On the evaluation of the phase relation between temperature and wind tides based on ground-based measurements and reanalysis data in the middle atmosphere

dc.bibliographicCitation.firstPage581eng
dc.bibliographicCitation.issue4eng
dc.bibliographicCitation.journalTitleAnnales Geophysicaeeng
dc.bibliographicCitation.volume37eng
dc.contributor.authorBaumgarten, K.
dc.contributor.authorStober, G.
dc.date.accessioned2020-11-25T14:52:40Z
dc.date.available2020-11-25T14:52:40Z
dc.date.issued2019
dc.description.abstractThe variability in the middle atmosphere is driven by a variety of waves covering different spatial and temporal scales. We diagnose the variability in the thermal tides due to changes in the background wind by an adaptive spectral filter, which takes the intermittency of tides into account. We apply this diagnostic to temperature observations from daylight-capable lidar at midlatitudes (54° N, 12° E) as well as to reanalysis data of horizontal winds from Modern-Era Retrospective analysis for Research and Applications, Version 2 (MERRA-2). These reanalysis data provide additional wind information in the altitude range between 30 and 70 km at the location of the lidar as well as on a global scale. Using the global data gives information on the tidal modes seen at one location. A comparison of the temperature and wind information affirms whether there is a fixed phase relation of the tidal waves in the temperature and the wind data. We found that in general the local tidal signatures are dominated by migrating tidal modes, and the signature is weaker in temperatures than in winds. While the meridional wind tide leads the zonal wind tide by 90°, the phase relation between the temperature and the wind tide is more complex. At certain altitudes the temperature tide follows the zonal wind tide. This knowledge helps in improving the interpretation of the seasonal variation in tides from different observables, especially when only data from single locations are used. The findings provide additional information about the phase stability of tidal waves, and the results clearly show the importance of a measurement acquisition on a routine basis with high temporal and spatial resolution. © 2019 Author(s).eng
dc.description.fondsLeibniz_Fonds
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://doi.org/10.34657/4621
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/5992
dc.language.isoengeng
dc.publisherGöttingen : Copernicus GmbHeng
dc.relation.doihttps://doi.org/10.5194/angeo-37-581-2019
dc.relation.issn0992-7689
dc.rights.licenseCC BY 4.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/eng
dc.subject.ddc550eng
dc.subject.otherdata seteng
dc.subject.otherground-based measurementeng
dc.subject.otherlidareng
dc.subject.othermeridional circulationeng
dc.subject.otherspatiotemporal analysiseng
dc.subject.othertemperature effecteng
dc.subject.otherwind waveeng
dc.subject.otherzonal windeng
dc.titleOn the evaluation of the phase relation between temperature and wind tides based on ground-based measurements and reanalysis data in the middle atmosphereeng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccesseng
wgl.contributorIAPeng
wgl.subjectGeowissenschafteneng
wgl.typeZeitschriftenartikeleng
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