Comparison Study on Wind Input and Whitecapping Dissipation Expressions in Numerical Simulation of Typhoon-Generated Waves |
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| Authors: | GE Yi-jun ZHONG Zhong ZHANG Jin-shan and JIANG Xiao-ping |
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| Institution: | Institute of Meteorology, PLA University of Science and Technology;Institute of Meteorology, PLA University of Science and Technology;Nanjing Hydraulic Research Institute;Institute of Meteorology, PLA University of Science and Technology |
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| Abstract: | In order to investigate the effect of wind input and whitecapping dissipation on the simulation of typhoon-waves, three experiments are conducted with the latest version of SWAN (Simulating WAves Nearshore) model.The three experiments adopt the Komen, Janssens, and Westhuysen expressions for wind input and whitecappingdissipation, respectively. Besides the above-mentioned source terms, other parameterization schemes in these experiments are the same. It shows that the experiment with the Westhuysen expression result in the least simulationerrors while that with the Janssens expression has the most. The results from the experiments with Komen and Westhuysen expressions show that the differences in significant wave height (SWH) have good correlation with thedifferences in dissipation energy caused by whitecapping. This indicates that the whitecapping dissipation sourceterm plays an important role in the resultant differences of the simulated SWH between the two experiments. |
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| Keywords: | wind input whitecapping dissipation SWAN typhoon-generated waves |
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