CAJ | 학술논문

提冷季暴雨特别是南方冷季暴雨不但常有发生，其强度和灾害甚至不亚于暖季暴雨。统计表明约有80％的华南冷季强降水与热带卷云羽（简称TP）活动相对应。为此，本文利用近7年FY-2静止气象卫星、TRMM卫星合成降水率数据、EC-MWF Interim再分析资料以及地面与探空的常规观测资料等，综合分析了与华南冷季暴雨相关的热带卷云羽的相关特征。分析结果表明，与华南冷季降水有关的TP云产生的源地主要集中在0°～10°N、70°～140°E 之间区域内。青藏高原大地形作用对TP引起的华南冷季降水分布具有不可忽视的作用。Hovmller图分析显示，TP 云在爆发前，云系大多呈连续西传的特征，传播速度约为15～20 m·s-1，与大尺度斜压波波速相当或略快。一般来说，与弱降水相比，引起强降水的TP云在爆发前移速较快，受来自对流层中上层的动力强迫影响较大。TP云爆发后，云内强对流区总体移动速度不快，大部分集中在TP 云的西南端较小范围内。副热带高空急流只是使得TP云的云盖快速向东扩展。上述特征可能是造成华南冷季强降水中只有个别站点强度大而整体降水强度不强的可能原因。
제랭계폭우특별시남방랭계폭우불단상유발생，기강도화재해심지불아우난계폭우。통계표명약유80％적화남랭계강강수여열대권운우（간칭TP）활동상대응。위차，본문이용근7년FY-2정지기상위성、TRMM위성합성강수솔수거、EC-MWF Interim재분석자료이급지면여탐공적상규관측자료등，종합분석료여화남랭계폭우상관적열대권운우적상관특정。분석결과표명，여화남랭계강수유관적TP운산생적원지주요집중재0°～10°N、70°～140°E 지간구역내。청장고원대지형작용대TP인기적화남랭계강수분포구유불가홀시적작용。Hovmller도분석현시，TP 운재폭발전，운계대다정련속서전적특정，전파속도약위15～20 m·s-1，여대척도사압파파속상당혹략쾌。일반래설，여약강수상비，인기강강수적TP운재폭발전이속교쾌，수래자대류층중상층적동력강박영향교대。TP운폭발후，운내강대류구총체이동속도불쾌，대부분집중재TP 운적서남단교소범위내。부열대고공급류지시사득TP운적운개쾌속향동확전。상술특정가능시조성화남랭계강강수중지유개별참점강도대이정체강수강도불강적가능원인。
Cold season rainstorm is not rare in China and sometimes its strength and induced disaster is greater than that of warm season.Statistics show that about 80% cold-season rainstorm events in South China are related to tropical plumes (TP).Therefore,in this paper,seven-year (2005-2011)FY-2 geo-stationary satellite data,TRMM-adjusted merged-infrared precipitation dataset (3B42),ECMWF Interim reanalysis data and conventional observations including surface and soundings are used to examine the char-acteristics and behavior of tropical plumes which are dealt with cold-season rainstorms in South China.The analyses reveal that most of the tropical plumes related to the cold-season rainstorms in South China are generated within 0°-10°N,70°-140°E area.The topographical effect to TP caused by the Tibetan Plateau can not be ignored.According to the propagation characteristics,the tropical plumes before eruption ex- <br> hibit westward propagating in longitude-time (Hovmoller)space,with a preferred phase speed of 15-20 m·s-1 ,comparable to or faster than the synoptic baroclinic wave.Generally,tropical plumes which are related to heavy rainfall always move faster in the pre-eruption stage and are significantly influenced by the dynamic forcing coming from the mid-upper level of troposphere than those dealt with weak rainfall.The pattern of the tropical plumes after eruption in the longitude-time space suggest that the convection part in the cloud moves slowly and concentrates at the south-west end of plumes.The sub-tropical upper level jets act only to make the cloud cover to expand eastward quickly.The above features may cause the heavy rain-fall centralized only over some stations .