Gravity waves in Fabry–Perot measurements made at Mt. John (44°S,170°E), New Zealand

Observations of winds in mesospheric airglow layers have been made at Mt. John (44°S,170°E), New Zealand for some years. We present a modelling study of airglow emissions which shows that the properties of wind detection based on airglow emission means that high-frequency gravity waves are effective...

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Bibliographic Details
Published inJournal of atmospheric and solar-terrestrial physics Vol. 64; no. 3; pp. 367 - 376
Main Authors Plagmann, Manfred, Lawrence, Bryan N, Fraser, Grahame
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.02.2002
Subjects
Airglow
Fabry–Perot
Gravity waves
Mesosphere
New Zealand
Fabry–Perot
Mesosphere
Gravity waves
Airglow
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Summary:Observations of winds in mesospheric airglow layers have been made at Mt. John (44°S,170°E), New Zealand for some years. We present a modelling study of airglow emissions which shows that the properties of wind detection based on airglow emission means that high-frequency gravity waves are effectively filtered from the wind spectrum observed. This filtering means that any waves with periods of the order of hours should be detectable in the record (as they will not be hidden in the noise of the higher-frequency waves ubiquitous at these heights). One example of such a wave is shown. As part of the analysis, we show that because the airglow layers differ in width, some waves might be observed in only one airglow layer, even when present in both.
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ISSN:1364-6826
1879-1824
DOI:10.1016/S1364-6826(01)00110-9