The intensive observing period number 2a (IOP2a) of the Mesoscale Alpine Programme (MAP Bougeault et al., 2001) took place on 17 September 1999 over the Lago Maggiore Area in northern Italy. Between 12 UTC and 00 UTC a convective line developed over the first slopes of the Lago Maggiore mountains and propagated south-eastwards. During the early night, the system intensified and produced 70 mm o...

[1] In this study, the midlatitude cloud fields produced by a climate (GISS) and a weather (ECMWF) model are evaluated against satellite observations. Monthly ensembles of model cloud property distributions for the four seasons are compared with similar ensembles from satellite retrievals. The weather model is run in both forecast and ‘‘climate’’ mode in order to evaluate the importance of the ...

Available rawinsonde, automatic weather station (AWS), ship, and synthesized long-term observations are used to evaluate the Antarctic numerical analyses of the European Centre for Medium-Range Weather Forecasts (ECMWF) and the U.S. National Centers for Environmental Prediction (NCEP) from 1985 to 1994. Twice-daily variations in the ECMWF surface pressure analyses compare closely with AWS units...

Article history: Received 28 April 2008 Received in revised form 2 October 2008 Accepted 3 December 2008 Latent heatflux in the South China Sea (SCS)mainly based on the Tropical RainMeasuringMission Microwave Imager (TMI) is comparedwith the Objectively Analyzed air-sea heat Fluxes (OAFlux), theGoddard Satellite-BasedSurface Turbulent Fluxes, version2 (GSSTF2), the JapaneseOcean Flux Data Sets ...

This paper presents the revision and evaluation of the interface between the convective parameterization by Emanuel and Živković-Rothman and the Lagrangian particle dispersion model “FLEXPART” based on meteorological data from the European Centre for Medium-Range Weather Forecasts (ECMWF). The convection scheme relies on the ECMWF grid-scale temperature and humidity and provides a matrix necess...

Editorial ECMWF regularly reviews the impact that various observing system data has on the forecast. A recent series of such observing system experiments are reported in the first article (page 2). In January 1997, there were severe floods in Greece due to torrential rainfalls over 12/13 J a n u a r y. The ECMWF forecast for that period is discussed on page 9. Three more reports in the ECMWF Te...