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首页> 外文期刊>Ocean Dynamics >Island-enhanced cooling mechanism in typhoon events revealed by field observations and numerical simulations for a coral reef area, Sekisei Lagoon, Japan
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Island-enhanced cooling mechanism in typhoon events revealed by field observations and numerical simulations for a coral reef area, Sekisei Lagoon, Japan

机译：通过实地观测和数值模拟揭示的台风事件中岛屿增强的冷却机制，对日本Sekisei泻湖的珊瑚礁区域进行了数值模拟

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摘要

While widely known for their destructive power, typhoon events can also bring benefit to coral reef ecosystems through typhoon-induced cooling which can mitigate against thermally stressful conditions causing coral bleaching. Sensor deployments in Sekisei Lagoon, Japan's largest coral reef area, during the summer months of 2013, 2014, and 2015 were able to capture local hydrodynamic features of numerous typhoon passages. In particular, typhoons 2015-13 and 2015-15 featured steep drops in near-bottom temperature of 5 A degrees C or more in the north and south sides of Sekisei Lagoon, respectively, indicating local cooling patterns which appeared to depend on the track and intensity of the passing typhoon. This was further investigated using Regional Ocean Modeling System (ROMS) numerical simulations conducted for the summer of 2015. The modeling results showed a cooling trend to the north of the Yaeyama Islands during the passage of typhoon 2015-13, and a cooling trend that moved clockwise from north to south of the islands during the passage of typhoon 2015-15. These local cooling events may have been initiated by the Yaeyama Islands acting as an obstacle to a strong typhoon-generated flow which was modulated and led to prominent cooling of waters on the leeward sides. These lower temperature waters from offshore may then be transported to the shallower inner parts of the lagoon area, which may partly be due to density-driven currents generated by the offshore-inner area temperature difference.
机译：台风事件虽然以其破坏力而广为人知，但也可通过台风诱发的冷却而使珊瑚礁生态系统受益，这可以减轻因热应力引起的珊瑚白化的情况。在2013年，2014年和2015年夏季，日本最大的珊瑚礁地区积成泻湖的传感器部署能够捕获许多台风通道的局部水动力特征。特别是2015-13和2015-15台风的特点是，积积泻湖北侧和南侧的近底温度分别下降了5 A摄氏度或更高，这表明局部冷却方式似乎取决于轨道和台风的强度。使用2015年夏季进行的区域海洋建模系统（ROMS）数值模拟对此进行了进一步研究。建模结果显示，在2015-13年台风过后，八重山群岛北部出现了降温趋势，并且该降温趋势逐渐改变。在2015-15台风通过期间，从群岛的北向南顺时针旋转。这些局部降温事件可能是由八重山群岛引发的，它是台风产生的强烈气流的障碍，这种气流被调节并导致背风侧的水明显冷却。来自海上的这些较低温度的水然后可以被输送到泻湖区域的较浅的内部，这可能部分是由于由海上-内部区域温度差产生的密度驱动的电流。

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  • 来源
    《Ocean Dynamics》 |2017年第11期|1369-1384|共16页
  • 作者

    Bernardo Lawrence Patrick C.; Nadaoka Kazuo; Nakamura Takashi; Watanabe Atsushi;

  • 作者单位

    Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Civil Engn, Meguro Ku, 2-12-1 O Okayama, Tokyo 1528552, Japan;

    Tokyo Inst Technol, Sch Environm & Soc, Dept Transdisciplinary Sci & Engn, Meguro Ku, 2-12-1 O Okayama, Tokyo 1528552, Japan;

    Tokyo Inst Technol, Sch Environm & Soc, Dept Transdisciplinary Sci & Engn, Meguro Ku, 2-12-1 O Okayama, Tokyo 1528552, Japan;

    Tokyo Inst Technol, Sch Environm & Soc, Dept Transdisciplinary Sci & Engn, Meguro Ku, 2-12-1 O Okayama, Tokyo 1528552, Japan;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Typhoon; Sekisei Lagoon; Temperature; Numerical model; Local cooling; Field measurements;

    机译：台风;关西泻湖;温度;数值模型;局部冷却;实地测量;

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