Quasi 18 h wave activity in ground-based observed mesospheric H2O over Bern, Switzerland

dc.bibliographicCitation.firstPage14905
dc.bibliographicCitation.issue24
dc.bibliographicCitation.lastPage14917
dc.bibliographicCitation.volume17
dc.contributor.authorLainer, Martin
dc.contributor.authorHocke, Klemens
dc.contributor.authorRüfenacht, Rolf
dc.contributor.authorKämpfer, Niklaus
dc.date.accessioned2022-12-20T13:23:13Z
dc.date.available2022-12-20T13:23:13Z
dc.date.issued2017-12-18
dc.description.abstractObservations of oscillations in the abundance of middle-atmospheric trace gases can provide insight into the dynamics of the middle atmosphere. Long-term, high-temporal-resolution and continuous measurements of dynamical tracers within the strato- and mesosphere are rare but would facilitate better understanding of the impact of atmospheric waves on the middle atmosphere. Here we report on water vapor measurements from the ground-based microwave radiometer MIAWARA (MIddle Atmospheric WAter vapor RAdiometer) located close to Bern during two winter periods of 6 months from October to March. Oscillations with periods between 6 and 30 h are analyzed in the pressure range 0.02–2 hPa. Seven out of 12 months have the highest wave amplitudes between 15 and 21 h periods in the mesosphere above 0.1 hPa. The quasi 18 h wave signature in the water vapor tracer is studied in more detail by analyzing its temporal evolution in the mesosphere up to an altitude of 75 km. Eighteen-hour oscillations in midlatitude zonal wind observations from the microwave Doppler wind radiometer WIRA (WInd RAdiometer) could be identified within the pressure range 0.1–1 hPa during an ARISE (Atmospheric dynamics Research InfraStructure in Europe)-affiliated measurement campaign at the Observatoire de Haute-Provence (355 km from Bern) in France in 2013. The origin of the observed upper-mesospheric quasi 18 h oscillations is uncertain and could not be determined with our available data sets. Possible drivers could be low-frequency inertia-gravity waves or a nonlinear wave–wave interaction between the quasi 2-day wave and the diurnal tide.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/10681
dc.identifier.urihttp://dx.doi.org/10.34657/9717
dc.language.isoeng
dc.publisherKatlenburg-Lindau : EGU
dc.relation.doihttps://doi.org/10.5194/acp-17-14905-2017
dc.relation.essn1680-7324
dc.relation.ispartofseriesAtmospheric chemistry and physics 17 (2017), Nr. 24
dc.rights.licenseCC BY 3.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subjectatmospheric dynamicseng
dc.subjectatmospheric waveeng
dc.subjectmesosphereeng
dc.subjectradiometereng
dc.subjecttrace gaseng
dc.subjectwatereng
dc.subjectwater vaporeng
dc.subjectwave-wave interactioneng
dc.subjectBern [Switzerland]eng
dc.subjectSwitzerlandeng
dc.subject.ddc550
dc.titleQuasi 18 h wave activity in ground-based observed mesospheric H2O over Bern, Switzerlandeng
dc.typearticleeng
dc.typeTexteng
dcterms.bibliographicCitation.journalTitleAtmospheric chemistry and physics
tib.accessRightsopenAccesseng
wgl.contributorIAP
wgl.subjectGeowissenschaftenger
wgl.typeZeitschriftenartikelger
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