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Impacts of Oceanic Preexisting Conditions on Predictions of Typhoon Hai-Tang in 2005

机译:大洋原有条件对2005年台风海棠预报的影响

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We investigated the impact of variations in oceanic preexisting conditions on predictions of Typhoon Hai-Tang (2005) by using a coupled atmosphere-ocean model with 6-km horizontal resolution and providing the oceanic initial conditions on 12 July from 1997 to 2005 to the model. Variations in oceanic preexisting conditions caused variation in predicted central pressure of nearly 18 hPa at 72 h, whereas sea-surface cooling (SSC) induced by Hai-Tang caused a predicted central pressure difference of about 40 hPa. Warm-core oceanic eddies up to a few hundred kilometers across and a deep mixed layer climatologically distributed in the western North Pacific led to high mixed-layer heat potential, which increased latent heat flux, water vapor, and liquid water contents around Hai-Tang's center. These increases were closely associated with Hai-Tang's intensification. SSC negatively affected the eyewall, whereas variations in oceanic preexisting conditions remarkably affected spiral rainbands and the magnitude of SSC.
机译:我们通过使用水平分辨率为6 km的大气-海洋耦合模型并提供1997年至2005年7月12日的海洋初始条件,研究了海洋原有条件的变化对台风海棠(2005)预报的影响。 。海洋既存条件的变化导致72 h时的预计中心压力变化接近18 hPa,而海棠引起的海面降温(SSC)导致了40 centralhPa的预计中心压力差。暖芯海洋涡流长达数百公里,北太平洋西部气候分布较深的混合层导致高混合层热势,这增加了海棠湾周围的潜热通量,水蒸气和液态水含量中央。这些增长与海棠的集约化紧密相关。 SSC对眼墙产生了负面影响,而海洋原有条件的变化显着影响了螺旋雨带和SSC的大小。

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