超强台风“天兔”的大风对广州白云机场影响过程分析

Analysis on the influence process of super typhoon "Usagi" on Guangzhou Baiyun Airport

2013年9月22日1319号台风“天兔”以强台风级在广东省汕尾市沿海登陆,登陆后台风眼中心经过了广州白云机场。利用常规观测站、卫星云图和风廓线雷达和多普勒天气雷达观测资料等,探讨台风“天兔”登陆前后产生的大风对广州白云机场的影响。结果表明:对台风“天兔”大风影响广州白云国际机场时间预报准确,但对大风的强度以及风向的预报存在不足。利用探空资料、风廓线雷达和多普勒天气雷达,分析发现台风“天兔”风力的非对称结构是造成预报偏差的原因。风廓线雷达和多普勒天气雷达可以很好地反映台风风场的水平和垂直精细特征。

Super Typhoon "Usagi"(No. 1319) landed in the coastal area of Shanwei,Guangdong Province on September 22,2013,the eye of which passed through the Guangzhou Baiyun Airport. The effects of high winds generated before and after the landfall of typhoon "Usagi" on Guangzhou Baiyun Airport were discussed by using conventional observation stations,satellite cloud images and observation data of wind profile radar and Doppler weather radar. The results show that the timing of strong wind affected airport was accurately forecasted. However,wind speed and direction forecasts were not very satisfactory. After moving on land,the asymmetric structure of typhoon wind fields was enhanced,this was the major reason for limitation of wind forecasts. Using wind profiler radar and Doppler weather radar,the horizontal and vertical wind fields of typhoon were able to be observed more precisely,which should significantly improve the typhoon wind speed and direction forecasts.