A numerical ocean wave model for the southwest Pacific
作者:
A. K. Laing,
期刊:
New Zealand Journal of Marine and Freshwater Research
(Taylor Available online 1983)
卷期:
Volume 17,
issue 1
页码: 83-98
ISSN:0028-8330
年代: 1983
DOI:10.1080/00288330.1983.9515989
出版商: Taylor & Francis Group
关键词: water waves;wave forecasting;Southwest Pacific;wind waves;physical oceanography;mathematical models;spectrum analysis
数据来源: Taylor
摘要:
A computer‐based model for forecasting ocean waves in the Southwest Pacific is described. The grid, which represents the sea surface for this model, covers a section of that used in the operational atmospheric analysis and prediction models of the New Zealand Meteorological Service. At each grid point a discrete directional power spectrum is defined. Each component represents an energy density (in frequency and direction) and is treated independently of the others. Propagation of wave energy is effected by a Lax‐Wendroff‐type finite differencing scheme with appropriate modifications near coastlines and grid boundaries. Wave generation and dissipation are calculated using an empirically derived exponential formula. Some examples of results are presented and the hindcasts for selected weather events are discussed. Comparisons between results and visual observations of significant wave height are not very promising but much of the discrepency can be attributed to the scatter of the latter. Some comparisons at the ‘Maui‐A’ site between results from the model and measurements from a waverider buoy show reasonable correlation between significant wave height records. However, this site poses particular problems which are beyond the scope of this type of model.
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