extratropical frontal cyclone温带锋面气旋
extratropical transition tropical cyclone变性TC
Cyclone extratropical非热带性气旋
cyclone extratropical storm气旋性温带风暴
Utilizing the equation of surface forecast, the seedtime of extratropical cyclone that influences Bohai Sea is theoretically analyzed.
利用地面形势预报方程，从理论上分析了影响渤海海域的温带气旋的发展过程。
参考来源 - 影响渤海客滚船航行安全的气象海况条件研究