scholarly journals Summer Precipitation Forecast Using Satellite Data and Numerical Weather Forecast Model Data

2012 ◽  
Vol 45 (7) ◽  
pp. 631-641 ◽  
Author(s):  
Gwang-Seob Kim ◽  
So-Hyun Cho
Keyword(s):  
Satellite Data ◽  
Summer Precipitation ◽  
Weather Forecast ◽  
Forecast Model ◽  
Precipitation Forecast ◽  
Model Data ◽  
Numerical Weather ◽  
Weather Forecast Model ◽  
Numerical Weather Forecast

scholarly journals Sensitivity of a long-range numerical weather forecast model to small changes of model parameters

2011 ◽  
Vol 6 (1) ◽  
pp. 13-18 ◽  
Author(s):  
M. B. Gavrilov ◽  
G. R. Jovanović ◽  
Z. Janjić
Keyword(s):  
Initial Conditions ◽  
Weather Forecast ◽  
Forecast Model ◽  
Model Parameters ◽  
Weather Forecasts ◽  
Numerical Weather ◽  
First Case ◽  
Weather Forecast Model ◽  
Model Setup ◽  
Numerical Weather Forecast

Abstract. Sensitivity of extended-range numerical weather forecasts to small changes of model parameters is studied for two cases. In the first case the Earth radius was perturbed. In the other case changes of the gravity were introduced. The results for the 500 hPa geopotential fields are presented on hemispheric maps and intercompared visually and using RMS differences of the perturbed and reference forecasts. During about the first 10 days of integration the results indicate modest sensitivity of the forecasts to the parameter variation. After this period the forecasts diverge rapidly and start to differ significantly. Repeated integrations on the same computer using the same model setup and the same initial conditions yield identical results.

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