【摘要】 利用常规气象观测资料、卫星云图和NECP再分析资料,采用天气学诊断分析方法,对2017年第13号台风"天鸽"在近海急剧增强并达到超强台风级的特征进行了分析,讨论了其强度在近海急剧增强的原因。结果表明,南亚高压、西太平洋副高和低空急流的相互作用是"天鸽"近海急剧增强的主要影响系统;低层辐合与高层辐散、弱的环境风垂直切变和异常偏暖的近海海面温度是"天鸽"近海急剧加强的原因;100h Pa南亚高压南侧的东风急流显著加强有利于高层辐散和台风高层的出流。更多还原

【Abstract】 Based on the conventional observation data, FY series satellite cloud map and NECP 1° ×1°reanalysis data, the causes of rapid intensification of super typhoon "Hato"(1713) over the offshore area of Guangxi were analyzed by means of synoptic diagnostic analysis. It is shown that the interaction of the southern pressure high, the western Pacific subtropical high and the low altitude jet is the main influence system of offshore intensification.Low level convergence and high level divergence, weak vertical shear of ambient wind and abnormally warm offshore sea surface temperature are the factors lead to the rapid intensification. The strengthening of the easterly jet on the south side of the 100 hpa high is beneficial to the divergence of the upper layer and the outflow of the typhoon.更多还原