CAJ | 학술논문

应用2004-2013年NCEP/NCAR再分析资料和浙江北部雨量资料，对梅雨期间低涡活动进行统计分类，并对低涡与浙北暴雨的关系进行了分析。结果表明：梅雨期平均每年有5.6个低涡活动，夜间02时生成的低涡最多，早晨最少，低涡生命期多在24~48 h之间；依据涡源，低涡可分为三类，其中西南涡最多，占总数的42%，生成后向东北方向移动；有低涡影响的暴雨约占暴雨总数的63%，其中73%受西南涡影响，且发生在夜间的暴雨受低涡影响概率比白天大；低涡东南侧暖区暴雨比低涡后部冷切暴雨略多，暖区暴雨发生时，低涡中心多位于安徽省，最远距浙北约400 km，高空多小槽活动；而在冷切暴雨中，切变线距离浙北200 km以内，75%的西风槽已移至我国东部沿海。
응용2004-2013년NCEP/NCAR재분석자료화절강북부우량자료，대매우기간저와활동진행통계분류，병대저와여절북폭우적관계진행료분석。결과표명：매우기평균매년유5.6개저와활동，야간02시생성적저와최다，조신최소，저와생명기다재24~48 h지간；의거와원，저와가분위삼류，기중서남와최다，점총수적42%，생성후향동북방향이동；유저와영향적폭우약점폭우총수적63%，기중73%수서남와영향，차발생재야간적폭우수저와영향개솔비백천대；저와동남측난구폭우비저와후부랭절폭우략다，난구폭우발생시，저와중심다위우안휘성，최원거절북약400 km，고공다소조활동；이재랭절폭우중，절변선거리절북200 km이내，75%적서풍조이이지아국동부연해。
Based on the NCEP/ NCAR reanalysis data from 2004 to 2011 and northern Zhejiang rainfall data, we analyzed the characteristics of vortexes and their relationship to heavy rain events. The results showed that there was about 5.6 vortexes per year in Meiyu season, the vortex generated at most in the night and at least in the morning, most of vortex survivaled 24~48h. The vortex can be divided into three categories, most of vortex belonged to southwest vortex which accounted for 42%of the total and moved to the northeast after generation. The heavy rain was effected by vortex in the night more than in the daytime which was approximately 63% of the total rainstorm and 73% by southwest vortex. The warm rainstorm appeared in southeast of the vortex slightly more than the rainstorm in back of the vortex, the vortex center was located in Anhui province when the warm rainstorm happened and the most distant from north Zhejiang about 400km, but in the other type of rainstorm, the shear line distances within 200km to north Zhejiang.