Spectral gap: Difference between revisions
From Glossary of Meteorology
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|Meaning=A [[wavenumber]], [[wavelength]], or [[frequency band]] within a Fourier [[energy spectrum]] that has a relative minimum of spectral [[energy]]. | |||
|Explanation=Much of the theoretical [[development]] of [[turbulence]] in the [[atmosphere]] is based on the assumption of a spectral gap between larger-wavelength motions (called mean motions) and small- scale motions (called turbulence). However, a growing body of experimental evidence indicates that there is often not a spectral gap in the [[atmospheric boundary layer]], thereby raising questions about the [[Reynolds averaging]] approach that has formed the basis for turbulence theory for the past century. | |||
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Latest revision as of 06:41, 30 March 2024
A wavenumber, wavelength, or frequency band within a Fourier energy spectrum that has a relative minimum of spectral energy.
Much of the theoretical development of turbulence in the atmosphere is based on the assumption of a spectral gap between larger-wavelength motions (called mean motions) and small- scale motions (called turbulence). However, a growing body of experimental evidence indicates that there is often not a spectral gap in the atmospheric boundary layer, thereby raising questions about the Reynolds averaging approach that has formed the basis for turbulence theory for the past century.
