气象与环境学报
氣象與環境學報
기상여배경학보
JOURNAL OF METEOROLOGY AND ENVIRONMENT
2014年
6期
1-7
,共7页
才奎志%蒋大凯%杨磊%于增华%孙晓巍%陈宇%谭世君
纔奎誌%蔣大凱%楊磊%于增華%孫曉巍%陳宇%譚世君
재규지%장대개%양뢰%우증화%손효외%진우%담세군
能量舌%中尺度涡旋%地形强迫%斜升气流
能量舌%中呎度渦鏇%地形彊迫%斜升氣流
능량설%중척도와선%지형강박%사승기류
High energy tongue%Mesoscale vortex%Terrain force%Oblique ascension airflow
利用常规和加密自动气象站观测资料、卫星和雷达探测资料及NCEP再分析资料(1°×1°,6 h),对2013年8月15—16日辽宁黑山地区特大暴雨的中尺度对流条件和对流系统特征进行分析。结果表明:此次强降水由中—β尺度系统引起,短时大暴雨发生在能量舌边缘,地面偏东风和地形强迫抬升作用造成对流单体沿山脉东侧生成、发展和移动,最终导致持续对流性强降雨。东北低压冷锋前激发的中尺度切变和涡旋触发了局地大暴雨。黑山地区上游有两个对流单体生成,向东移动合并影响该地区,移动方向前侧的斜升气流和低质心回波提高了降水效率。
利用常規和加密自動氣象站觀測資料、衛星和雷達探測資料及NCEP再分析資料(1°×1°,6 h),對2013年8月15—16日遼寧黑山地區特大暴雨的中呎度對流條件和對流繫統特徵進行分析。結果錶明:此次彊降水由中—β呎度繫統引起,短時大暴雨髮生在能量舌邊緣,地麵偏東風和地形彊迫抬升作用造成對流單體沿山脈東側生成、髮展和移動,最終導緻持續對流性彊降雨。東北低壓冷鋒前激髮的中呎度切變和渦鏇觸髮瞭跼地大暴雨。黑山地區上遊有兩箇對流單體生成,嚮東移動閤併影響該地區,移動方嚮前側的斜升氣流和低質心迴波提高瞭降水效率。
이용상규화가밀자동기상참관측자료、위성화뢰체탐측자료급NCEP재분석자료(1°×1°,6 h),대2013년8월15—16일료녕흑산지구특대폭우적중척도대류조건화대류계통특정진행분석。결과표명:차차강강수유중—β척도계통인기,단시대폭우발생재능량설변연,지면편동풍화지형강박태승작용조성대류단체연산맥동측생성、발전화이동,최종도치지속대류성강강우。동북저압랭봉전격발적중척도절변화와선촉발료국지대폭우。흑산지구상유유량개대류단체생성,향동이동합병영향해지구,이동방향전측적사승기류화저질심회파제고료강수효솔。
Based on data from conventional and automatic weather stations,satellite and radar,and the NCEP rean-alysis data (1 °×1 °,6 h),the mesoscale convective conditions and convective system characteristics of an extraor-dinary rainstorm process on August 15-16,2013 at Heishan of Liaoning province were analyzed.The results show that the severe precipitation process is caused by mesoscale-βconvectional systems.The short-term torrential rain area occurs at the edge of energy tongue.Surface eastward wind and topographic force are dominant factors that causes generation,development and movement of convection cells along the east side of mountain,which lead to the continuous and convectional precipitation.The mesoscale wind shear and vortex motivated by the northeast low-pressure cold front trigger the local torrential rain.Two separate convective cells generate in upper reaches of heavy rain areas,and merge together and then influence Heishan County.The oblique ascension airflow in front of echo moving direction and low heart echo both enhance precipitation efficiency.