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A coupled atmosphere-wave-ocean model is used to evaluate the effect of sea surface roughness on typhoon wind fields, observational studies about the sea surface roughness are parameterized in the coupled model. A series of numerical experiments is conducted for a typical typhoon case Rananim (No. 0414) to examine the effect of sea surface roughness on typhoon wind fields modeling. The numerical experimental results indicate that the increase of friction velocity and the decrease of the wind speed are obvious to the right of the storm track due to the sea surface roughness.