Quantification of waves in lidar observations of noctilucent clouds at scales from seconds to minutes

dc.bibliographicCitation.firstPage11757eng
dc.bibliographicCitation.issue23eng
dc.bibliographicCitation.journalTitleAtmospheric Chemistry and Physicseng
dc.bibliographicCitation.volume13eng
dc.contributor.authorKaifler, N.
dc.contributor.authorBaumgarten, G.
dc.contributor.authorFiedler, J.
dc.date.accessioned2020-09-11T12:52:57Z
dc.date.available2020-09-11T12:52:57Z
dc.date.issued2013
dc.description.abstractWe present small-scale structures and waves observed in noctilucent clouds (NLC) by lidar at an unprecedented temporal resolution of 30 s or less. The measurements were taken with the Rayleigh/Mie/Raman lidar at the ALOMAR observatory in northern Norway (69 N) in the years 2008-2011. We find multiple layer NLC in 7.9% of the time for a brightness threshold of δ β 12 × 10-10 m-1 sr-1. In comparison to 10 min averaged data, the 30 s dataset shows considerably more structure. For limited periods, quasi-monochromatic waves in NLC altitude variations are common, in accord with ground-based NLC imagery. For the combined dataset, on the other hand, we do not find preferred periods but rather significant periods at all timescales observed (1 min to 1 h). Typical wave amplitudes in the layer vertical displacements are 0.2 km with maximum amplitudes up to 2.3 km. Average spectral slopes of temporal altitude and brightness variations are-2.01 ± 0.25 for centroid altitude,-1.41 ± 0.24 for peak brightness and-1.73 ± 0.25 for integrated brightness. Evaluating a new single-pulse detection system, we observe altitude variations of 70 s period and spectral slopes down to a scale of 10 s. We evaluate the suitability of NLC parameters as tracers for gravity waves.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://doi.org/10.34657/4267
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/5638
dc.language.isoengeng
dc.publisherGöttingen : Copernicuseng
dc.relation.doihttps://doi.org/10.5194/acp-13-11757-2013
dc.relation.issn1680-7316
dc.rights.licenseCC BY 3.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/eng
dc.subject.ddc550eng
dc.subject.otheramplitudeeng
dc.subject.otherbrightness temperatureeng
dc.subject.otherdisplacementeng
dc.subject.othergravity waveeng
dc.subject.otherlidareng
dc.subject.otherMie theoryeng
dc.subject.otherpolar mesospheric cloudeng
dc.subject.otherRaman spectroscopyeng
dc.subject.otherRayleigh waveeng
dc.subject.otherNorwayeng
dc.titleQuantification of waves in lidar observations of noctilucent clouds at scales from seconds to minuteseng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccesseng
wgl.contributorAIPeng
wgl.subjectGeowissenschafteneng
wgl.typeZeitschriftenartikeleng
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