臺風(fēng)“利奇馬”不同強降水中心的雨滴譜特征分析

doi:10.3969/2019jms.0064

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臺風(fēng)“利奇馬”不同強降水中心的雨滴譜特征分析
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                        10.3969/2019jms.0064
                    
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中圖分類號:P444
基金項目:山東省自然科學(xué)基金資助項目（ZR2016DM20）；山東省氣象局預(yù)報員專項（SDYBY2018-14）；臨沂市氣象局自立課題（2019lyqx06）

Analysis of the characteristics of raindrop spectrum in different heavy precipitation centers caused by typhoon “Lekima”

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在2019年臺風(fēng)"利奇馬"臺風(fēng)暖區(qū)、臺風(fēng)與西風(fēng)槽相互作用區(qū)及西風(fēng)槽影響區(qū)分別挑選4個極端強降水中心，利用各站連續(xù)觀測分鐘雨滴譜資料和分鐘降水資料，分析了不同站點和不同降水時段的雨滴尺度譜、雨滴速度譜、雨滴尺度-時間譜和雨滴速度-時間譜特征，研究了雨滴譜特征隨時間的變化。結(jié)果表明：4個降水中心的雨滴尺度-時間譜和雨滴速度-時間譜存在明顯差異，而過程的統(tǒng)計譜特征差異不明顯；過程中不同區(qū)域的站點、同一站點不同的降水時段，雨滴尺度譜和雨滴速度譜主要為雙峰型，尺度譜雙峰中各站對應(yīng)1.2 mm直徑峰的位置一致，處于較小尺度峰的位置不一致；在較大雨強時，雨滴尺度譜上會出現(xiàn)單峰和三峰的情況，但比例較少；1.2 mm雨滴的高濃度區(qū)域與地面降水強度有非常好的對應(yīng)關(guān)系，在1.2 mm雨滴的高濃度區(qū)域形成的過程中，地面降水逐漸增強，隨著1.2 mm雨滴的高濃度區(qū)域逐漸瓦解，地面降水逐漸減弱，直至出現(xiàn)間歇。

Abstract:

In 2019, typhoon "Lekima", four extreme precipitation centers were selected respectively in the typhoon warm zone, affected area of westerly trough, typhoon and westerly trough interaction zone. With the raindrop spectrum data and minute precipitation data which were continuously observed by each station, the characteristics of raindrop scale spectrum, raindrop velocity spectrum and raindrop scale-time of different stations and different precipitation periods were analyzed, as well as changes in raindrop spectral characteristics over time. The results showed that there were obvious differences in raindrop scale-time spectrum and raindrop velocity-time spectrum of the four precipitation centers, but the statistical spectrum characteristics of the process were not obvious. During the process, the raindrop scale spectrum and raindrop velocity spectrum were mainly bimodal in the different regions and different precipitation periods. The peak positions of the raindrops corresponding to 1.2 mm in the double peaks were consistent, and the peaks in the smaller scale were different. When the rain was heavy, single peaks or three peaks would appear in the raindrop scale spectrum, but the proportion was small. The high concentration area of 1.2 mm raindrops had a very good correspondence with the ground precipitation intensity. In the process of forming a high concentration area of 1.2 mm raindrops, the ground precipitation gradually increased, and the high concentration area of 1.2 mm raindrops gradually disintegrated, the ground precipitation gradually weakened until intermission occurred.

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申高航,高安春,李君.臺風(fēng)“利奇馬”不同強降水中心的雨滴譜特征分析.氣象科學(xué),2020,40(1):106-113 SHEN Gaohang, GAO Anchun, LI Jun. Analysis of the characteristics of raindrop spectrum in different heavy precipitation centers caused by typhoon “Lekima”. Journal of the Meteorological Sciences,2020,40(1):106-113

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收稿日期:2019-09-19
最后修改日期:2019-11-03
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在線發(fā)布日期: 2020-03-16
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