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RISVerification of FGGE Assimilations of the Tropical Wind Field: The Effect of Model and Data Bias
Publisher: American Meteorological Society
Abstract: We examine the tropical wind field analyses produced by a recent assimilation of the Final FGGE II-b dataset. Our aim is to estimate the effects, on the tropical wind analyses, of biases in the data and biases in the ...
The Performance of a Medium-Range Forecast Model in Winter–Impact of Physical Parameterizations
Publisher: American Meteorological Society
Abstract: We present the results of a series of forecasts on seven weather situations from February 1976 using two models which differ only in their physical parameterizations. One set of parameterizations was developed at the ...
An Evaluation of the Performance of the ECMWF Operational System in Analyzing and Forecasting Easterly Wave Disturbances over Africa and the Tropical Atlantic
Publisher: American Meteorological Society
Abstract: Substantial changes were made to the ECMWF model in May 1985. The extensive revisions to the physical parameterizations were designed to improve the treatment of the large-scale flow in the tropics. In addition, the ...
Probabilistic Predictions of Precipitation Using the ECMWF Ensemble Prediction System
Publisher: American Meteorological Society
Abstract: The forecast skill of the European Centre for Medium-Range Weather Forecasts Ensemble Prediction System (EPS) in predicting precipitation probabilities is discussed. Four seasons are analyzed in detail using signal detection ...
Reply to Comments by Wilson and by Juras
Publisher: American Meteorological Society
Global Observing System Experiments on Operational Statistical Retrievals of Satellite Sounding Data
Publisher: American Meteorological Society
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 ...
Global Data Assimilation and Forecast Experiments Using the Improved Initialization Inversion Method for Satellite Soundings
Publisher: American Meteorological Society
Abstract: This is an evaluation of a retrieval, data assimilation, and forecast experiment on satellite sounding data from the NOAA-9 and NOAA-10 polar orbiting satellites during a 15.5 day period in January?February 1987. Retrievals ...
Quality Control of Operational Physical Retrievals of Satellite Sounding Data
Publisher: American Meteorological Society
Abstract: Earlier work identified serious errors and biases in the operational temperature and moisture satellite retrievals produced by statistical methods. We show that similar errors and biases are found in the physical retrievals ...
Monitoring of Observation and Analysis Quality by a Data Assimilation System
Publisher: American Meteorological Society
Abstract: The purpose of this paper is to demonstrate the ability of a modern data assimilation system to provide long-term diagnostic facilities to monitor the performance of the observational network. Operational data assimilation ...