This study investigates the propagation and principal resonance characteristics of meteorological tsunamis (i.e., meteotsunamis) along the eastern Yellow Sea coast, which were anomalously strong in multiple harbors on April 25–26, 2008. Meteorological and sea level data were used to examine the link between atmospheric disturbances and meteotsunamis, and meteorological images were collected to estimate the propagation of atmospheric disturbances. Significant tsunami-like sea level oscillations were sequentially detected at the harbor tide gauges with increased spectral energy within broad period bands of less than 30 min, containing the fundamental period of each harbor. Meteorological parameters indicating the passage of a squall line, such as air pressure disturbances, wind disturbances, high rain rates, and lightning strikes, were also observed. The long ocean waves forced by the propagating squall line generated internal resonances, causing local amplification in multiple harbors. It appears that meteotsunami-induced harbor seiches were generated. Our results demonstrated that the pressure-forced meteotsunamis propagated toward the entrance of the harbors located on the propagation path, resulting in additional amplification by harbor resonance after the Proudman resonance amplifying the long waves in the open sea. The resonance characteristics favorable to additional amplification are the propagation of intense air pressure disturbances, harbors with large quality factors, and dominant period bands of the incoming long waves. The proposed resonance characteristics of specific sites can help in improving the accuracy of the current meteotsunami monitoring system in the Yellow Sea.

本研究调查了 2008 年 4 月 25 日至 26 日在多个港口异常强烈的黄海东部沿海气象海啸（即，meteotsunamis）的传播和主要共振特征。气象和海平面数据用于检查这种联系大气扰动和meteotsunamis之间，收集气象图像以估计大气扰动的传播。在港口潮汐仪上相继检测到明显的海啸般的海平面振荡，在小于 30 分钟的宽周期带内增加了光谱能量，其中包含每个港口的基本周期。还观察到指示飑线通过的气象参数，例如气压扰动、风扰动、高降雨率和雷击。由传播的飑线推动的长海浪产生内部共振，导致多个港口的局部放大。看来是由meteotsunami 引起的海港事件产生了。我们的结果表明，压力强迫的meteotsunamis向位于传播路径上的港口的入口传播，导致在Proudman共振放大公海长波之后港口共振的额外放大。有利于附加放大的共振特征是强烈的气压扰动的传播、具有大质量因子的港口以及进入的长波的主导周期带。提出的特定地点的共振特性有助于提高黄海现有气象海啸监测系统的准确性。