A new approach for the determinination of horizontal wind direction fluctuations
- IBERDROLA, Madrid (Spain)
A new method to determine horizontal wind direction fluctuations {sigma}{sub {theta}} is presented based on the hypothesis of a Gaussian distribution of wind direction that gradually moves to a circular, uniform distribution under near-calm conditions. A theoretical formulation for {sigma}{sub {theta}}, the persistence of wind and the total horizontal standard deviation {sigma} is provided and supported by experimental observations, both in a complex terrain valley site and in an open grassland spot in Spain. Comparisons of the proposed model with observations yielded a fairly good agreement, making the theoretical functions a straightforward procedure for use in atmospheric dispersion calculations. The method also provides insights on either the residual diffusivity in near-calm conditions or the maximal observable standard deviation. 13 refs., 5 figs., 1 tab.
- OSTI ID:
- 273976
- Journal Information:
- Journal of Applied Meteorology, Vol. 34, Issue 9; Other Information: PBD: Sep 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Terrain-Influenced Winds and Fire-Fire Interactions in Wildland Fire Simulations [Dissertation]
Statistics of wind fluctuations over complex terrain