11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America

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cic.institucionOrigenLaboratorio de Investigación, Desarrollo y Transferencia
cic.isFulltextSI
cic.isPeerReviewedtrue
cic.lugarDesarrolloGerman Research Centre for Geosciences
cic.lugarDesarrolloConsejo Nacional de Investigaciones Científicas y Técnicas
cic.lugarDesarrolloUniversity Paris Saclay
cic.parentTypeArtículo
cic.versionPublicada
dc.date.accessioned2023-05-10T17:22:56Z
dc.date.available2023-05-10T17:22:56Z
dc.identifier.urihttps://digital.cic.gba.gob.ar/handle/11746/11835
dc.title11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South Americaen
dc.typeArtículo
dcterms.abstractGravity wave (GW) activity is analyzed using temperature (T) data retrieved from a Rayleigh light detection and ranging (lidar) at Río Gallegos, Argentina (51.6°S, 69.3°W). GW characteristics are derived from 302 nights of observations providing more than 1,018 hr of high-resolution lidar data between 20- and 56-km height from August 2005 to December 2015. T measurements are performed by a Differential Absorption Lidar instrument. This lidar was the southernmost outside Antarctica until the end of 2017. Río Gallegos is an exceptional place to observe large amplitude GW. Every lidar measurement is classified according to its relative position to the polar vortex. The lidar measurements are compared with collocated Sounding of the Atmosphere using Broadband Emission Radiometry and Global Positioning System-Radio Occultation data. The different instruments show different windows of the GW spectrum, providing complementary observations. In general, the geometric mean of the specific GW potential energy (PE) is larger during winter and spring than during summer and autumn. The largest geometric mean of PE is found inside the vortex and decreases monotonically at its edge, outside it and when there is no vortex. The same behavior is observed with satellite data. On average, it can be seen that lidar observations provide larger PE values than limb sounding measurements. From a Morlet continuous wavelet transform analysis, three distinct modes are captured from Sounding of the Atmosphere using Broadband Emission Radiometry and from Global Positioning System-Radio Occultation data at the upper and lower stratosphere, respectively. In particular, a systematic 3.5- to 4-year oscillation, possibly related to El Niño–Southern Oscillation is observed.en
dcterms.creator.authorLlamedo, Pablo
dcterms.creator.authorSalvador, J.
dcterms.creator.authorde la Torre, Alejandro
dcterms.creator.authorQuiroga, J.
dcterms.creator.authorAlexander, P.
dcterms.creator.authorHierro, Rodrigo
dcterms.creator.authorSchmidt, T.
dcterms.creator.authorPazmiño, A.
dcterms.creator.authorQuel, E.
dcterms.identifier.otherDOI: 10.1029/2018JD028673
dcterms.identifier.otherISSN: 2169-8996
dcterms.isPartOf.issuevol. 124, no. 2
dcterms.isPartOf.seriesJGR: Atmospheres
dcterms.issued2019
dcterms.languageInglés
dcterms.licenseAttribution-NonCommercial-ShareAlike 4.0 International (BY-NC-SA 4.0)
dcterms.subjectLidaren
dcterms.subjectGravity waves activityen
dcterms.subjectPolar vortexen
dcterms.subjectGPS RO; SABERen
dcterms.subjectSouthen South Americaen
dcterms.subjectStratosphereen
dcterms.subject.materiaMeteorología y Ciencias Atmosféricas

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