INVESTIGADORES
DE LA TORRE Alejandro
artículos
Título:
Global gravity wave activity in the tropopause region from CHAMP radio occultation data
Autor/es:
SCHMIDT T., A. DE LA TORRE, J. WICKERT
Revista:
GEOPHYSICAL RESEARCH LETTERS
Editorial:
AGU
Referencias:
Lugar: Washington; Año: 2008 vol. 35 p. 1 - 4
ISSN:
0094-8276
Resumen:
We discuss the global gravity wave (GW) activity
expressed by the specific potential energy in the altitude
range from 5 km below to 10 km above the tropopause,
derived from GPS radio occultation data from CHAMP
(20012008). The GW analysis is based on vertical
detrending of the individual measured temperature profiles
by applying a Gaussian filter in two different ways:
(i) filtering of the complete temperature profiles and
(ii) separate filtering of the profiles for the tropospheric
and lower stratospheric parts. The separate filtering method
significantly reduces the usually observed wave activity
enhancement in the tropopause region which highly
depends on the performance of the complete filtering
method to reproduce the change in the temperature gradient
at the tropopause. We only consider vertical wavelengths
less than 10 km. The global mean potential energy in the
tropopause region deduced with these different background
temperatures will be analyzed, differences will be
emphasized and possible error sources of the new method
will be considered.
vol 35, L16807, doi:10.1029/2008GL034986