2017年江西汛期設(shè)區(qū)市城區(qū)暴雨回波特征分析

doi:10.3969/2018jms.0081

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2017年江西汛期設(shè)區(qū)市城區(qū)暴雨回波特征分析
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                        10.3969/2018jms.0081
                    
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中圖分類號:P412.25
基金項目:江西省科技廳科技支撐計劃項目（20152ACG70002）；中國氣象局氣象預(yù)報業(yè)務(wù)關(guān)鍵技術(shù)發(fā)展專項（YBGJXM（2017）03-07）

Analysis on characteristics of rainstorm echo in flood season districts and cities of Jiangxi Province in 2017

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使用江西WebGIS雷達(dá)拼圖和自動站雨量、雷電監(jiān)測、強天氣監(jiān)測等數(shù)據(jù)，以及MICAPS常規(guī)天氣圖資料，對2017年3-7月江西汛期11個設(shè)區(qū)市26次城區(qū)暴雨過程的雷達(dá)回波特征進行分析。結(jié)果表明：2017年江西汛期共出現(xiàn)52日暴雨過程，其中江西11個設(shè)區(qū)市所在地城區(qū)出現(xiàn)26次暴雨。在這26次城區(qū)暴雨個例中，有23次伴隨出現(xiàn)短時強降水，有3次降水比較均勻。暴雨維持時間長短不一，最長的有15 h，最短只有3 h，平均是10 h。有5次出現(xiàn)大風(fēng)天氣，21次沒有大風(fēng)出現(xiàn)。雷達(dá)回波特征主要有3種：塊狀（強單體、超級單體）、帶狀（颮線、回波帶）、絮狀（絮帶、絮團）。這3種回波形態(tài)特征，出現(xiàn)率最高的是絮狀回波，即比較寬、嵌有中等強度的對流單體絮帶狀回波帶，強度40~55 dBz，出現(xiàn)16次，概率62%；其次是窄而長、緊密排列由強單體組成的颮線回波帶，強度50~60 dBz，出現(xiàn)8次，概率30%；塊狀（強單體、超級單體）回波強度最強，中心強度達(dá)到60~70 dBz，出現(xiàn)2次，概率8%。

Abstract:

Using the data of Jiangxi WebGIS radar mosaic, automatic station rainfall, lightning monitoring, severe weather monitoring and MICAPS conventional weather map data, this paper analyzes the radar echo characteristics of 26 rainstorm processes in 11 districts and cities in Jiangxi during the flood season from March to July, 2017. The results show that there are 52 rainstorm processes in the flood season of Jiangxi in 2017, among which 26 rainstorm processes occur in the urban areas of 11 districts and cities. Twenty-three out of twenty-six rainstorm processes in urban area are accompanied by short-term strong precipitation and 3 were accompanied by relatively uniform precipitation. The rainstorm duration ovaries, with the longest lasting 15 hours and the shortest lasting 3 hours, averaging 10 hours. Strong wind occurred for five times. There are mainly three kinds of radar echo characteristics:blocky (strong monomer, super monomer), banded (squall line, echo band), flocculent (flocculent band, flocculent dough). The flocculent echo occurs most frequently among the three echo characteristics, The flocculent echo is a wide echo band embedded with convective monomer with moderate intensity of 40-55 dBz, appearing 16 times, with a probability of 62%. It is followed by a squall line echo band, which is narrow, long and closely arranged and composed of strong monomers, with an intensity ranging from 50 dBz to 60 dBz, appearing eight times with a probability of 30%. Blocky (strong monomer, super monomer) echo has the strongest intensity, with the center intensity reaching 60-70 dBz, appearing twice, with a probability of 8%.

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鄧虹霞,智海,馬中元,張瑛,何文.2017年江西汛期設(shè)區(qū)市城區(qū)暴雨回波特征分析.氣象科學(xué),2019,39(2):274-284 DENG Hongxia, ZHI Hai, MA Zhongyuan, ZHANG Ying, HE Wen. Analysis on characteristics of rainstorm echo in flood season districts and cities of Jiangxi Province in 2017. Journal of the Meteorological Sciences,2019,39(2):274-284

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收稿日期:2018-05-17
最后修改日期:2018-08-15
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在線發(fā)布日期: 2019-06-01
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