An analytical model of maximum potential intensity for tropical cyclones incorporating the effect of ocean mixing
An analytical model of maximum potential intensity for tropical cyclones incorporating the effect of ocean mixing
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DOI：
10.1002/2017gl073670
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发表时间：
2014-03
影响因子：
5.2
通讯作者：
Y. Miyamoto;G. Bryan;R. Rotunno
中科院分区：
文献类型：
--
作者：
Y. Miyamoto;G. Bryan;R. Rotunno
根据伊曼纽尔最大势强理论，建立了热带气旋(TCS)风致海洋冷却的最大势强分析模式。该模式由一维海洋和以恒定速度平移的轴对称TC涡旋组成。该模型通过考虑热带气旋的大小和形状，对以前的方法进行了改进。PI是通过使用指定的风廓线对海洋混合的影响进行径向积分而在最大风半径处确定的。与伊曼纽尔的原始PI相比，新的PI模式更好地捕捉到了观测到的TCS的最大强度。它还表明，冷却程度(即海洋对大气的反馈)可以用一个无量纲参数来量化，该参数表示大气强迫与海洋稳定性的比率。
An analytical model of maximum potential intensity (PI) for tropical cyclones (TCs) incorporating wind‐induced ocean cooling is developed on the basis of Emanuel's PI theory. The model consists of a one‐dimensional ocean and an axisymmetric TC vortex that is translating at a constant speed. The model advances upon previous approaches by accounting for TC size and shape. The PI is determined at the radius of maximum winds by radially integrating the effect of ocean mixing using a specified wind profile. The resulting analytic ocean cooling agrees well with numerical solutions, and the new PI model better captures maximum intensities of observed TCs compared with Emanuel's original PI. It is also shown that the degree of cooling (i.e., ocean's feedback to atmosphere) can be quantified by a dimensionless parameter, representing the ratio of atmospheric forcing to ocean stability.