The GISS sounding temperature impact test

摘要: The impact of DST 5 and 6 satellite sounding data on mid-range forecasting was studied. GISS temperature technique, the time-continuous four-dimensional assimilation procedure based optimal statistical analysis, forecast model, verification techniques developed, including local precipitation forecasts are described. It is found that substantial beneficial for winter test period, Jan. 29 - Feb. 21. 1976. Forecasts started from initial state obtained with aid showed a mean improvement about 4 points in 48 772 hours Sub 1 scores as verified over North America Europe. This corresponds to an 8 12 hour range at hours. An automated model applied 128 cities United States average 15% when used numerical forecasts. 75% midwest.