臺(tái)風(fēng)“利奇馬”(1909)快速增強(qiáng)事件的降水演變

doi:10.3969/2019jms.0069

首頁 > 過刊瀏覽>2020年第40卷第1期 >136-142. DOI:10.3969/2019jms.0069

臺(tái)風(fēng)“利奇馬”(1909)快速增強(qiáng)事件的降水演變
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                        10.3969/2019jms.0069
                    
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中圖分類號(hào):P458.1
基金項(xiàng)目:國家自然科學(xué)基金資助項(xiàng)目（41805028；41705045；41675018）；福建氣象局新錄用研究生基層專項(xiàng)項(xiàng)目（2019G04）

Precipitation evolution during the rapid intensification event of typhoon “Lekima”(1909)

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利用臺(tái)風(fēng)路徑資料及GPM多星集合降水反演產(chǎn)品（IMERG），分析了"利奇馬"臺(tái)風(fēng)快速增強(qiáng)（RI）事件的平均降水率、降水（>0 mm·h^-1）和短時(shí)強(qiáng)降水（>20 mm·h^-1）的覆蓋率隨時(shí)間的演變。進(jìn)一步，將RI事件分為RI啟動(dòng)前0~24 h、RI啟動(dòng)期、RI持續(xù)期、RI結(jié)束前0~24 h，和RI結(jié)束后0~24 h等階段，分析平均降水率、降水和短時(shí)強(qiáng)降水發(fā)生頻率的空間分布。研究結(jié)果表明：（1）在整個(gè)RI事件中，平均降水率和短時(shí)強(qiáng)降水發(fā)生頻率較高的區(qū)域主要集中在臺(tái)風(fēng)中心西北方位，但其面積和位置隨階段轉(zhuǎn)換而變化；（2）在RI啟動(dòng)前0~24 h，降水覆蓋率的高值區(qū)由臺(tái)風(fēng)內(nèi)核逐漸擴(kuò)大至臺(tái)風(fēng)外圍，而平均降水率和短時(shí)強(qiáng)降水覆蓋率在RI啟動(dòng)后才明顯增強(qiáng)；（3）在RI啟動(dòng)前0~12 h到RI結(jié)束前0~24 h的4個(gè)階段，平均降水率和短時(shí)強(qiáng)降水發(fā)生頻率的高值區(qū)都出現(xiàn)在臺(tái)風(fēng)移動(dòng)方向的正前方。

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Based on the typhoon track data and the Integrated Multi-satellite Retrievals for GPM (IMERG), the evolution of the average precipitation rate, the coverage rates in terms of the precipitation(>0 mm·h^-1) and the short-term heavy rainfall(>20 mm·h^-1) are examined during the Rapid Intensification (RI) event of typhoon "Lekima". The RI event is divided into varied stages including a period of 0-24 h before RI starts, RI initiation, RI duration, a period of 0-24 h before RI ends, and a period of 0-24 h after RI ends, and then spatial distributions of associated precipitation parameters are shown respectively. In the RI event, the higher average precipitation rate and the higher occurrence frequency of the short-term heavy rainfall both are centrally located in the northwest direction of the typhoon center, but their positions and areas change with stages. During the period of 0-24 h before RI starts, the area with high precipitation coverage rate expands from the typhoon inner core to outside region gradually. Meanwhile, the average precipitation rate and the short-term heavy rainfall coverage rate increase significantly after the onset of RI. From the period of 0-24 h before RI starts to the period of 0-24 h before RI ends, the average precipitation rate and the short-term heavy rainfall occurrence frequency are relatively high in front of the direction of typhoon movement.

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呂巧誼,張玉軒,江慧遠(yuǎn),鄭輝,陳德花,胡雅君.臺(tái)風(fēng)“利奇馬”(1909)快速增強(qiáng)事件的降水演變.氣象科學(xué),2020,40(1):136-142 LYU Qiaoyi, ZHANG Yuxuan, JIANG Huiyuan, ZHENG Hui, CHEN Dehua, HU Yajun. Precipitation evolution during the rapid intensification event of typhoon “Lekima”(1909). Journal of the Meteorological Sciences,2020,40(1):136-142

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收稿日期:2019-09-20
最后修改日期:2019-10-21
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在線發(fā)布日期: 2020-03-16
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