论文标题
奇异性作为热带气旋中次生眼壁的诊断
Singularity as a diagnostic for secondary eyewall occurrence in tropical cyclones
论文作者
论文摘要
次要眼墙发生在70％的主要热带气旋（TC）中，并与风暴强度的快速变化和强风快速拓宽有关。虽然已经从各个角度研究了次级眼壁形成的机制，但TC中次生眼累的明确条件仍然蒙上了面纱，在TC强度预测中留下了很大的不确定性，尤其是对于最极端的事件。在这项研究中，我们以奇异性的形式提出了一种简单的诊断，用于TC中的继发性眼壁。诊断仅取决于三个基本风暴特征（最大风速，最大风的半径和纬度），并证明与卫星观测良好。它提供了一种有价值的工具，可以改善对次级眼睛风暴的理解，建模和风险评估。
Secondary eyewalls occur in 70% of major tropical cyclones (TCs), and are associated with rapid changes in storm intensity and rapid broadening of strong winds. While mechanisms of secondary eyewall formation have been investigated from various perspectives, the explicit conditions on which secondary eyewalls occur in TCs remain veiled, leaving substantial uncertainties in TC intensity forecast, especially for the most extreme events. In this study, we present a simple diagnostic, in form of a singularity, for secondary eyewall occurrence in TCs. The diagnostic is solely dependent on three basic storm characteristics (the maximum wind speed, the radius of maximum wind, and the latitude) and shown to compare well with satellite observations. It provides a valuable tool to improve the understanding, modeling and risk assessment of secondary eyewall storms.
