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The impact of FGGE data coverage and improved numerical techniques in numerical weather prediction in the Australian region

✍ Scribed by L. M. Leslie; G. A. Mills; D. J. Gauntlett

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
789 KB
Volume
107
Category
Article
ISSN
0035-9009

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✦ Synopsis

Abstract

This paper describes the results from an extensive series of experiments aimed at enhancing the skill of the Australian Numerical Meteorology Research Centre (ANMRC) limited area analysis/forecast system.

Significant increases in model performance were achieved, in the sense of reducing S~1~, skill scores and in forecasting precipitation, in three ways: (1) improved data base since the beginning of FGGE; (2) the application of a more realistic lateral boundary specification, particularly nesting within a hemispheric forecast model; and (3) the reduction of truncation errors by either decreasing the grid spacing or (more efficiently) employing higher order difference operators.

The improvement in skill is sufficiently large to suggest that when implemented operationally the quality of routine prediction of synoptic scale patterns over the Australian region will be considerably improved.

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