Impacts of oceanic preexisting conditions on predictions of Typhoon Hai-Tang in 2005
Impacts of oceanic preexisting conditions on predictions of Typhoon Hai-Tang in 2005
复制标题
海洋先存条件对2005年台风海棠预报的影响
DOI：
10.1155/2010/756071
复制
发表时间：
2010
影响因子：
2.9
通讯作者：
A. and N. Usui
中科院分区：
文献类型：
--
作者：
Wada;A. and N. Usui
利用一个水平分辨率为6 km的海气耦合模式，并将1997 - 2005年7月12日的初始海洋条件输入模式，研究了海洋条件的变化对台风海棠（2005）预报的影响。海洋预先存在的条件的变化导致预测的中心压力在72小时内变化近18 hPa，而海棠引起的海面冷却（SSC）导致预测的中心压力差约为40 hPa。在北太平洋西部气候上分布的数百公里宽的暖心海洋涡旋和深层混合层导致了高混合层热势，增加了海棠中心周围的潜热通量、水汽和液态水含量。这些增长与海棠的强化密切相关。SSC的负面影响的眼壁，而海洋预先存在的条件的变化显着影响螺旋雨带和SSC的大小。
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.