An extended verification technique for solving problems of numerical modeling of wind waves |
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| Authors: | V G Polnikov |
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| Institution: | 1.Obukhov Institute of Atmospheric Physics,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | Based on different modifications of the source function in the WAM(C4) wind-wave model, a large series of verification calculations
aimed at increasing the quality of the numerical model (with respect to the parameters of accuracy and performance) is performed.
We propose a methodology allowing us to solve the following fundamental and practical problems of numerical modeling: (1)
determining the minimum interval of verification of numerical wind-wave models, (2) finding a criterion for choosing the best
model out of all models subjected to verification, and (3) formulating the accuracy requirement for specifying the input field
necessary for the given accuracy of wind-wave field calculations. Particularly, we have found that (a) the minimum term of
verification calculations for numerical wind-wave models is three months; (b) according to our criterion, the proposed modification
of the WAM model impartially is “essentially preferable” to the original model; and (c) the relative errors (yielded by the
proposed version of the WAM model) in the calculated wave heights ρH
s
and average periods ρT
m
for different levels of the relative error of the input wind-wave field ρW make it possible to solve the third problem mentioned
above. |
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| Keywords: | |
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