CAJ | 학술논문

选取2008-2011年湖北省7个暖干类暴雨个例，利用GFS的0.5°×0.5°再分析资料进行合成分析。结果表明：湖北暖干类暴雨过程中，正涡度平流不是大范围出现，而是以正涡度平流核的形式出现并随着风场流转，使暴雨区各层涡度平流的配置快速发生变化，易引起上升运动的突然加强；暖平流从中高层扩展至整层，强暖平流中心出现在临近暴雨发生时的边界层，热力强迫导致低层强辐合，950 hPa上下强暖平流中心与暴雨点位置较一致，对暖干类暴雨的预报有较好的指示意义；中层干空气和低层暖湿空气的侵入是暴雨区对流不稳定增长的主要影响因子，均与副热带高压的西伸发展有关。
선취2008-2011년호북성7개난간류폭우개례，이용GFS적0.5°×0.5°재분석자료진행합성분석。결과표명：호북난간류폭우과정중，정와도평류불시대범위출현，이시이정와도평류핵적형식출현병수착풍장류전，사폭우구각층와도평류적배치쾌속발생변화，역인기상승운동적돌연가강；난평류종중고층확전지정층，강난평류중심출현재림근폭우발생시적변계층，열력강박도치저층강복합，950 hPa상하강난평류중심여폭우점위치교일치，대난간류폭우적예보유교호적지시의의；중층간공기화저층난습공기적침입시폭우구대류불은정증장적주요영향인자，균여부열대고압적서신발전유관。
Base on the 0.5 °×0.5 °NCEP-GFS reanalysis data,seven warm-dry heavy rain events from 2008 to 20 1 1 in Hubei province were analyzed.The results indicate that positive vorticity advection doesn′t occur in large areas during a warm-dry heavy rain process,but moves with wind as a positive vorticity advection core,which leads to rapid variation of vorticity advection in different tropospheric layers over the heavy rain areas.This is easy to make the upward motion strengthened suddenly.Warm advection expands from mid-upper troposphere to the whole troposphere;strong warm advection center appears in boundary layer where the heavy rains just occur;ther-mal forcing action leads to strong convergence in lower troposphere;locations of upper-lower strong warm advec-tion center of 950 hPa and heavy rain area are similar;the above four conditions are indicative to prediction of warm-dry heavy rain.Invasion of dry air in the middle troposphere and warm-moist air in the lower troposphere is a main impacting factor for increase of convective instability in the heavy rain areas,and both are related to the westward development of subtropical high.