Design and analysis of numerical experiments
- Univ. of Illinois, Urbana-Champaign (United States)
Calculations with numerical models are often referred to as numerical experiments, by analogy to classical laboratory experiments. Usually, many numerical experiments are carried out to determine the response of a numerical model to variations of internal or external parameters over some range of interest. If individual experiments are inexpensive to carry out, and if the number of independent parameters is small, it may be possible to search the entire parameter space of the model. This is difficult, however, if the dimension of the parameter space is even moderately large or the codes are expensive to run. In this paper methods are presented for the design and analysis of numerical experiments that are especially useful and efficient in multidimensional parameter spaces. The analysis method, which is similar to kriging in the spatial analysis literature, fits a statistical model to the output of the numerical model. As an example, the method is applied to a fully nonlinear, global, equivalent-barotropic dynamical model. The statistical model also provides estimates of the uncertainty of predicted numerical model output, which can provide guidance on where in the parameter space to conduct further experiments, if necessary. The method can provide major improvements in the efficiency with which numerical sensitivity experiments are conducted. 17 refs., 9 figs., 2 tabs.
- OSTI ID:
- 6433565
- Journal Information:
- Journal of the Atmospheric Sciences; (United States), Vol. 50:9; ISSN 0022-4928
- Country of Publication:
- United States
- Language:
- English
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99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
COMPUTER CALCULATIONS
DESIGN
METEOROLOGY
EXPERIMENT PLANNING
DATA COVARIANCES
FORECASTING
KRIGING
MANY-DIMENSIONAL CALCULATIONS
MATHEMATICAL MODELS
PARAMETRIC ANALYSIS
RECOMMENDATIONS
SENSITIVITY ANALYSIS
STATISTICAL MODELS
MATHEMATICS
PLANNING
STATISTICS
540110*
990200 - Mathematics & Computers