文章摘要
郑州“7.20”极端暴雨的水汽输送特征分析
Analysis of water vapor transport characteristics of July 20 Heavy rainstorm in Zhengzhou
投稿时间:2022-05-24  修订日期:2022-07-06
DOI:
中文关键词: 郑州暴雨  水汽输送  HYSPLIT  台风  水汽轨迹追踪
英文关键词: Rainstorm in Zhengzhou  Water vapor transport  HYSPLIT  typhoon  Water vapor trajectory tracking
基金项目:国家重点研发计划项目
作者单位邮编
于腾飞 中国海洋大学海洋与大气学院 266100
李春 中国海洋大学海洋与大气学院、中国海洋大学物理海洋教育部重点实验室 266100
石剑 中国海洋大学海洋与大气学院 266100
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中文摘要:
   在亚洲中高纬度“两槽一脊”的稳定环流形势下,西北太平洋副热带高压和台风“烟花”、“查帕卡”等共同作用,引导水汽在郑州地区辐合,导致2021年7月19—21日郑州地区出现了降水极值超过800 mm的罕见极端暴雨(“7.20”极端暴雨),造成重大人员伤亡和财产损失。针对这次郑州“7.20”极端暴雨过程,采用HYSPLIT模式追踪其水汽来源和输送特征。结果表明:郑州“7.20”极端暴雨的水汽主要来自北太平洋西部和南海北部,分别受西北太平洋副热带高压和台风“烟花”的共同作用和受台风“查帕卡”和“烟花”的共同作用。水汽主要在850 hPa以下高度输送,而来自南海北部的水汽在向北输送的过程中逐渐抬升,临近郑州地区时接近700 hPa。基于HYSPLIT后向追踪的水汽轨迹进行定量计算,得到来自北太平洋西部和南海北部的水汽贡献分别约占73%和27%。
英文摘要:
   Under the stable circulation situation in the middle and high latitudes of Asia, the Northwest Pacific subtropical high and typhoon" In-fa " and "Cempaka" guide the convergence of water vapor in Zhengzhou, resulting in the occurrence of a rare extreme rainstorm (July 20 Heavy rainstorm in Zhengzhou) of more than 800mm in Zhengzhou, Henan Province from July 19 to 21, 2021, causing heavy casualties and property losses. For this extreme rainstorm process, the HYSPLIT model is used to track its water vapor source and transport characteristics. The results show that the water vapor of the July 20 Heavy rainstorm in Zhengzhou mainly comes from the west of the North Pacific and the north of the South China Sea, which are affected by the joint action of the Northwest Pacific subtropical high and typhoon "In-fa" and the synergistic effect of Typhoon " Cempaka" and "In-fa" respectively. The water vapor is mainly transported at a height below 850hPa, while the water vapor from the north of the South China Sea rises gradually in the process of northward transportation, and is close to 700hPa near Zhengzhou. Based on the quantitative calculation of the water vapor trajectory tracked by HYSPLIT, it is found that the water vapor contributions from the western North Pacific and the northern South China Sea account for about 73% and 27% respectively.
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