梅雨期持續(xù)性暴雨過(guò)程云—輻射—降水的關(guān)系

doi:10.12306/2022jms.0028

首頁(yè) > 過(guò)刊瀏覽>2024年第44卷第3期 >442-450. DOI:10.12306/2022jms.0028

梅雨期持續(xù)性暴雨過(guò)程云—輻射—降水的關(guān)系
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                        10.12306/2022jms.0028
                    
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中圖分類(lèi)號(hào):P458.121.1
基金項(xiàng)目:國(guó)家重點(diǎn)研發(fā)計(jì)劃資助項(xiàng)目(2019YFC0214604/03);國(guó)家自然科學(xué)基金面上資助項(xiàng)目(41775096;42030612);高原大氣與環(huán)境四川省重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題(PAEKL-2020-C1)

Cloud-radiation-precipitation associations over the persistent heavy rainfall events during Meiyu periods

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本文利用站點(diǎn)觀測(cè)數(shù)據(jù)以及ERA5再分析資料分析了2006—2020年14次長(zhǎng)江中下游地區(qū)梅雨期持續(xù)性暴雨的基本特征以及過(guò)程中云—輻射—降水的關(guān)系。結(jié)果表明,在梅雨期持續(xù)性暴雨過(guò)程中,降水呈緯向分布;云量分布隨高度向南傾斜,中云分布與降水分布對(duì)應(yīng)良好,高云分布在降水區(qū)南側(cè);降水發(fā)生時(shí),梅雨鋒北側(cè)中低云增加,南側(cè)高云增加,北側(cè)中低云輻射降溫以及南側(cè)高云溫室效應(yīng)和暖平流共同作用造成梅雨鋒兩側(cè)溫差增大,鋒面加強(qiáng)使得持續(xù)性暴雨得以維持。

Abstract:

This paper analyzed the basic characteristics and the cloud-radiation-precipitation associations of 14 Persistent Heavy Rainfall Events (PHREs) during 2006-2020 Meiyu periods in the middle and lower reaches of Yangtze River by using site observation data and ERA5 reanalysis data. Results show that during the PHREs of Meiyu period, it is found that the precipitation was zonally distributed; the distribution of cloud cover inclines southward with height, the distribution of medium cloud cover corresponds well to the distribution of precipitation, and the high cloud cover is distributed over the south of the rainfall area. When the precipitation started, the low and medium cloud cover increased on the north side of Meiyu front, and the high cloud cover increased on the south side of Meiyu front. The radiation cooling effect of low and medium clouds in the north and the combination of high cloud greenhouse effect and warm advection in the south made the temperature difference between the two sides of Meiyu front increased, and the strengthening of Meiyu front made heavy rainfall maintained.

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潘春曉,姚素香,夏依聰.梅雨期持續(xù)性暴雨過(guò)程云—輻射—降水的關(guān)系.氣象科學(xué),2024,44(3):442-450 PAN Chunxiao, YAO Suxiang, XIA Yicong. Cloud-radiation-precipitation associations over the persistent heavy rainfall events during Meiyu periods. Journal of the Meteorological Sciences,2024,44(3):442-450

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收稿日期:2022-01-19
最后修改日期:2022-02-24
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在線(xiàn)發(fā)布日期: 2024-07-16
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