Global observing system experiments on operational statistical retrievals of satellite sounding data

Abstract

We report an observing system experiment on satellite sounding data during a 15.5-day period in January-February, 1987, using the operational European Centre for Medium Range Weather Forecasts (ECMWF) system as it was in late July 1988. The forecast results show a negative impact of the satellite sounding data (SATEM) in the Northern Hemisphere, and a strong positive impact in the Southern Hemisphere. The model and analysis developments implemented between July 1987 and July 1988 led to forecast improvements whether or not SATEM data were used. -from Authors