Mean winds and momentum fluxes over Jicamarca, Peru, during june and august 1987

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dc.contributor.authorHitchman, M.
dc.contributor.authorFritts, D.
dc.contributor.authorCoy, L.
dc.contributor.authorKudeki, E.
dc.contributor.authorBywaters, K.
dc.contributor.authorSudan, R.
dc.coverage.spatialJicamarca
dc.coverage.spatialPerú
dc.date.accessioned2019-02-11T10:15:16Z
dc.date.available2019-02-11T10:15:16Z
dc.date.issued1992-02-20
dc.description.abstractData from the mesosphere-stratosphere-troposphere (MST) radar at Jicamarca, Peru, together with other available data, are used to diagnose the mean structure of winds and gravity-wave momentum fluxes from the surface to 90 km during two ten-day campaigns in June and August of 1987. In the stratosphere a layer of maximum eastward flow associated with the quasi-biennial oscillation (QBO) was seen to strengthen and descend rapidly from June to August, overlying persistent westward flow. A layer of enhanced signal return, suggestive of a turbulent layer, was observed just above the descending QBO eastward maximum. Notable zonal asymmetries were present during this transition and the local meridional circulation departed from zonal-mean QBO theory. A substantial northeastward momentum flux was found below 25 km, which may be related to topographic gravity waves excited by southeastward flow across the Andes. In the lower mesosphere a relatively weak “second” mesopause semiannual oscillation is confirmed. Gravity-wave zonal and meridional momentum fluxes usually opposed the flow, yielding body forces of 10–100 m s−1 day−1. In both the lower stratosphere and mesosphere, body forces were comparable in magnitude to inferred Coriolis torques.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationHitchman, M., Bywaters, K., Fritts, D., Coy, L., Kudeki, E., & Surucu, F. (1992). Mean winds and momentum fluxes over Jicamarca, Peru, during june and august 1987.==$Journal of the Atmospheric Sciences, 49$==(24), 2372-2383. https://doi.org/10.1175/1520-0469(1992)049<2372:MWAMFO>2.0.CO;2es_ES
dc.identifier.doihttps://doi.org/10.1175/1520-0469(1992)049<2372:MWAMFO>2.0.CO;2es_ES
dc.identifier.journalJournal of the Atmospheric Scienceses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/4070
dc.language.isoenges_ES
dc.publisherAmerican Meteorological Societyes_ES
dc.relation.ispartofurn:issn:0022-4928
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectMesospherees_ES
dc.subjectMomentum fluxes_ES
dc.subjectQuasi- biennial oscillationes_ES
dc.subjectStratospherees_ES
dc.subjectTropicses_ES
dc.subjectWindes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleMean winds and momentum fluxes over Jicamarca, Peru, during june and august 1987es_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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