CAJ | 학술논문

利用常规观测资料、NCEP1°×l°逐6h再分析资料、FY-2E静止卫星红外云图反演的逐时TBB资料及长沙多普勒天气雷达产品，对2011年6月10日由低涡切变系统引发的湘中区域暴雨进行诊断分析。结果表明：湘中暴雨发生在高空低槽与中低层低涡相配合的环流背景下，暴雨中心具有低层正涡度（辐合）、高层负涡度（辐散）的垂直结构；此次湘中暴雨过程强降水的出现与TBB最低值并不同步，而是落后于TBB最低值1-3h，强降水区主要出现在云团后侧TBB梯度较大区域内；该暴雨回波为典型的混合性降水回波，逆风区移过的地区对应强降水区，逆风区出现后的半个小时内为强降水时段，逆风区消失后降水明显减弱，中层弱冷空气增加了暴雨区对流性不稳定。
이용상규관측자료、NCEP1°×l°축6h재분석자료、FY-2E정지위성홍외운도반연적축시TBB자료급장사다보륵천기뢰체산품，대2011년6월10일유저와절변계통인발적상중구역폭우진행진단분석。결과표명：상중폭우발생재고공저조여중저층저와상배합적배류배경하，폭우중심구유저층정와도（복합）、고층부와도（복산）적수직결구；차차상중폭우과정강강수적출현여TBB최저치병불동보，이시락후우TBB최저치1-3h，강강수구주요출현재운단후측TBB제도교대구역내；해폭우회파위전형적혼합성강수회파，역풍구이과적지구대응강강수구，역풍구출현후적반개소시내위강강수시단，역풍구소실후강수명현감약，중층약랭공기증가료폭우구대류성불은정。
Diagnostic analysis was performed on a regional rainstorm triggered by low-vortex shear on 10 June 2011 in central Hunan with conventional observations, NCEP 6-hourly reanalysis data with resolution 1°×1°, hourly TBB data from FY-2E geostationary satellite IR im- ages inversion and Changsha Doppler radar products. The results indicate that the rainstorm occurred against the circulation background of trough in the high level matching with low vortex in the mid- and low-level. The center of the rainstorm had vertical structure with positive vorticity （convergence） in the low-level and negative vorticity （divergence） in the high level. The severe precipitation during the event was not synchronized with the TBB minimum value, but lagged behind the TBB minimum value for 1-3 h, so the distribution of severe precipitation located significantly in the high TBB gradient area on the back of the cloud clusters. Echo of the rainstorm was a typical mixed precipitation echoes. The area where head wind zone passed is corresponding with the distribution of severe precipitation, within half an hour after the oc- currence of head wind zone, the precipitation was severe. Precipitation significantly decreased after the disappearance of the head wind zone, while weak cold air in the middle level increased the convective instability of rainstorm areas.