Temporal Coherence: A Model for Non-stationarity in Natural and Simulated Wind Records

Published

Journal Article

© 2016, Springer Science+Business Media Dordrecht. We present a novel methodology for characterizing and simulating non-stationary stochastic wind records. In this new method, non-stationarity is characterized and modelled via temporal coherence, which is quantified in the discrete frequency domain by probability distributions of the differences in phase between adjacent Fourier components. Temporal coherence can also be used to quantify non-stationary characteristics in wind data. Three case studies are presented that analyze the non-stationarity of turbulent wind data obtained at the National Wind Technology Center near Boulder, Colorado, USA. The first study compares the temporal and spectral characteristics of a stationary wind record and a non-stationary wind record in order to highlight their differences in temporal coherence. The second study examines the distribution of one of the proposed temporal coherence parameters and uses it to quantify the prevalence of nonstationarity in the dataset. The third study examines how temporal coherence varies with a range of atmospheric parameters to determine what conditions produce more non-stationarity.

Full Text

Duke Authors

Cited Authors

  • Rinker, JM; Gavin, HP; Clifton, A; Veers, PS; Kilcher, LF

Published Date

  • May 1, 2016

Published In

Volume / Issue

  • 159 / 2

Start / End Page

  • 373 - 389

Electronic International Standard Serial Number (EISSN)

  • 1573-1472

International Standard Serial Number (ISSN)

  • 0006-8314

Digital Object Identifier (DOI)

  • 10.1007/s10546-015-0121-x

Citation Source

  • Scopus