CAJ | 학술논문

利用常规气象观测资料、NCEP 1°×1°再分析资料、FY-2E卫星云图及相关定量产品，分析了2013年8月18-19日浙江北部一次大暴雨天气过程。结果表明：(1)热带低压是此次暴雨产生的直接影响系统，低压与副热带高压之间偏东风急流为暴雨产生提供了水汽和能量条件。(2)热带低压具有明显的不对称结构，其中心随高度西倾；强对流云团主要分布在500 hPa低压环流北侧，也是此过程强降水的直接制造者，其移动演变与强降水区移动演变一致。(3)卫星云图及相关产品分析表明，相当黑体亮温(TBB)、射出长波辐射(OLR)低值带对强降水区具有较好的指示意义，其值大小对降水强度有较好反映；在实际业务中，可结合实况和卫星云图及相关定量产品对预报及时作出订正。(4)此过程水汽主要来源于东海，边界层为水汽通量辐合区；强降水区与850 hPa假相当位温密集带垂直；地面中小尺度系统为暴雨产生提供了有利的抬升条件；杭州湾喇叭口地形对降水有明显增幅效应。
이용상규기상관측자료、NCEP 1°×1°재분석자료、FY-2E위성운도급상관정양산품，분석료2013년8월18-19일절강북부일차대폭우천기과정。결과표명：(1)열대저압시차차폭우산생적직접영향계통，저압여부열대고압지간편동풍급류위폭우산생제공료수기화능량조건。(2)열대저압구유명현적불대칭결구，기중심수고도서경；강대류운단주요분포재500 hPa저압배류북측，야시차과정강강수적직접제조자，기이동연변여강강수구이동연변일치。(3)위성운도급상관산품분석표명，상당흑체량온(TBB)、사출장파복사(OLR)저치대대강강수구구유교호적지시의의，기치대소대강수강도유교호반영；재실제업무중，가결합실황화위성운도급상관정양산품대예보급시작출정정。(4)차과정수기주요래원우동해，변계층위수기통량복합구；강강수구여850 hPa가상당위온밀집대수직；지면중소척도계통위폭우산생제공료유리적태승조건；항주만나팔구지형대강수유명현증폭효응。
By using the conventional data of meteorological observations, NCEP 6-hourly reanalysis data with resolution 1° × 1° , and FY-2E satellite cloud and related quantitative products, we analyzed an extremely heavy rain event occurred from August 18 to 19 of 2013 in the north of Zhejiang. The results show that (1) the tropical depression is the system that direct impacted on the event. In addition, the easterly jet stream between the depression and subtropical high over the west Pacific provide moisture and energy for the formation of the event;(2) There is evidently an asymmetric structure with tropical depression, which the centers of depression lean westward with height. Strong convec-tive cloud clusters distributed mainly in the north side of low pressure circulation at 500 hPa lead directly to the event, and the movement of clusters are in accordance with the distribution of the strong precipitation;(3) Analysis of satellite cloud images and related products indicate that changes of blackbody temperature (TBB) and lower value center of outgoing longwave radiation (OLR) are of indicative significance to the distribution of the strong precipitation, whose magnitudes have a good response for the precipitation intensity;(4) Water vapor required by the event comes mainly from the East China Sea, and the water vapor flux convergence zone is situated in boundary layer. Strong precipitation ar-ea is perpendicular to the concentrated pseudo-equivalent potential temperature isoneph zone. Meso-and micro-scale systems at ground lev-el provide favorable lifting conditions for the occurrence of the event, and the trumpet-shaped topography in Hangzhou bay has clear effect on the increase of rainfall.