Artículo
Comparison of MLT Momentum Fluxes Over the Andes at Four Different Latitudinal Sectors Using Multistatic Radar Configurations
Conte, Juan Federico
; Chau, Jorge L.; Liu, Alan; Qiao, Zishun; Fritts, David C.; Hormaechea, José Luis
; Salvador, Jacobo Omar
; Milla, Marco A.
Fecha de publicación:
02/2022
Editorial:
John Wiley & Sons
Revista:
Journal of Geophysical Research: Atmospheres
ISSN:
2169-897X
e-ISSN:
2169-8996
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The middle atmosphere over South America, particularly above the Andes mountain range, is known as one of the most dynamically active regions in the world. Previous studies have investigated wave dynamics at mesosphere and lower thermosphere (MLT) altitudes within this region, but only a handful of them have made use of continuous measurements provided by specular meteor radars (SMRs). Furthermore, it was only until recently that MLT horizontal wind gradients were estimated for the first time using Spread Spectrum Interferometric Multistatic meteor radar Observing Network (SIMONe) Argentina, a multistatic SMR network located in southern Patagonia. By observing larger amounts of meteors from different viewing angles, multistatic SMRs allow, among others, for more reliable momentum flux estimates. In this work, we explore and compare the summer and winter MLT momentum flux dynamics at low and middle latitude sectors over the Andes mountain range. We also investigate the intermittency of the total momentum flux over these sectors. For this purpose, we analyze measurements provided by four multistatic SMR networks: SIMONe Peru (12°S), Chilean observation network de Meteor radars (30°S), SIMONe Argentina (49°S) and multi-frequency Agile radar for investigations of the atmosphere-southern Argentina agile meteor radar (54°S). We find that the momentum flux dynamics can change considerably over distances of only a few hundred km (e.g., southern Argentina). On the other hand, the contributions of large momentum fluxes to the total flux can be similar between regions separated by thousands of km (e.g., between Peru and southern Argentina).
Palabras clave:
GRAVITY WAVES
,
METEOR RADAR
,
MLT
,
MOMENTUM FLUX
,
SIMONE
,
WINDS
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Articulos(UNIDEF)
Articulos de UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICOS PARA LA DEFENSA
Articulos de UNIDAD DE INVESTIGACION Y DESARROLLO ESTRATEGICOS PARA LA DEFENSA
Citación
Conte, Juan Federico; Chau, Jorge L.; Liu, Alan; Qiao, Zishun; Fritts, David C.; et al.; Comparison of MLT Momentum Fluxes Over the Andes at Four Different Latitudinal Sectors Using Multistatic Radar Configurations; John Wiley & Sons; Journal of Geophysical Research: Atmospheres; 127; 4; 2-2022; 1-15
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