气象2011，Vol.37Issue(12)：1534-1543,10.
干侵入在黄河气旋爆发性发展中的作用
Dry Intrusion into the March 2007 Strong Storm Surge over Bohai Sea
摘要
Abstract
Based on the dry intrusion theory and potential vorticity theorem,by using the water vapor image and NCEP/NCAR 1°×1°reanalysis data,the synoptic and dynamic characteristics of a strong storm surge over the Bohai Sea from 3 to 5 March 2007 are analyzed.The feature and influence of dry intrusion on the Yellow River cyclone are also revealed.The result shows that the storm surge occurred during the adjustment of Eurasia mid and high latitude circulation,the east moving and development of unstable low rough and the rebuilding of East-Asia major trough.Northerly gale induced by strongly developed the Yellow River cyclone forced the surge to sharply bloom.Dry intrusion has features of high PV value.The shape and strength changes of high PV area,with dark zone on water vapor image,have a meaningful prediction to different stages of cyclones.When dry-cold air currents meet with warmer wet air flow along a inverted ＂Ω＂ lapping belt from north to south,the isentropic surface becomes steeper and the stability of atmosphere decreases.Although the downward progress of dry intrusion from high level will lead to warming effect,the cooling effect from the strong cold advection can give birth to decreasing of atmospheric stability.Therefore the high level vortex,corresponding to surface cyclone,has lower temperature than the adjacent areas.As a result,the mid-low level cyclonic vorticity is increased,the upward vertical movement is reinforced,and then the surface cyclone is strongly developed.关键词
黄河气旋/爆发性发展/水汽图像/位涡/干侵入Key words
Yellow River cyclone/explosive development/water vapor image/potential vorticity/dry intrusion分类
天文与地球科学引用本文复制引用
黄彬,钱传海,聂高臻,向纯怡..干侵入在黄河气旋爆发性发展中的作用[J].气象,2011,37(12):1534-1543,10.基金项目
黄渤海高影响天气预报中的关键技术研究（GYHY201106006）项目资助 （）
