论文标题
超级旋风分裂：一个动态案例研究
Super Cyclone Amphan: A Dynamical Case Study
论文作者
论文摘要
21年后，在孟加拉湾的超级旋风旋风中的旋风轴是从旋风风暴（CAT 1）加剧到不到36小时的超级旋风（CAT 5）。它继续使西孟加拉邦的登陆是一场非常严重的气旋风暴（VSC），风速接近155 kmph。在这里，我们分析了导致其快速加强的动力学，因为该系统最初仍在努力发展，尽管海湾中存在高海面温度（SST）等成熟条件。我们的分析清楚地表明，对流层上层的对流耦合开尔文波（CCKW）可能在对流层层层层中引发了强大的不稳定性，然后垂直向下传播并与表面障碍相互作用，以促进与Madden Julian Julian振荡（MJO）相互作用。这种对流耦合导致了一阵西风，并增强了垂直混合和水分收敛性，最终导致了超级气旋Amphan的形成和增强。
Cyclone Amphan, a super cyclone in the Bay of Bengal after 21 years, intensified from a cyclonic storm (CAT 1) to a super cyclone (CAT 5) in less than 36 hours. It went on to make landfall over West Bengal as a Very Severe Cyclonic Storm (VSCS) with winds close to 155 kmph. Here, we analyze the dynamics that led to its rapid intensification, given that the system struggled to develop initially despite the presence of ripe conditions like high Sea Surface Temperature (SST) in the Bay. Our analysis clearly reveals that a Convectively Coupled Kelvin Wave (CCKW) from upper troposphere might have initiated strong instabilities in the tropopause, which then propagated vertically downward and interacted with surface disturbances to promote convective coupling with the Madden Julian Oscillations (MJO). Such convective coupling resulted in a burst of westerly winds along with enhanced vertical mixing and moisture convergence, which eventually led to the formation and intensification of super cyclone, Amphan.
