Quantification of waves in lidar observations of noctilucent clouds at scales from seconds to minutes
dc.bibliographicCitation.firstPage | 11757 | eng |
dc.bibliographicCitation.issue | 23 | eng |
dc.bibliographicCitation.volume | 13 | eng |
dc.contributor.author | Kaifler, N. | |
dc.contributor.author | Baumgarten, G. | |
dc.contributor.author | Fiedler, J. | |
dc.date.accessioned | 2020-09-11T12:52:57Z | |
dc.date.available | 2020-09-11T12:52:57Z | |
dc.date.issued | 2013 | |
dc.description.abstract | We 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.version | publishedVersion | eng |
dc.identifier.uri | https://doi.org/10.34657/4267 | |
dc.identifier.uri | https://oa.tib.eu/renate/handle/123456789/5638 | |
dc.language.iso | eng | eng |
dc.publisher | Göttingen : Copernicus | eng |
dc.relation.doi | https://doi.org/10.5194/acp-13-11757-2013 | |
dc.relation.ispartofseries | Atmospheric Chemistry and Physics 13 (2013), 23 | eng |
dc.relation.issn | 1680-7316 | |
dc.rights.license | CC BY 3.0 Unported | eng |
dc.rights.uri | https://creativecommons.org/licenses/by/3.0/ | eng |
dc.subject | amplitude | eng |
dc.subject | brightness temperature | eng |
dc.subject | displacement | eng |
dc.subject | gravity wave | eng |
dc.subject | lidar | eng |
dc.subject | Mie theory | eng |
dc.subject | polar mesospheric cloud | eng |
dc.subject | Raman spectroscopy | eng |
dc.subject | Rayleigh wave | eng |
dc.subject | Norway | eng |
dc.subject.ddc | 550 | eng |
dc.title | Quantification of waves in lidar observations of noctilucent clouds at scales from seconds to minutes | eng |
dc.type | article | eng |
dc.type | Text | eng |
dcterms.bibliographicCitation.journalTitle | Atmospheric Chemistry and Physics | eng |
tib.accessRights | openAccess | eng |
wgl.contributor | AIP | eng |
wgl.subject | Geowissenschaften | eng |
wgl.type | Zeitschriftenartikel | eng |
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