Revealing short-period normal modes of the atmosphere

Shved, G. M.; Ermolenko, S. I.; Hoffmann, Peter

doi:10.1134/s0001433815050126

Cited by 5 publications

(1 citation statement)

References 17 publications

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“…They also studied the vertical structure of the oscillation and showed that it was consistent with the expectation of a somewhat modified surface-trapped Lamb wave. Shved et al (2015) have recently tentatively identified a limited number of gravity modes with peaks in spectra of singlestation pressure records. FIG.…”

Section: Fig 1 Schematic Diagram Based Loosely Onmentioning

confidence: 99%

An Array of Ringing Global Free Modes Discovered in Tropical Surface Pressure Data

Sakazaki

Hamilton

2020

Journal of the Atmospheric Sciences

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We used newly available ERA5 hourly global data to examine the variations of atmospheric circulation on global scales and high frequencies. The space–time spectrum of surface pressure displays a typical red background spectrum but also a striking number of isolated peaks. Some peaks represent astronomically forced tides, but we show that most peaks are manifestations of the ringing of randomly excited global-scale resonant modes, reminiscent of the tones in a spectrum of a vibrating musical instrument. A few such modes have been tentatively identified in earlier observational investigations, but we demonstrate the existence of a large array of normal mode oscillations with periods as short as 2 h. This is a powerful and uniquely detailed confirmation of the predictions of the theory of global oscillations that has its roots in the work of Laplace two centuries ago. The delineation of the properties of the modes provides valuable diagnostic information about the atmospheric circulation. Notably the amplitudes and widths of the normal mode spectral peaks contain information on the forcing mechanisms and energy dissipation for the modes, and the simulation of these properties for each of the many modes we have identified can serve as tests for global climate and weather prediction models.

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Section: Fig 1 Schematic Diagram Based Loosely Onmentioning

confidence: 99%

An Array of Ringing Global Free Modes Discovered in Tropical Surface Pressure Data

Sakazaki

Hamilton

2020

Journal of the Atmospheric Sciences

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Probing signals of atmospheric gravity waves excited by the July 29, 2021 MW8.2 Alaska earthquake

Zhang,

Xu,

Chen

et al. 2024

Geodesy and Geodynamics

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Detecting atmospheric normal modes with periods less than 6 h by barometric observations

Ermolenko

Shved

Jacobi

2018

Journal of Atmospheric and Solar-Terrestrial Physics

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Revealing short-period normal modes of the atmosphere

Cited by 5 publications

References 17 publications

An Array of Ringing Global Free Modes Discovered in Tropical Surface Pressure Data

An Array of Ringing Global Free Modes Discovered in Tropical Surface Pressure Data

Probing signals of atmospheric gravity waves excited by the July 29, 2021 MW8.2 Alaska earthquake

Detecting atmospheric normal modes with periods less than 6 h by barometric observations

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Revealing short-period normal modes of the atmosphere

Cited by 5 publications

References 17 publications

An Array of Ringing Global Free Modes Discovered in Tropical Surface Pressure Data

An Array of Ringing Global Free Modes Discovered in Tropical Surface Pressure Data

Probing signals of atmospheric gravity waves excited by the July 29, 2021 MW8.2 Alaska earthquake

Detecting atmospheric normal modes with periods less than 6 h by barometric observations

Contact Info

Product

Resources

About

Detecting atmospheric normal modes with periods less than 6 h by barometric observations