Influence of the mean wind field on the separability of atmospheric perturbation spectra

C. S. Gardner, C. A. Hostetler, S. Lintelman

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of Doppler shifting caused by the mean wind field on the separability of gravity wave spectra are analyzed using the gravity wave models. If the intrinsic joint vertical wave number (m) and temporal frequency (ω) spectrum is separable. Doppler effects associated with even small mean winds will destroy separability of the observed joint (m, ωo) spectrum, particularly at high vertical wave-numbers. The effect can have a substantial impact on the measured m-spectrum especially when the observations are not sensitive to the lowest or highest observed frequencies. Data averaging or low-pass temporal filtering can result in substantial reduction of the spectrum magnitude at high m values while data prewhitening of high-pass temporal filtering can result in significant distortion of the spectrum at low m values. -from Authors

Original languageEnglish (US)
Pages (from-to)8859-8872
Number of pages14
JournalJournal of Geophysical Research
Volume98
Issue numberD5
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

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