INVESTIGADORES
ALEXANDER Pedro Manfredo
congresos y reuniones científicas
Título:
LONG TERM STUDY OF GRAVITY WAVES PROPERTIES USING THE RADIO OCCULTATION TECHNIQUES
Autor/es:
LLAMEDO, P.; SCHMIDT, T.; DE LA TORRE, A.; FABER, A.; HIERRO, R.; ALEXANDER, P.; WICKERT, J.
Reunión:
Congreso; 7th International Workshop on Long term Changes and Trends in the Atmosphere; 2012
Resumen:
The Global
Positioning System Radio Occultation (GPS RO) technique provides high vertical resolution
profiles of refractivity from which other properties such as temperature and
water vapor can be derived. GPS RO is one well-established technique for
obtaining global gravity wave (GW) information from temperature profiles. Since
2001 several satellite missions have been providing an almost uniform global
coverage and all-weather capability allowing long term studies of
meteorological phenomena and in particular the gravity wave activity. The GWs
analysis is based on the proper extraction of the perturbation temperature. In
order to quantify the effect of small scale GWs alone, it is important to
separate them from the planetary waves. Different filtering techniques are
applied and the results are discussed. A climatological study over 10 years of
global observations of GW and their characteristics is done and possible trends
are discussed. A climatological study of the vertical wavelength (fv) the
specific potential energy (Ep) and an estimation vertical flux of horizontal
momentum (MF) is done and possible trends are discussed.