热带气象学报
熱帶氣象學報
열대기상학보
2009年
z1期
132-140
,共9页
范爱芬%陈列%娄小芬%郑沛群%彭霞云
範愛芬%陳列%婁小芬%鄭沛群%彭霞雲
범애분%진렬%루소분%정패군%팽하운
大暴雨%登陆台风%西风低槽%低空急流%物理量诊断%基本反射率%风暴跟踪信息%冰雹指数
大暴雨%登陸檯風%西風低槽%低空急流%物理量診斷%基本反射率%風暴跟蹤信息%冰雹指數
대폭우%등륙태풍%서풍저조%저공급류%물리량진단%기본반사솔%풍폭근종신식%빙박지수
torrential rain%landfall typhoon%low-level jet stream%west trough%physics quantum diagnoses%basic reflectivity%storm tracking information%hail stone index
大暴雨是浙江省乐清水库致洪的直接原因.利用NCEP 1°×1°全球再分析资料、常规资料、雷达资料和地面中尺度自动站资料,详细分析了2004-2008年乐清四中型水库大暴雨过程的发生、发展机制.水库大暴雨是在有利的大尺度环流背景下,不断有中小尺度系统的发生发展而产生.主要影响系统为登陆台风、西风低槽和低空急流.物理量诊断分析表明,低层强辐合,高层辐散、旺盛的上升运动以及强大的低空急流和充沛的水汽供给,为水库大暴雨的发生发展提供了极为有利的动力条件.台风强降水出现在台风螺旋雨带或者台风眼周围的密闭云团中的强降雨中心内.业务预报中可利用新一代天气雷达的基本反射率叠加风暴跟踪信息和冰雹指数,结合基本速度和垂直积分液态含水量等指标来跟踪台风强降雨中心,对水库大暴雨的监测和预警有重要意义.
大暴雨是浙江省樂清水庫緻洪的直接原因.利用NCEP 1°×1°全毬再分析資料、常規資料、雷達資料和地麵中呎度自動站資料,詳細分析瞭2004-2008年樂清四中型水庫大暴雨過程的髮生、髮展機製.水庫大暴雨是在有利的大呎度環流揹景下,不斷有中小呎度繫統的髮生髮展而產生.主要影響繫統為登陸檯風、西風低槽和低空急流.物理量診斷分析錶明,低層彊輻閤,高層輻散、旺盛的上升運動以及彊大的低空急流和充沛的水汽供給,為水庫大暴雨的髮生髮展提供瞭極為有利的動力條件.檯風彊降水齣現在檯風螺鏇雨帶或者檯風眼週圍的密閉雲糰中的彊降雨中心內.業務預報中可利用新一代天氣雷達的基本反射率疊加風暴跟蹤信息和冰雹指數,結閤基本速度和垂直積分液態含水量等指標來跟蹤檯風彊降雨中心,對水庫大暴雨的鑑測和預警有重要意義.
대폭우시절강성악청수고치홍적직접원인.이용NCEP 1°×1°전구재분석자료、상규자료、뢰체자료화지면중척도자동참자료,상세분석료2004-2008년악청사중형수고대폭우과정적발생、발전궤제.수고대폭우시재유리적대척도배류배경하,불단유중소척도계통적발생발전이산생.주요영향계통위등륙태풍、서풍저조화저공급류.물리량진단분석표명,저층강복합,고층복산、왕성적상승운동이급강대적저공급류화충패적수기공급,위수고대폭우적발생발전제공료겁위유리적동력조건.태풍강강수출현재태풍라선우대혹자태풍안주위적밀폐운단중적강강우중심내.업무예보중가이용신일대천기뢰체적기본반사솔첩가풍폭근종신식화빙박지수,결합기본속도화수직적분액태함수량등지표래근종태풍강강우중심,대수고대폭우적감측화예경유중요의의.
Torrential Rain can directly lead to flooding of Yueqing reservoirs. NCEP global re-analysis data, routine data, Radar data and ground medium-scale automatic observation data are used to analyze the occurring and developing mechanism of Yueqing reservoirs' torrential rains from 2004 to 2008. The torrential rains over the reservoirs occur in the favorable large scale circumlation background with the development of meso- and micro- scale weather systems. The main affecting systems include landfall typhoon, low-level jet stream and west trough. Physical quantity diagnoses show that low-level convergence and high-level divergence, strong rising , low-level jet stream and abundant water vapor supplies offer favorable dynamical condition for the torrential rain occurring and developing. The severe precipitation occurs in strong rain centers within typhoon spiral rain belts or thick clouds near typhoon eye. Typhoon's strong rain centers are tracked by following basic reflcctivity, storm tracking information and hailstorm index, combined with basic velocity and vertical integrate liquid water, which has significance to the supervising and forecasting of reservoirs heavy precipitation.