CAJ | 학술논문

利用逐小时自动站资料、TBB 资料、多普勒雷达资料和 NCEP 1°×1°再分析资料对2011年7月24—25日河北承德地区一次暴雨天气过程进行分析，并利用高分辨率中尺度数值模式 WRF 对此次暴雨过程进行了数值模拟。结果表明：此次河北承德地区暴雨天气过程地面自动站风场存在辐合中心，中尺度对流云团云顶 TBB ＜－60℃。雷达回波中心强度≥50 dBz的红色线状强回波镶嵌在较强的片状回波中，并长时间随着回波主体移动；暖平流与风场辐合迭加的速度场配置及高低空急流的存在，是河北承德地区此次大暴雨产生的主要原因。WRF 模式模拟了此次承德地区降水的水汽通量散度分布，低层水汽强烈辐合和聚集，为暴雨的产生提供了充沛的水汽；高层辐散大于低层辐合，抽吸作用使垂直运动发展，大量水汽从低层向高层输送，促进强降雨的形成和维持。
이용축소시자동참자료、TBB 자료、다보륵뢰체자료화 NCEP 1°×1°재분석자료대2011년7월24—25일하북승덕지구일차폭우천기과정진행분석，병이용고분변솔중척도수치모식 WRF 대차차폭우과정진행료수치모의。결과표명：차차하북승덕지구폭우천기과정지면자동참풍장존재복합중심，중척도대류운단운정 TBB ＜－60℃。뢰체회파중심강도≥50 dBz적홍색선상강회파양감재교강적편상회파중，병장시간수착회파주체이동；난평류여풍장복합질가적속도장배치급고저공급류적존재，시하북승덕지구차차대폭우산생적주요원인。WRF 모식모의료차차승덕지구강수적수기통량산도분포，저층수기강렬복합화취집，위폭우적산생제공료충패적수기；고층복산대우저층복합，추흡작용사수직운동발전，대량수기종저층향고층수송，촉진강강우적형성화유지。
Based on hourly meteorological data from automatic weather station,TBB data,Doppler radar data and NCEP 1°×1°reanalysis data,a rainstorm process on July 24 to 25,2011 in Chengde of Hebei province was ana-lyzed.A mesoscale numerical model WRF (Weather Research and Forecast)was used to simulate this process. The results show that there is a wind convergent center according to measured wind field data from automatic weather stations,and the TBB of mesoscale convective cloud clusters is less than -60 ℃ in this rainstorm process. On the radar chart,a thread type strong echo in red color with a central intensity up to 50 dBz embeds in a strong sheet echo and moves with main body echoes during a long time.Velocity field configurations of warm advection and wind convergence as well as high and low level jets are the main reasons causing the heavy rainstorm in Chengde of Hebei province.According to water vapor flux divergence distribution simulated using the WRF mod-el,it can be seen that strong convergence and aggregation of low-level moisture provide abundant moisture for this process.Pumping action leads to the development of vertical movement when divergence in upper level is stronger than convergence in lower level,thus a lot of water vapor is transported from lower level to upper level,which pro-motes the formation and maintenance of heavy rainfall.