Gravity waves resolved in ECMWF and measured by SABER

Details Gravity waves resolved in ECMWF and measured by SABER Gravity waves resolved in ECMWF and measured by SABER

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3610805s&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 10, CiteID L10805

Computer Science

Sound

7

Atmospheric Composition And Structure: Planetary Atmospheres (5210, 5405, 5704), Atmospheric Composition And Structure: Pressure, Density, And Temperature, Atmospheric Composition And Structure: Middle Atmosphere: Energy Deposition (3334)

Scientific paper

The limited resolution of most general circulation models (GCMs) is not sufficient to simulate gravity waves (GWs) explicitly. ECMWF (European Center for Medium-Range Weather Forecasts) data have now a horizontal resolution of ${1}/{4°, so parts of the mesoscale GWs can be resolved although most source processes still contain sub-grid phenomena. We validate the GWs resolved in ECMWF by comparison with corresponding results obtained from global SABER (Sounding of the Atmosphere Using Broadband Emission Radiometry) satellite observations. For this comparison, effects of the radiative transfer and satellite retrieval procedure are accounted for. Globally, GWs can be attributed to various GW sources and the GW spectrum is modulated by the background winds. Correlation analysis comparing SABER and ECMWF temperature fluctuations indicate good agreement with respect to mountain waves, for example, over the southern tip of south America or over Scandinavia, as well as GWs at the edge of the winter polar vortex.

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