Quantifying errors in model chemical forecasts during TRACE-P I Quantifying errors in model chemical forecasts during TRACE-P I. Bey Swiss Federal Institute of Technology D. J. Jacob, R. M. Yantosca, H. Liu Harvard University G. W. Sachse NASA LaRC
GEOS-CHEM CHEMICAL FORECASTING IN TRACE-P 5-day GEOS-3 forecast fields from DAO (2ox2.5o, 2x/day) and daily assimilated fields (1ox1o) were used to drive off-line CO simulation 0Z: start of forecast 14Z: forecast available from DAO DAY -1 0 1 2 16Z: GEOS-CHEM forecast product sent to TRACE-P team GEOS-CHEM update of CO initial condions using assimilated GEOS fields GEOS-CHEM forecast
SUCCESS OF FORECAST AND ASSIMILATED GEOS FIELDS IN REPRODUCING VARIANCE OF OBSERVED CO DURING TRACE-P Forecast Assimilation
SMEARING AND DISPLACEMENT ERRORS IN GEOS-CHEM FORECASTS DURING TRACE-P R2 statistics for forecasts vs. observations DISPLACEMENT ERROR SMEARING ERROR downward displacement upward displacement Increasing vertical smearing Forecast altitude