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The effect of wave-induced radiation stress on storm surge during Typhoon Saomai (2006) |
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| Authors: | FENG Xingru YIN Baoshu YANG Dezhou and WILLIAM Perrie |
| Institution: | 1. Institute of Oceanology, China Academy of Sciences, Qingdao 266071, China;Graduate School, Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Ocean Circulation and Wave, Chinese Academy of Sciences, Qingdao 266071, China 2. Institute of Oceanology, China Academy of Sciences, Qingdao 266071, China;Key Laboratory of Ocean Circulation and Wave, Chinese Academy of Sciences, Qingdao 266071, China 3. Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada |
| Abstract: | The effects of wave-induced radiation stress on storm surge were simulated during Typhoon Saomai using a wave-current coupled model based on ROMS (Regional Ocean Modeling System) ocean model and SWAN (Simulating Waves Nearshore) wave model. The results show that radiation stress can cause both set-up and set-down in the storm surge. Wave-induced set-up near the coast can be explained by decreasing significant wave heights as the waves propagate shoreward in an approximately uniform direction; wave-induced set-down far from the coast can be explained by the waves propagating in an approximately uniform direction with increasing significant wave heights. The shoreward radiation stress is the essential reason for the wave-induced set-up along the coast. The occurrence of set-down can be also explained by the divergence of the radiation stress. The maximum wave-induced set-up occurs on the right side of the Typhoon path, whereas the maximum wave induced set-down occurs on the left side. |
| Keywords: | radiation stress storm surge wave-current interactions Typhoon Saomai |
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