近30 a影響皖北東部降水的臺風環(huán)流場研究

doi:10.3969/2018jms.0078

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近30 a影響皖北東部降水的臺風環(huán)流場研究
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                        10.3969/2018jms.0078
                    
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基金項目:安徽省氣象局預(yù)報員專項（KY201505）

A research on typhoon circulation fields affecting precipitation in the northeastern Anhui Province in recent 30 years

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分析1981-2014年7-9月影響皖北東部地區(qū)的臺風特征，統(tǒng)計不同臺風路徑和降雨量之間的關(guān)系，研究不同路徑下皖北東部出現(xiàn)暴雨的環(huán)流場特征，結(jié)果表明：（1）西北行、陸面轉(zhuǎn)向、海面轉(zhuǎn)向和其他類路徑的臺風都可以影響皖北東部，并產(chǎn)生降水。其中產(chǎn)生降水個例最多的臺風路徑為陸面轉(zhuǎn)向類，次多為西北行類。（2）臺風影響時無降水、非暴雨和暴雨3類降水個例的500 hPa平均環(huán)流場對比分析表明：當有臺風影響皖北東部時，配合西風槽或副高阻擋更有利于產(chǎn)生強降水。（3）西北行類臺風暴雨的環(huán)流場特征是華北到河套存在西南-東北走向高壓帶阻擋使臺風停滯少動；海面轉(zhuǎn)向類臺風暴雨環(huán)流場特征是河套東部存在低槽與臺風相互作用；陸面轉(zhuǎn)向類臺風暴雨環(huán)流場可以分為3類：貝湖兩槽一脊型、貝湖單槽型和副熱帶高壓阻擋型。

Abstract:

Along with analyzing the characteristics of typhoons affecting the northeastern part of Anhui Province in 7-9 months, the relationship between typhoon activity and rainfall is statistically analyzed as well. By studying the characteristics of the rainstorm circulation situations under different typhoons in the northeastern part of Anhui Province, the following results are obtained:(1) Typhoons along northwest route, land steering route, sea steering route and other paths can affect the northeastern Anhui and produce precipitation. Among them, the typhoon path with the most common precipitation cases is the land steering route, and the second is northwest route. (2) The comparative analysis of 500 hPa average circulation field of three types of precipitation, namely, no precipitation, no rainstorm and rainstorm, under the influence of typhoon shows that when typhoon affects the northeastern Anhui, the combination of westerly trough or subtropical high is more conducive to heavy precipitation. (3) The circulation field of typhoon-like torrential rain in Northwest China is characterized by the existence of a southwest-northeast high pressure zone from North China to Hetao area, which make typhoon move slowly. Typhoon-like storm circulation field with sea surface turning is characterized by low trough and typhoon interaction in the eastern part of Hetao area. The circulation fields of land steering typhoon rainstorm can be divided into three types:two troughs and one ridge in Lake Bei, Lake Bei single trough type and subtropical high barrier type.

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王蘇瑤,孫金賀,汪付華,呂森林,袁野.近30 a影響皖北東部降水的臺風環(huán)流場研究.氣象科學,2019,39(6):827-833 WANG Suyao, SUN Jinhe, WANG Fuhua, LYU Senlin, Yuanye. A research on typhoon circulation fields affecting precipitation in the northeastern Anhui Province in recent 30 years. Journal of the Meteorological Sciences,2019,39(6):827-833

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收稿日期:2018-04-10
最后修改日期:2018-09-01
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在線發(fā)布日期: 2020-01-07
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