皖北一次特大暴雨過(guò)程中邊界層急流日變化特征 及其對(duì)暴雨形成的影響分析

doi:10.12306/2022jms.0051

首頁(yè) > 過(guò)刊瀏覽>2022年第42卷第5期 >591-601. DOI:10.12306/2022jms.0051

皖北一次特大暴雨過(guò)程中邊界層急流日變化特征 及其對(duì)暴雨形成的影響分析
DOI:
                        10.12306/2022jms.0051
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡(jiǎn)介:
通訊作者:
中圖分類號(hào):P442;P458.3
基金項(xiàng)目:氣象預(yù)報(bào)業(yè)務(wù)關(guān)鍵技術(shù)發(fā)展專項(xiàng)(YBGJXM(2020)2A-09);安徽省重點(diǎn)研究開發(fā)項(xiàng)目(2022h11020002);安徽省教育廳重點(diǎn)項(xiàng)目(KJ2021A1079)

Analysis of diurnal variation characteristics of the boundary layer jet during an extremely heavy rainstorm in northern Anhui and its impact on rainstorm formation

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問(wèn)統(tǒng)計(jì)

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

資源附件

文章評(píng)論

摘要:

利用多普勒雷達(dá)風(fēng)廓線產(chǎn)品、ERA5再分析資料和WRF模式,分析了2018年6月27日皖北一次特大暴雨過(guò)程中邊界層急流的日變化特征及其對(duì)特大暴雨形成的作用。結(jié)果表明:特大暴雨發(fā)生期間存在邊界層急流,急流最強(qiáng)達(dá)到了18 m·s^-1,強(qiáng)降水主要發(fā)生在急流快速增強(qiáng)的時(shí)段;急流前部的邊界層輻合線是對(duì)流的觸發(fā)因子,強(qiáng)降水落區(qū)位于急流核前部。急流為對(duì)流系統(tǒng)加強(qiáng)提供水汽和能量,且邊界層急流和雷暴高壓對(duì)峙使對(duì)流系統(tǒng)穩(wěn)定少動(dòng),在對(duì)流系統(tǒng)西側(cè)激發(fā)新的對(duì)流單體,有利于特大暴雨的發(fā)生;此次過(guò)程中天氣系統(tǒng)的影響時(shí)間主要決定了強(qiáng)降水的落區(qū),而邊界層急流的日變化決定了強(qiáng)降水發(fā)生的時(shí)間段;邊界層急流在夜間具有超地轉(zhuǎn)特征,午后具有次地轉(zhuǎn)特征,地轉(zhuǎn)偏差和水平平流作用是導(dǎo)致夜間邊界層急流增強(qiáng)的主要原因。

Abstract:

Based on Doppler radar wind profile products, ERA5 reanalysis data and WRF model simulations,an extremely heavy rainstorm occurred on the night of June 27, 2018 in northern Anhui were analyzed. The diurnal variation characteristics of the boundary layer jet during the rainstorm and its impact on rainstorm formation are investigated. During the heavy rainstorm, a boundary layer jet with a maximum wind speed of 18 m·s^-1 is observed. Heavy rainfall mainly occurs along with the rapid intensification of the jet. The convection can be triggered by the boundary layer convergence line at the front of the jet core where the heavy rainfall appears, and the boundary layer jet can provide moisture and energy for the strengthening of the convective system. Besides, the confrontation between the boundary layer jet and thunderstorm high makes the convective system more stable, and this situation favors the continuously triggering of convective cells to the west, which is conducive to the occurrence of heavy rainfall. During this rainstorm, the precipitation area is mainly determined by the influence time of the weather system, while the time of precipitation occurrence is determined by the diurnal variation of the boundary layer jet. The boundary layer jet exhibits a super-geostrophic feature in the night and sub-geostrophic feature in the afternoon, andthe enhancement of the boundary layer jet in the night can attribute to geostrophic departure and associated horizontal advections.

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

引用本文

劉高平,劉俏,邱學(xué)興,陶瑋,周曉曄,楊祖祥.皖北一次特大暴雨過(guò)程中邊界層急流日變化特征及其對(duì)暴雨形成的影響分析.氣象科學(xué),2022,42(5):591-601 LIU Gaoping, LIU Qiao, QIU Xuexing, TAO Wei, ZHOU Xiaoye, YANG Zuxiang. Analysis of diurnal variation characteristics of the boundary layer jet during an extremely heavy rainstorm in northern Anhui and its impact on rainstorm formation. Journal of the Meteorological Sciences,2022,42(5):591-601

復(fù)制

文章指標(biāo)

點(diǎn)擊次數(shù):
下載次數(shù):
HTML閱讀次數(shù):
引用次數(shù):

歷史

收稿日期:2022-01-29
最后修改日期:2022-05-20
錄用日期:
在線發(fā)布日期: 2022-11-03
出版日期:

文章二維碼

您是第位訪問(wèn)者
氣象科學(xué) ® 2026 版權(quán)所有
技術(shù)支持：北京勤云科技發(fā)展有限公司

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒 激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说

引用本文

分享

相關(guān)視頻

文章指標(biāo)

歷史

文章二維碼

抽查舔水白紧大视频,冲喜娘子超甜哒激情五月,亚洲黄色图片偷拍网站,亚洲三级黄片免费播放,91在线观看喷潮红桃,日韩精品在线观看一区二区,久久久久久久久久久久黄色片子,日产精品99久久久久久久久,欧洲亚洲另类图片小说