CAJ | 학술논문

利用天气雷达、自动站及常规资料,对2005年6月21日夜间经过滨州市的一次东北路飑线天气过程进行分析.结果表明,诊断影响系统时要注意对流层高层的系统;横槽切变线,高层冷空气,低层暖空气,地面剧烈增温,都有利于促进对流不稳定;卫星云图上云团呈密实的椭圆形预示着对流非常强,可能会有飑线产生;在雷达回波图上呈人字形或弧形,有"牛眼"结构,主回波前缘有细长带状弱回波是出现大风的征兆;垂直风廓线上的低层水平风向的逆时针变化与地面自动站风的辐散相对应,地面自动站风的辐散处为下击暴流发生处.
이용천기뢰체、자동참급상규자료,대2005년6월21일야간경과빈주시적일차동북로박선천기과정진행분석.결과표명,진단영향계통시요주의대류층고층적계통;횡조절변선,고층랭공기,저층난공기,지면극렬증온,도유리우촉진대류불은정;위성운도상운단정밀실적타원형예시착대류비상강,가능회유박선산생;재뢰체회파도상정인자형혹호형,유"우안"결구,주회파전연유세장대상약회파시출현대풍적정조;수직풍곽선상적저층수평풍향적역시침변화여지면자동참풍적복산상대응,지면자동참풍적복산처위하격폭류발생처.
Based on weather radar, automatic weather station and conventional observation data, the squall line from northeast occurred in the night of 21 June 2005 in Binzhou City was analyzed. The analysis showed the characteristics of the meteorological elements. The system which plays a major role was in the upper troposphere. Transversal trough, shear line, high-altitude cold air, low-altitude warm air, and severe warming on the ground surface were conducive to the promotion of convective instability. They were the causes of producing the squall line. The squall line clouds on satellite images showed dense and oval. They indicated that convection was strong and squall line may be generated. In the radar echo images the squall line showed herringbone or bow, bull's-eye structure and the main front was associated with thin ribbon weak echo which was the sign of the emergence of gale. The wind divergence observed by automatic weather station was related with downburst, and counter-clockwise changes of the wind direction in vertical wind profile products.