气象与减灾研究
氣象與減災研究
기상여감재연구
Meteorology and Disaster Reduction Research
2015年
3期
43-52
,共10页
万明%陈云辉%支树林%吴媛
萬明%陳雲輝%支樹林%吳媛
만명%진운휘%지수림%오원
台前飑线%垂直风切变%物理量%生命史
檯前颮線%垂直風切變%物理量%生命史
태전박선%수직풍절변%물리량%생명사
pre-TC squall line%contrast analysis%vertical wind shear%life history
利用常规观测、雷达资料和NCEP 1°×1°再分析资料,对路径相似台风“派比安”(2006)和“威马逊”(2014)的前部飑线过程进行对比分析。结果表明,地面辐合线和边界层辐合系统为台前飑线的发生发展提供了必要的动力条件,持续强盛的东南急流提供了充足的水汽和能量输送。低层暖、高层冷且具有较大垂直温差的特征为台前飑线的形成提供了有利的热力不稳定条件,而强的CAPE积累和释放有利于对流强度的加强。高空槽并入台风倒槽有利于延长飑线的生命史。台前飑线从垂直风切变相对较弱的区域移入较强的区域有利于其组织和发展,反之则不利于其组织和维持。台前飑线移动路径前方存在水汽辐合有利于其发展,反之则不利于其维持。
利用常規觀測、雷達資料和NCEP 1°×1°再分析資料,對路徑相似檯風“派比安”(2006)和“威馬遜”(2014)的前部颮線過程進行對比分析。結果錶明,地麵輻閤線和邊界層輻閤繫統為檯前颮線的髮生髮展提供瞭必要的動力條件,持續彊盛的東南急流提供瞭充足的水汽和能量輸送。低層暖、高層冷且具有較大垂直溫差的特徵為檯前颮線的形成提供瞭有利的熱力不穩定條件,而彊的CAPE積纍和釋放有利于對流彊度的加彊。高空槽併入檯風倒槽有利于延長颮線的生命史。檯前颮線從垂直風切變相對較弱的區域移入較彊的區域有利于其組織和髮展,反之則不利于其組織和維持。檯前颮線移動路徑前方存在水汽輻閤有利于其髮展,反之則不利于其維持。
이용상규관측、뢰체자료화NCEP 1°×1°재분석자료,대로경상사태풍“파비안”(2006)화“위마손”(2014)적전부박선과정진행대비분석。결과표명,지면복합선화변계층복합계통위태전박선적발생발전제공료필요적동력조건,지속강성적동남급류제공료충족적수기화능량수송。저층난、고층랭차구유교대수직온차적특정위태전박선적형성제공료유리적열력불은정조건,이강적CAPE적루화석방유리우대류강도적가강。고공조병입태풍도조유리우연장박선적생명사。태전박선종수직풍절변상대교약적구역이입교강적구역유리우기조직화발전,반지칙불리우기조직화유지。태전박선이동로경전방존재수기복합유리우기발전,반지칙불리우기유지。
Using convention observational data, radar data and NECP(1°×1°) reanalysis data, squall lines preceding of the Typhoon Prapiroon(0606) and Typhoon Rammason(1409) with similar tracks were contrastively analyzed. The results showed that the surface convergence line and boundary layer convergence system provided the necessary dynamic condition for the occurrence and development of pre-TC(Tropical cyclone) squall line, and continued strong southeast jet provided sufficient vapor and energy for it. The characteristic of low layer warm and high-level cold which had a large vertical temperature difference provided a favorable thermal instability condition for the formation of pre-TC squall line. And convection intensity would be strengthened by strong CAPE accumulation and release. The upper trough merged into the inverted typhoon trough was conductive to prolonging the life history of pre-TC squall line. Pre-TC squall line moved from area of weak vertical wind shear to area of relatively strong vertical wind shear was conductive to its organization and development. Strong vapor convergence in front of the pre-TC squall line was conductive to its development.