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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43605

Title: Characteristics of the RAW Filtered Leapfrog Time-stepping Scheme in the Ocean General Circulation Model
Authors: Chih-Chieh Young;Yu-Chiao Liang;Yu-Heng Tseng;Chun-Hoe Chow
Contributors: 國立臺灣海洋大學:海洋環境資訊學系
Keywords: Numerical analysis/modeling;Ocean models
Date: 2014-01
Issue Date: 2017-10-19T02:11:55Z
Publisher: Monthly Weather Review
Abstract: Abstract:The Robert–Asselin–Williams (RAW) filtered leapfrog scheme is implemented and tested in the Taiwan multiscale community ocean model (TIMCOM). The characteristics of the RAW filter are carefully examined through two benchmark tests (the classical model problem-oscillation equation with further consideration of the dissipation effect, and the 1D linearized shallow-water equations). Particularly, the effect of the RAW filter upon the 2Δx wave instability due to spatial truncation errors is addressed. TIMCOM is then applied to simulate the coastally trapped internal Kelvin waves and global ocean circulations, showing the practical improvement over the Robert–Asselin (RA) filter in the short- and long-term model integrations. The large mean differences in some major current systems suggest the potential impacts on the oceanic instability where the numerical dissipation may interfere with the physical one. The characteristic analysis and model results here indicate the significant advantage of the RAW-filtered leapfrog time-stepping scheme for accurate ocean modeling.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/43605
Appears in Collections:[海洋環境資訊系] 期刊論文

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