INVESTIGADORES
MENENDEZ Claudio Guillermo
capítulos de libros
Título:
Are we observing mountain waves above the Andes Range from GPS occultation profiles?
Autor/es:
DE LA TORRE A., ALEXANDER P., MENÉNDEZ C.G.
Libro:
Atmosphere and Climate
Editorial:
Springer
Referencias:
Lugar: Berlin Heidelberg; Año: 2006; p. 243 - 252
Resumen:
Summary. GPS radio occultation temperature pro les retrieved from SAC-C and
CHAMP exhibit a signi cant wave activity in the troposphere and lower stratosphere
at midlatitudes (30-40S) above the Andes Range. Large amplitude structures,
with long vertical wavelength, have been repeatedly reported in this region,
as detected from other experimental devices and attributed to mountain waves.
The possibility to associate the observed enhancements in wave activity to mountain
forcing, or instead, to other signi cant sources in the region considered is
discussed. The generation in the vicinity to a permanent jet situated above the
montains of inertio gravity waves by geostrophic adjustment, with longer horizontal
and perhaps shorter vertical wavelengths than those expected from mountain
waves, seems to be the main source. These waves could be more easily detected from
GPS pro les than mountain waves. As it is known, inertio gravity waves are the
means by which mass and momentum are redistributed so as to ultimately achieve
geostrophic balance from an initially unbalanced state.GPS radio occultation temperature pro les retrieved from SAC-C and
CHAMP exhibit a signi cant wave activity in the troposphere and lower stratosphere
at midlatitudes (30-40S) above the Andes Range. Large amplitude structures,
with long vertical wavelength, have been repeatedly reported in this region,
as detected from other experimental devices and attributed to mountain waves.
The possibility to associate the observed enhancements in wave activity to mountain
forcing, or instead, to other signi cant sources in the region considered is
discussed. The generation in the vicinity to a permanent jet situated above the
montains of inertio gravity waves by geostrophic adjustment, with longer horizontal
and perhaps shorter vertical wavelengths than those expected from mountain
waves, seems to be the main source. These waves could be more easily detected from
GPS pro les than mountain waves. As it is known, inertio gravity waves are the
means by which mass and momentum are redistributed so as to ultimately achieve
geostrophic balance from an initially unbalanced state.