Artículo

Llamedo, P.; Salvador, J.; de la Torre, A.; Quiroga, J.; Alexander, P.; Hierro, R.; Schmidt, T.; Pazmiño, A.; Quel, E."11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America" (2019) Journal of Geophysical Research: Atmospheres. 124(2):451-467
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Abstract:

Gravity 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. ©2018. American Geophysical Union. All Rights Reserved.

Registro:

Documento: Artículo
Título:11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America
Autor:Llamedo, P.; Salvador, J.; de la Torre, A.; Quiroga, J.; Alexander, P.; Hierro, R.; Schmidt, T.; Pazmiño, A.; Quel, E.
Filiación:LIDTUA, CIC, Facultad de Ingeniería, Universidad Austral and CONICET, Buenos Aires, Argentina
Laser and Application Research Center (CEILAP)–UNIDEF (MINDEF-CONICET)Villa Martelli, Argentina
Facultad Regional Buenos Aires (UTN-FRBA), Universidad Tecnológica Nacional, Buenos Aires, Argentina
Universidad Nacional de la Patagonia Austral, Unidad Académica Río Gallegos, and CIT, Río Gallegos, Argentina
Instituto de Física de Buenos Aires, CONICET, Buenos Aires, Argentina
Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Potsdam, Germany
LATMOS, UVSQ University Paris Saclay, UPMC University Paris 06, CNRS, Guyancourt, France
Palabras clave:GPS RO; SABER; gravity waves activity; lidar; polar vortex; southen South America; stratosphere
Año:2019
Volumen:124
Número:2
Página de inicio:451
Página de fin:467
DOI: http://dx.doi.org/10.1029/2018JD028673
Handle:http://hdl.handle.net/20.500.12110/paper_2169897X_v124_n2_p451_Llamedo
Título revista:Journal of Geophysical Research: Atmospheres
Título revista abreviado:J. Geophys. Res. Atmos.
ISSN:2169897X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_2169897X_v124_n2_p451_Llamedo

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Citas:

---------- APA ----------
Llamedo, P., Salvador, J., de la Torre, A., Quiroga, J., Alexander, P., Hierro, R., Schmidt, T.,..., Quel, E. (2019) . 11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America. Journal of Geophysical Research: Atmospheres, 124(2), 451-467.
http://dx.doi.org/10.1029/2018JD028673
---------- CHICAGO ----------
Llamedo, P., Salvador, J., de la Torre, A., Quiroga, J., Alexander, P., Hierro, R., et al. "11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America" . Journal of Geophysical Research: Atmospheres 124, no. 2 (2019) : 451-467.
http://dx.doi.org/10.1029/2018JD028673
---------- MLA ----------
Llamedo, P., Salvador, J., de la Torre, A., Quiroga, J., Alexander, P., Hierro, R., et al. "11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America" . Journal of Geophysical Research: Atmospheres, vol. 124, no. 2, 2019, pp. 451-467.
http://dx.doi.org/10.1029/2018JD028673
---------- VANCOUVER ----------
Llamedo, P., Salvador, J., de la Torre, A., Quiroga, J., Alexander, P., Hierro, R., et al. 11 Years of Rayleigh Lidar Observations of Gravity Wave Activity Above the Southern Tip of South America. J. Geophys. Res. Atmos. 2019;124(2):451-467.
http://dx.doi.org/10.1029/2018JD028673