摘要
利用micaps常规观测资料、ncep再分析资料,分析台风"山神"后期东北转向的原因,分析表明:500hPa副高东退南落是"山神"转向的关键;台风沿假相当位温高值轴线方向移动;环境风场的变化、200hPa高空辐散场中心偏离台风中心、卫星云图特征变化等都可能引起台风的转向;台风的内部特征(散度场、垂直速度场)的分布特点对台风移向有一定的关系。
Based on Micaps routine data and Ncep reanalysis data, the causes of typhoon ＂Son-tinh＂ northeast turning were studied. The results showed that： 500hPa subtropical high weakened and east retreated were the critical reasons of turning. Typhoon ＂Son-tinh＂ moved along the high values axis of potential pseudo-equivalent temperature. The changes of wind fieht, 200hPa divergence center that deviating from typhoon center, changes of satellite image characteristics caused typhoon ＂Son-tinh＂ turning. The distributions of typhoon ＂Son-tinh＂ internal characteristics, such as, divergence and vertical velocity, related to typhoon ＂Son-tinh＂ turning.
出处
《气象研究与应用》
2013年第4期9-13,30,共6页
Journal of Meteorological Research and Application
基金
中国气象局2013年预报员专项(CMAYBY2013-051)
关键词
台风
转向
假相当位温
辐散场
卫星云图
内部特征
Typhoon, turning, pseudo-equivalent temperature, divergence, satellite images, internal features.
