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On characteristics of wind direction fluctuations in the surface layer

✍ Scribed by H. A. Panofsky; C. A. Egolf; R. Lipschutz

Publisher
Springer
Year
1978
Tongue
English
Weight
433 KB
Volume
15
Category
Article
ISSN
0006-8314

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✦ Synopsis

It is shown that the ratio of standard deviation of lateral velocity to the friction velocity, o;/u,, and therefore wind direction fluctuations, are sensitive to mesoscale terrain properties.

Under neutral conditions, a,/~, is almost 40% larger in rolling terrain than over a horizontal surface. In the lee of a low mountain, the fluctuations may be 2.5 times as strong as over horizontal terrain.

In contrast, vertical velocity fluctuations are little influenced by mesoscale terrain features.

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