東南風(fēng)低空急流影響"21·7"鄭州市極端暴雨分析

doi:10.12306/2024jms.0005

首頁 > 過刊瀏覽>2024年第44卷第3期 >498-511. DOI:10.12306/2024jms.0005

東南風(fēng)低空急流影響"21·7"鄭州市極端暴雨分析
DOI:
                        10.12306/2024jms.0005
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡介:
通訊作者:
中圖分類號:P458.3
基金項目:國家自然科學(xué)基金資助項目(42230612;41975058;42105012);湖北省氣象局科技發(fā)展基金重點項目(2022Z02);湖北省自然科學(xué)基金資助項目(2023AFD091);中國氣象局武漢暴雨研究所基本科研業(yè)務(wù)費專項(202402)

Analysis of the impact of southeast wind low altitude jet on the "21·7" extreme heavy rain in Zhengzhou City

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問統(tǒng)計

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

資源附件

文章評論

摘要:

利用中國氣象局上海臺風(fēng)研究所熱帶氣旋(Tropical Cyclone, TC)最佳路徑數(shù)據(jù)、美國環(huán)境預(yù)報中心(National Center of Environmental Prediction, NCEP)最終分析格點資料(Final Analysis, FNL)及常規(guī)觀測數(shù)據(jù)等,分析了2021年7月鄭州極端暴雨過程的特征機(jī)理。結(jié)果表明:(1)兩個TC同時遠(yuǎn)距離輸送大量水汽,東南風(fēng)低空急流與強(qiáng)降水關(guān)系密切。當(dāng)東南風(fēng)急流北上到太原、邢臺等站后鄭州市暴雨減弱。鄭州市6 h降水超過62.5 mm站點數(shù)目增減與850 hPa地轉(zhuǎn)偏差數(shù)值變化趨勢一致。(2) 20日白天鄭州站極端降水發(fā)生前,從850 hPa經(jīng)500 hPa至200 hPa風(fēng)向從東南風(fēng)順轉(zhuǎn)為西南風(fēng)。200 hPa與850 hPa水平風(fēng)的垂直切變(Vertical Wind Shear, VWS)從最大值開始減小、可降水量(Precipitable Water Vapor, PWV)明顯加大、不穩(wěn)定程度減小,這些都是極端暴雨發(fā)生的有利條件。極端暴雨具有明顯的濕對流特點。(3)緯、經(jīng)向風(fēng)變率診斷表明,最有利于鄭州市850 hPa東風(fēng)維持的因子是地轉(zhuǎn)偏差,最有利于南風(fēng)加大的因子是動量平流。動量對流促使鄭州市暴雨過程850 hPa南風(fēng)減小,故動量上、下傳遞并非850 hPa南風(fēng)加大原因。

Abstract:

Based on the best path data of Tropical Cyclone (TC) from the Shanghai Typhoon Research Institute of the China Meteorological Administration, Final Analysis (FNL) data from the National Center of Environmental Prediction (NCEP) and the conventional observation data, the characteristic mechanism of the extreme heavy rain process in Zhengzhou in July 2021 was analyzed. Results show that: (1) two TCs simultaneously transport a large amount of water vapor over a long distance, and the relationship between the southeast low-level jet and heavy precipitation is closely related. When the southeast wind rushes northward to stations such as Taiyuan and Xingtai, the heavy rain in Zhengzhou City weakens. The variation of the number of stations with precipitation exceeding 62.5 mm in 6 hours in Zhengzhou City is consistent with the variation trend of geostrophic deviation values at 850 hPa. (2) Before the occurrence of extreme precipitation at Zhengzhou station on 20 July, the wind direction changed from southeast to southwest from 850 hPa to 500 hPa and then to 200 hPa. The Vertical Wind Shear (VWS) of horizontal winds at 200 hPa and 850 hPa decreases from its maximum value, the Precipitable Water Vapor (PWV) increases significantly, and the degree of instability decreases, which are favorable conditions for the occurrence of extreme heavy rain. Extreme rainstorm was produced by moisture convection. (3) The diagnosis of latitude and longitude wind variability indicates that the most favorable factor for maintaining 850 hPa easterly winds in Zhengzhou City is geostrophic deviation. The most favorable factor for increasing southerly winds is momentum advection. Momentum convection promotes a decrease of southerly wind at 850 hPa during the heavy rain process in Zhengzhou, so the transfer of momentum up and down is not the reason for the southerly wind increase at 850 hPa.

參考文獻(xiàn)

相似文獻(xiàn)

引證文獻(xiàn)

引用本文

張端禹,崔春光,王曉芳,唐永蘭,李山山.東南風(fēng)低空急流影響"21·7"鄭州市極端暴雨分析.氣象科學(xué),2024,44(3):498-511 ZHANG Duanyu, CUI Chunguang, WANG Xiaofang, TANG Yonglan, LI Shanshan. Analysis of the impact of southeast wind low altitude jet on the "21·7" extreme heavy rain in Zhengzhou City. Journal of the Meteorological Sciences,2024,44(3):498-511

復(fù)制

文章指標(biāo)

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

歷史

收稿日期:2023-09-26
最后修改日期:2023-12-25
錄用日期:
在線發(fā)布日期: 2024-07-16
出版日期:

文章二維碼

您是第位訪問者
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

<sup id="bxe4d"></sup>

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