大气科学学报
大氣科學學報
대기과학학보
JOURNAL OF NANJING INSTITUTE OF METEOROLOGY
2012年
1期
64-72
,共9页
雷暴大风%雷达回波%预警%模型
雷暴大風%雷達迴波%預警%模型
뇌폭대풍%뢰체회파%예경%모형
thunderstorm gale%radar echo%warning%model
通过对2003-2009年湖北省东部26个雷暴大风过程的雷达、地面、高空、NCEP6h再分析场等资料的研究,依据雷达回波形态特征,将造成雷暴大风的雷达回波分为3种类型,即单体型、弓状型和飑线型。统计分析了每种类型雷达回波强度、回波顶高、垂直液态含水量、中层辐合特征、入流急流、中气旋及环境场条件等特征,研究了这3种雷暴大风天气的雷达回波生命史演变规律,并建立了其雷达回波概念模型。分析表明,单体型雷暴大风提前预警难度较大,但对弓状型和飑线型雷暴大风多数可以提前30min左右做出预警。
通過對2003-2009年湖北省東部26箇雷暴大風過程的雷達、地麵、高空、NCEP6h再分析場等資料的研究,依據雷達迴波形態特徵,將造成雷暴大風的雷達迴波分為3種類型,即單體型、弓狀型和颮線型。統計分析瞭每種類型雷達迴波彊度、迴波頂高、垂直液態含水量、中層輻閤特徵、入流急流、中氣鏇及環境場條件等特徵,研究瞭這3種雷暴大風天氣的雷達迴波生命史縯變規律,併建立瞭其雷達迴波概唸模型。分析錶明,單體型雷暴大風提前預警難度較大,但對弓狀型和颮線型雷暴大風多數可以提前30min左右做齣預警。
통과대2003-2009년호북성동부26개뇌폭대풍과정적뢰체、지면、고공、NCEP6h재분석장등자료적연구,의거뢰체회파형태특정,장조성뇌폭대풍적뢰체회파분위3충류형,즉단체형、궁상형화박선형。통계분석료매충류형뢰체회파강도、회파정고、수직액태함수량、중층복합특정、입류급류、중기선급배경장조건등특정,연구료저3충뇌폭대풍천기적뢰체회파생명사연변규률,병건립료기뢰체회파개념모형。분석표명,단체형뇌폭대풍제전예경난도교대,단대궁상형화박선형뇌폭대풍다수가이제전30min좌우주출예경。
Using the radar data, surface data and upper air data and NCEP (6-hr interval) reanalysis data on 26 cases of thunderstorm from 2003 to 2009 in eastern Hubei Province, the radar echoes caused thunderstorm gale are divided to three types, namely single-cell thunderstorm, bow thunderstorm and squall-line thunderstorm according to the morphology features of radar echoes. This paper statistically analyses the characteristics of radar base reflectivity, echo tops, vertical integrated liquid, mid-altitude radial convergence,inflow jet, mesocyclone and atmospheric conditions of the three types, and establishes the three radar echo conceptual models based on the evolution of radar echoes caused thunderstorm gale. Results show that the bow thunderstorm and squall line thunderstorm can be warned about 30 min in advance ,but it is difficulty to advance the warning of single-cell thunderstorm.