INVESTIGADORES
PULIDO Manuel Arturo
congresos y reuniones científicas
Título:
Constraints in the gravity wave drag using variational assimilation principles. A review
Autor/es:
PULIDO M AND H. TEITELBAUM
Lugar:
Toronto Canada
Reunión:
Workshop; Workshop SPARC; 2008
Institución organizadora:
SPARC, WCRP
Resumen:
A novel technique to estimate gravity wave drag from global scale analyses will be presented. It is based on the principles of four-dimensional variational data assimilation using a dynamical model of the middle atmosphere and its adjoint. The assimilation technique is used to estimate gravity wave drag from Met Office analyses for a one week period. The zonal mean drag estimates reach maximum amplitudes of $50 , mrm{ m , s^{-1} , day^{-1}}$ at $0.4 , mrm{hPa}$ near the winter hemisphere polar jet. Vertical variations in the sign and pattern of the estimated drag suggest filtering of the gravity wave spectrum by the background flow. The seasonal variations of one-year of gravity wave drag estimation will be presented and analysed.
