气象与环境科学
氣象與環境科學
기상여배경과학
METEOROLOGICAL AND ENVIRONMENTAL SCIENCES
2011年
4期
40-45
,共6页
寒潮%诊断分析%地转湿Q矢量%垂直螺旋度
寒潮%診斷分析%地轉濕Q矢量%垂直螺鏇度
한조%진단분석%지전습Q시량%수직라선도
cold wave%diagnosis analysis%Q vector%vertical helicity
应用1°×1°NCAR／NCEP再分析格点资料，对2006年4月11-12日发生在河南省的一次强寒潮天气过程进行了热力因子和动力因子的诊断分析，结果发现：这次寒潮天气过程是西路和东路两股冷空气与暖平流共同作用促进蒙古气旋发展，并使低槽、冷锋东移南压造成的；不同的层结条件下垂直速度对河南前期增温、后期剧烈降温有利；非地转湿Q矢量激发的次级环流下沉支的强弱变化及移近、移出与河南省大风天气的强弱发展过程有良好的对应关系；垂直螺旋度大值带的移动和发展对大风落区有较好的指示意义。
應用1°×1°NCAR／NCEP再分析格點資料，對2006年4月11-12日髮生在河南省的一次彊寒潮天氣過程進行瞭熱力因子和動力因子的診斷分析，結果髮現：這次寒潮天氣過程是西路和東路兩股冷空氣與暖平流共同作用促進矇古氣鏇髮展，併使低槽、冷鋒東移南壓造成的；不同的層結條件下垂直速度對河南前期增溫、後期劇烈降溫有利；非地轉濕Q矢量激髮的次級環流下沉支的彊弱變化及移近、移齣與河南省大風天氣的彊弱髮展過程有良好的對應關繫；垂直螺鏇度大值帶的移動和髮展對大風落區有較好的指示意義。
응용1°×1°NCAR／NCEP재분석격점자료，대2006년4월11-12일발생재하남성적일차강한조천기과정진행료열력인자화동력인자적진단분석，결과발현：저차한조천기과정시서로화동로량고랭공기여난평류공동작용촉진몽고기선발전，병사저조、랭봉동이남압조성적；불동적층결조건하수직속도대하남전기증온、후기극렬강온유리；비지전습Q시량격발적차급배류하침지적강약변화급이근、이출여하남성대풍천기적강약발전과정유량호적대응관계；수직라선도대치대적이동화발전대대풍락구유교호적지시의의。
By using 1 ° × 1 ° NCAR/NCEP reanalysis grid data, a strong cold wave weather was diagnosed by analyzing the heat factor and power factor, which happened in Henan province during April 11- 12, 2006. The results showed that the cold air coming from west load and east load co-act with warm advection to induce the development of Mongolia cyclone, on the other hand, lead low trough and cold front eastward movement and southward push down, which produce the cold wave process. The vertical velocity in different stratification conditions is beneficial to pre-warming and post-cooling sharply in Henan. The strength variety and movement of sinking branch of the secondary circulation stimulated by ageostrophic wet Q vector, has a good relationship with the change of windy weather in Henan. The movement and development of vertical helicity area with great value has a good indication for the gale loading zone.
