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首页> 外文期刊>Journal of oceanography >Numerical experiment on Kyucho around the Tango Peninsula induced by Typhoon 0406
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Numerical experiment on Kyucho around the Tango Peninsula induced by Typhoon 0406

机译：0406号台风诱发探戈半岛附近九尾的数值试验

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摘要

A numerical experiment using a three dimensional level model was performed to clarify the mechanism generating a strong coastal current, Kyucho, induced by the passage of Typhoon 0406 around the tip of the Tango Peninsula, Japan in June 2004. Wind stress accompanied by Typhoon 0406 was applied to the model ocean with realistic bottom topography and stratification condition. The model well reproduced the characteristics of Kyucho observed by Kumaki et al. (2005), i.e., the strong alongshore current with maximum velocity of 53 cm s?1 and its propagation along the peninsula with propagation speed of about 0.6 m s?1 one half-day after the typhoon’s passage. Coastal-trapped waves (CTW) accompanied by downwelling were induced along the northwest coast of the peninsula by the alongshore wind stress. The energy density flux due to the CTW flowed eastward along the coast, and indicated scattering of the CTW around the eastern coast of the peninsula. In addition, significant near-inertial internal gravity waves were also caused in the offshore region from the west of the Noto Peninsula to the north of the Tango Peninsula by the typhoon’s passage. The energy flux density of the near-inertial fluctuations flowed southward off the Fukui coast, and part of the energy flux was trapped on the tip of the Tango Peninsula, flowing with the coast on its right. It was found that the strong current, Kyucho, at the northeastern tip of the Tango Peninsula was generated by superposition of the near-inertial internal gravity waves and subinertial CTW.
机译：进行了使用三维水平模型的数值实验，以阐明2004年6月在日本探戈半岛顶端绕过台风0406时产生强烈的沿海水流九州的机制。应用于具有逼真的底部地形和分层条件的模型海洋。该模型很好地再现了Kumaki等人观察到的九重町特性。 （2005年），即强风沿海岸带，最大速度为53 cm s？1，并在台风通过后半天沿半岛传播，传播速度约为0.6 m s？1。沿海岸的风应力在半岛西北海岸诱发了伴随下沉的沿海陷波（CTW）。 CTW引起的能量密度通量沿海岸向东流动，表明CTW在半岛东海岸附近散布。此外，由于台风的影响，在从诺托半岛以西到探戈半岛以北的近海区域，还产生了很大的近惯性内部重力波。近惯性涨落的能量通量密度从福井海岸向南流动，一部分能量通量被困在探戈半岛的尖端，并在其右侧沿海岸流动。研究发现，探戈半岛东北端的强流九州是近惯性内部重力波与惯性CTW叠加产生的。

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