Observations of extreme speed and directional wind shear in the US great plains

Kevin Walter, Christopher C. Weiss, Andrew H.P. Swift, Jamie Chapman, Neil D. Kelley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Hourly-averaged tall-tower data is used to examine static atmospheric stability as a governor of speed and direction shear in the atmospheric boundary layer. The correlation coefficient between the average diurnal variation in static stability and power law shear exponent is found to be 1.00. Instantaneous correlation of these parameters is 0.68. The influence of static stability on speed shear is hypothesized to be globally applicable. Large magnitudes of wind direction shear are also documented and are found to occur concurrently with large magnitudes of power law shear exponent and hub-height wind speeds greater than 8 m/s. Direction shear is also found to be most prominent in statically stable conditions. Extrapolations of the results in this work suggest beneficial offshore atmospheric conditions in the form of reduced shears and more advantageous diurnal power phasing.

Original languageEnglish
Title of host publicationEuropean Wind Energy Conference and Exhibition 2007, EWEC 2007
Pages584-590
Number of pages7
StatePublished - 2007
EventEuropean Wind Energy Conference and Exhibition 2007, EWEC 2007 - Milan, Italy
Duration: May 7 2007May 10 2007

Publication series

NameEuropean Wind Energy Conference and Exhibition 2007, EWEC 2007
Volume1

Conference

ConferenceEuropean Wind Energy Conference and Exhibition 2007, EWEC 2007
CountryItaly
CityMilan
Period05/7/0705/10/07

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