Internal inertia-gravity waves in the tropical lower stratosphere observed by the Arecibo Radar

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dc.contributor.authorMaekawa, Yasuyuki
dc.contributor.authorFukao, Schoichiro
dc.contributor.authorSato, Toru
dc.contributor.authorKato, Susumu
dc.contributor.authorWoodman Pollitt, Ronald Francisco
dc.date.accessioned2016-10-25T15:48:10Z
dc.date.accessioned2017-12-21T19:41:40Z
dc.date.available2016-10-25T15:48:10Z
dc.date.available2017-12-21T19:41:40Z
dc.date.issued1984-08-01
dc.description.abstractHigh-resolution upper tropospheric and lower stratospheric (5-30 km) wind data were obtained during three periods from 1979 to 1981 with the aid ofthe high-power UHF radar at Arecibo, Puerto Rico (18.4°N, 66.8°W). A quasi-periodic wind oscillation with ai;t apparent period of 20-50 h was observed between 16 and 20 km in every experiment.The amplitude of both zonal and meridional wind components was ~2 m s-1, and the vertical wavelength ~2 km. The direction of the wind associated with this oscillation rotated clockwise with time, as seen for inertia-gravity waves in the Northern Hemisphere. The wave disappeared near 20 km where the mean zonal flow had easterly shear with height. This phenomenon is discussed in terms of wave absorption at a critical leve!. lt is suggested that the wave had a westward horizontal phase speed of 10-20 m s-1. The intrinsic period and the horizontal wavelength at the wave-generated height are, inferred to be 20-30 h and ~2000 km, respectively, from the relationship based on f plan e theory that the Doppler-shifted wave frequency approaches the Coriolis frequency at the critical level. The vertical group velocity estimated from the dispersion equation on the fplane closely agrees with the ascending rate of the observed wave packets at each height. In addition, each observation showed the presence of another type of oscillation with somewhat longer vertical wavelength in the lower stratosphere. If we assume the same intrinsic period and horizontal scale for this oscillation as for the abovementioned smaller vertical-scalé wave at the tropopause level, the observed period and vertical structure are well described in terms o( an internal inertia-gravity wave propagating to the opposite side in the horizontal plane.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationMaekawa, Y., Fukao, S., Sato, T., Kato, S., & Woodman, R. F. (1984). Internal inertia-gravity waves in the tropical lower stratosphere observed by the Arecibo Radar.==$Journal of the Atmospheric Sciences, 41$==(15), 2359-2367. https://doi.org/10.1175/1520-0469(1984)041<2359:IIWITT>2.0.CO;2es_ES
dc.identifier.doihttps://doi.org/10.1175/1520-0469(1984)041<2359:IIWITT>2.0.CO;2es_ES
dc.identifier.journalJournal of the Atmospheric Scienceses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/517
dc.language.isoenges_ES
dc.publisherAmerican Meteorological Societyes_ES
dc.relation.ispartofurn:issn:0739-0572
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectAtmospheric movementses_ES
dc.subjectWeather radares_ES
dc.subjectGravity waveses_ES
dc.subjectStratospherees_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleInternal inertia-gravity waves in the tropical lower stratosphere observed by the Arecibo Radares_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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