廬山臺(tái)風(fēng)暴雨天氣系統(tǒng)配置與云型分析

doi:10.3969/2012jms.0036

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廬山臺(tái)風(fēng)暴雨天氣系統(tǒng)配置與云型分析
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                        10.3969/2012jms.0036
                    
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基金項(xiàng)目:江西省自然科學(xué)基金(2009GQS0014);中國(guó)氣象科學(xué)研究院災(zāi)害天氣國(guó)家重點(diǎn)實(shí)驗(yàn)室2010開放課題(2010LASW-A03);中國(guó)氣象局氣象關(guān)鍵技術(shù)集成與應(yīng)用項(xiàng)目(CMAGJ2011Z05);江西省氣象局重點(diǎn)項(xiàng)目(JXQX2010Z09)

Analyses on weather system configuration of typhoon rainstorm and cloud type in Lushan

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使用近10a以來登陸臺(tái)風(fēng)對(duì)廬山暴雨影響的歷史資料進(jìn)行分析,結(jié)果表明:(1)影響廬山的臺(tái)風(fēng)移動(dòng)路徑主要為中路,細(xì)分為中路Ⅰ型和中路Ⅱ型,其中對(duì)廬山影響最大的是中路Ⅰ型,其它登陸臺(tái)風(fēng),中心位置<25 °N或>30 °N,對(duì)廬山的影響都很小。(2)中、低層以及地面合成場(chǎng)存在一定的共性,即(32~42 °N,100~110 °E)一帶形成高壓阻擋壩,長(zhǎng)江以南地區(qū)、南海以及臺(tái)灣處于閉合低壓區(qū)內(nèi)。這種配置是廬山臺(tái)風(fēng)暴雨常見的天氣系統(tǒng)配置類型。(3)廬山地形對(duì)臺(tái)風(fēng)降水的增幅作用十分明顯。(4)廬山臺(tái)風(fēng)暴雨主要有3種云型:①臺(tái)風(fēng)外圍環(huán)流云型;②臺(tái)風(fēng)螺旋雨帶云型;③臺(tái)風(fēng)低壓(槽)云型。這3種云型表明了臺(tái)風(fēng)3個(gè)不同階段的特征,廬山臺(tái)風(fēng)暴雨主要與西風(fēng)帶系統(tǒng)和副熱帶高壓阻隔作用、渦旋Rossby波激發(fā)的螺旋雨帶、中尺度對(duì)流云團(tuán)發(fā)展以及低層西南暖濕低空急流等因素有關(guān)。

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Historical data of Lushan precipitation due to the landed typhoon in the last 10 years are analyzed, the results are as follows. (1) The typhoon moving paths impacting on the Lushan can be divided into Middle RoadⅠ and Ⅱ types, the former influences are the greatest, other landed typhoons whose central location is less than 25 °N or greater than 30 °N have very small effects on the Lushan. (2) There are a number of common features in the mid-, lower-and ground synthetic field, namely, high pressure extends westward to an area (32-42 °N,100-110 °E) and forms the high-pressure blocking dam, the south area of the Yangtze River, the South China Sea and Taiwan are in a closed low pressure region, which is a common type of weather system configuration in the course of Lushan typhoon storms. (3) The precipitation increase due to impact of Lushan terrain on typhoons is very obvious. (4) Typhoon rains in Lushan belong to three cloud types, including ①circular cloud type of peripheral typhoon, ②cloud type of typhoon spiral rainbelt, ③typhoon low pressure (trough) type. The cloud types are caused in three different typhoon stages, the typhoon rainstorms are related with the westerly system and the subtropical high barriers, the spiral rainbelt is triggered by vortex Rossby wave, mesoscale convective cloud development and the warm and moist low-level southwest jet and other factors.

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葉小峰,馬中元,馬曉琳,黃水林,肖云.廬山臺(tái)風(fēng)暴雨天氣系統(tǒng)配置與云型分析.氣象科學(xué),2012,32(5):580-586 YE Xiaofeng, MA Zhongyuan, MA Xiaolin, HUANG Shuilin, XIAO Yun. Analyses on weather system configuration of typhoon rainstorm and cloud type in Lushan. Journal of the Meteorological Sciences,2012,32(5):580-586

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收稿日期:2011-02-12
最后修改日期:2012-05-10
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在線發(fā)布日期: 2012-10-24
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