 92.60.Gn

    Winds and their effects

  • 05.40.Jc

    Brownian motion

  • 02.50.-r

    Probability theory, stochastic processes, and statistics

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.870401

PUBLICATION DATA

ISSN:

1070-6631 (print)  
1089-7666 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    B. Dhruva, Y. Tsuji, and K. R. Sreenivasan, "Transverse structure functions in high-Reynolds-number turbulence," Phys. Rev. E 56, R4928 (1997).


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