摘要
本文对1979年1月和4月发生于西北太平洋地区的两个爆发性气旋和一个非爆发性气旋，应用位势涡度和E－P通量等进行了诊断分析。分析揭示，爆发性气旋发生与发展，不同于普通气旋的动力机制，它是由于平流层底的涡度异常增大南侵和下族对对流层扰动、上层冷空气下传形成的上下偶合垂直结构的发展性气旋。其动力主要来自上层强迫和下层的水汽输送产生的大量而集中的凝结潜热。
A diagnostic analysis of both two explosive cyclogenesis and a general cyclone over westem-northern pacific ocean in 1979 is studied by both Potential vorticity and E-P flux.The analysis results demonstrate that explosive cyclogCnesis development mechanism is stratosphere lower-level abnormal increase cold vorticity moving to soothern and disturbance convective layer baroclinic band, and upperlevel colder air flow down, upper-lower couple developing. The main dynamic mechanism is upper-layer force action and lowerlayer aqueous vapour transports production large-conversence condensation latent heat.
出处
《海洋预报》
北大核心
2000年第3期28-36,共9页
Marine Forecasts
关键词
爆发性气旋
海洋
E-P通量
动力学
explosive cyclogenesis
potential vorticity, E-P flux
diagnostic analysis
