江蘇一次梅雨期疑似龍卷現(xiàn)場調(diào)查報告

doi:10.3969/2020jms.0019

首頁 > 過刊瀏覽>2020年第40卷第4期 >546-553. DOI:10.3969/2020jms.0019

江蘇一次梅雨期疑似龍卷現(xiàn)場調(diào)查報告
DOI:
                        10.3969/2020jms.0019
                    
CSTR:
                        
                    
作者:
                        
                        
                    
作者單位:
作者簡介:
通訊作者:
中圖分類號:P458.123
基金項目:江蘇省"333工程"科研項目（BRA17521）；中國氣象局預報員專項（CMAYBY2018-029）；重大自然災害監(jiān)測預警與防范（2018YFC1507503）

Survey report on a doubtful tornado during the Meiyu period in Jiangsu Province

Author:

Affiliation:

Fund Project:

摘要

圖/表

訪問統(tǒng)計

參考文獻

相似文獻

引證文獻

資源附件

文章評論

摘要:

利用現(xiàn)場調(diào)查資料，結(jié)合多普勒天氣雷達、自動氣象站、閃電定位資料，對2019年6月29日發(fā)生在寶應縣的一次風災過程的強風類型和風災強度進行評估。結(jié)果表明：（1）本次被大風損壞的物體倒伏方向比較一致，沒有輻合狀特征，碎片散落范圍較小，符合直線型雷暴大風特征物的分布特征。從瓦片碎片分布和樹木折斷后倒伏的方向判斷，地面大風的風向主要為西南或偏南。對照EF等級標準估計產(chǎn)生風災時短時陣風最大風力為11級左右。（2）6月29日02時，地面氣旋從金湖進入寶應后向東偏北方向移動，在低壓中心附近由于氣壓梯度力產(chǎn)生了極大風速4~6級的旋轉(zhuǎn)風，風速較大的區(qū)域位于低壓中心南側(cè)，風向為西南風。閃電監(jiān)測資料顯示當時寶應境內(nèi)雷電活動較弱，表明與之對應的對流風暴強度較弱，達不到形成龍卷風所需要的對流強度。（3）雷達資料分析表明該對流單體不具備超級單體回波結(jié)構(gòu)特征，徑向速度也沒有識別出中氣旋和TVS。中層的徑向速度大值區(qū)下傳，在近地面產(chǎn)生強輻散氣流疊加在氣旋中心南側(cè)西南風上，增大了地面風速，因此，此次風災是由氣旋中心南側(cè)西南風與小尺度對流風暴導致的下沉出流疊加所形成的強風造成的。

Abstract:

By using on-site survey data, combined with Doppler weather radar, automatic weather station, and lightning data, the wind type and wind intensity of wind damage occurred in Baoying County on June 29, 2019 were analyzed. The results show that: (1) the objects damaged by the strong wind were distributed in the same direction, with no sign of wind convergence, and the fragment scattering range was small, which was consistent with the distribution characteristics of linear thunderstorm gale features. Judging from the distribution of tile fragments and the direction of the broken trees, the wind direction of the ground strong wind was southwest or south. When the wind damage occurred, the highest intensity of gusts was about violent storms according to the EF grade standard. (2) At 02:00 BST of June 29, the surface cyclone moved northward from Jinhu to Baoying. Due to the pressure gradient force, a rotating wind with a maximum wind speed of 4—6 grade was generated in the vicinity of the low-pressure center. The maximal wind was located on the south side of the low-pressure center and the wind direction was southwest. The lightning data showed that the lightning activity in Baoying was weak during the time of the wind damage occurred, indicating that the corresponding convective storm intensity was weak and could not generate a tornado. (3) Radar data analysis shows that the convective monomer does not have the super-cell echo structure, and the radial velocity map does not recognize the medium cyclone and TVS. The radial velocity showed that a jet stream appeared in the middle layer, and the strong divergent airflow was superimposed on the southwest wind on the south side of the cyclone center, which increased the surface wind speed. Therefore, the wind damage was caused by the strong wind formed by the superposition of the sinking and outflow caused by the convective storm southwest wind and the Barometric gradient wind caused by the cyclone.

參考文獻

相似文獻

引證文獻

引用本文

王嘯華,黃榮,李楊,沈陽,慕瑞琪.江蘇一次梅雨期疑似龍卷現(xiàn)場調(diào)查報告.氣象科學,2020,40(4):546-553 WANG Xiaohua, HUANG Rong, LI Yang, SHEN Yang, MU Ruiqi. Survey report on a doubtful tornado during the Meiyu period in Jiangsu Province. Journal of the Meteorological Sciences,2020,40(4):546-553

復制

文章指標

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:2019-11-08
最后修改日期:
錄用日期:
在線發(fā)布日期: 2020-09-04
出版日期:

文章二維碼

您是第位訪問者
氣象科學 ® 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

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

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