Accession Number:

ADA199374

Title:

Performance Comparisons for Two Versions of the Staniforth-Mitchell Barotropic Numerical Weather Prediction Code

Descriptive Note:

Interim rept. 1 Oct-31 Dec 1987

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

• Newton, R. E.
• Schoenstadt, A. L.

Report Date:

1988-07-26

Pagination or Media Count:

8.0

Abstract:

In a previous report, R. E. Newton proposed two improvements to the Staniforth-Mitchell barotropic numerical weather prediction code. Reported here are results of performance comparisons between the original code and an amended version which incorporates the two improvements a new solution routine for the eigenproblems and a direct solution of the Helmholtz equation. It is found that the proposed improvements do reduce the computation time, but that the new eigenproblem algorithm results in excessive round-off error when single- precision arithmetic is used.

Descriptors:

• *MATHEMATICAL MODELS
• *WEATHER FORECASTING
• COMPUTATIONS
• DIFFERENTIAL EQUATIONS
• COMPARISON
• TIME
• COMPUTERIZED SIMULATION
• ALGORITHMS
• PERFORMANCE(ENGINEERING)

Subject Categories:

• Meteorology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE