现代农业科技
現代農業科技
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XIANDAIHUA NONGYE
2014年
22期
216-219,222
,共5页
环渤海强对流%卫星与雷达同步监测%成因分析%可预报性%2012年9月27日
環渤海彊對流%衛星與雷達同步鑑測%成因分析%可預報性%2012年9月27日
배발해강대류%위성여뢰체동보감측%성인분석%가예보성%2012년9월27일
area of Bohai sea severe convective%synchronous satellite and radar monitoring%cause analysis%predictability
利用FY-2E卫星云图、天气雷达拼图、中央台强对流逐小时监测、海岛站及数值模式产品等资料,对2012年9月27日12：00-20：00(CST)出现在环渤海强对流天气过程进行分析。结果表明：位于内蒙东部的低涡系统东移南压,进入河北东部低涡有干冷空气侵入,槽前暖湿气流与地面冷锋叠加,8：000~6 km垂直风切变跃20 m/s,K指数为33℃,SI指数为-3.8℃,14：00 CAPE达1883 J/kg,导致强对流天气的发生。同步监测显示：12：00 MCS生成于北京至河北北部,云图中尺度象元TBB为-65~-25℃,带状对流云团强弱交替变化为3~6 h,渤海西海岸带强对流最强时段在14：00-17：00,出现2条飑线,回波强度大于50 dBz,其中影响秦皇岛的飑线1 h温度下降10℃、气压下降2.7 hPa；19：00 MCS主体入海后断裂,20：00-21：00在莱州湾及大连半岛重新增强。渤海西海岸带以短时大风、冰雹为主,东海岸带为强降水,雷电大于8h。
利用FY-2E衛星雲圖、天氣雷達拼圖、中央檯彊對流逐小時鑑測、海島站及數值模式產品等資料,對2012年9月27日12：00-20：00(CST)齣現在環渤海彊對流天氣過程進行分析。結果錶明：位于內矇東部的低渦繫統東移南壓,進入河北東部低渦有榦冷空氣侵入,槽前暖濕氣流與地麵冷鋒疊加,8：000~6 km垂直風切變躍20 m/s,K指數為33℃,SI指數為-3.8℃,14：00 CAPE達1883 J/kg,導緻彊對流天氣的髮生。同步鑑測顯示：12：00 MCS生成于北京至河北北部,雲圖中呎度象元TBB為-65~-25℃,帶狀對流雲糰彊弱交替變化為3~6 h,渤海西海岸帶彊對流最彊時段在14：00-17：00,齣現2條颮線,迴波彊度大于50 dBz,其中影響秦皇島的颮線1 h溫度下降10℃、氣壓下降2.7 hPa；19：00 MCS主體入海後斷裂,20：00-21：00在萊州灣及大連半島重新增彊。渤海西海岸帶以短時大風、冰雹為主,東海岸帶為彊降水,雷電大于8h。
이용FY-2E위성운도、천기뢰체병도、중앙태강대류축소시감측、해도참급수치모식산품등자료,대2012년9월27일12：00-20：00(CST)출현재배발해강대류천기과정진행분석。결과표명：위우내몽동부적저와계통동이남압,진입하북동부저와유간랭공기침입,조전난습기류여지면랭봉첩가,8：000~6 km수직풍절변약20 m/s,K지수위33℃,SI지수위-3.8℃,14：00 CAPE체1883 J/kg,도치강대류천기적발생。동보감측현시：12：00 MCS생성우북경지하북북부,운도중척도상원TBB위-65~-25℃,대상대류운단강약교체변화위3~6 h,발해서해안대강대류최강시단재14：00-17：00,출현2조박선,회파강도대우50 dBz,기중영향진황도적박선1 h온도하강10℃、기압하강2.7 hPa；19：00 MCS주체입해후단렬,20：00-21：00재래주만급대련반도중신증강。발해서해안대이단시대풍、빙박위주,동해안대위강강수,뇌전대우8h。
Using some data and means,such as infrared cloud image of satellite FY-2E,weather radar puzzles,strong convection of NMC monitoring hourly,meteorological data on the island and numerical model products and other information,etc.,the strong convective weather process over Bohai Sea from Apr.27th in 2012,12 to 20(CST)was analyzed.The results showed that the low vortex system southeast moved in the Eastern Inner Mongolia,then it took in Hebei Province,with dry and cold intrusion,and front pocket of warm air and surface cold front overlay .As to the index changing,the value of vertical wind shear(between 0 km and 6 km)was greater than 20m/s at 800 am,the value on K index was 33℃and SI index was-3.8℃,Cape reaches to 1 883 J/kg at 200 pm.these factors resulted to turning out the severe convective weather.At the same time,the monitoring showed the MCS pixels was produced into Beijing and the northern of Hebei at 1200 am,dynamic feature of it on synchronous satellite cloud image and the value of TBB was-65~-25℃,The strength of convective clouds banded was alternating from 3 hours to 6 hours,The strongest periods of severe convective weather in the West Coast of Bohai Sea was during 200 pm to 1700 pm.When it appeared two squall lines,radar echo intensity was greater than 50 dBz.Between them,the temperature of the squall line which impacted Qinhuangdao dropped 10℃in 1 hour,and the pressure dropped 2.7 hPa;The main body of MCS broken after it got into the sea in the 700 pm,and it re-strengthened in the Laizhou Bay and Dalian Peninsula from 800 pm to 900 pm.The West Coast of Bohai Sea met temporary strong wind and hail,and the East Coast met heavy precipitation and the thunder over 8 hours.
