典型文献
Record Flood-Producing Rainstorms of July 2021 and August 1975 in Henan of China:Comparative Synoptic Analysis Using ERA5
文献摘要:
This study compares two rainstorms that swept through Henan Province of China in July 2021 and August 1975. The heavy rainfall and related synoptic systems and processes are diagnosed based on hourly ERA5 reanalysis data and precipitation observations from the China Meteorological Administration. It is estimated that most of the daily rainfall in Henan was caused by synoptic-scale precipitation, with the sub-synoptic convective rainfall intermittently dominating some of the hourly total rainfall. The rainband moved at about 2 m s?1 during the July 2021 rainstorm, whereas it was almost stationary during the August 1975 rainstorm when the heavy rainfall was concentrated in southern Henan. A double-typhoon circulation pattern with a subtropical high over the Bohai and Yellow Seas was observed during both rainstorms. The heavy rainfall during the July 2021 event was controlled remotely by Typhoons Cempaka and In-Fa, which provided a path for the transport of moisture via the southerly jet associated with Typhoon Cempaka and the easterly (or southeasterly) jet associated with Typhoon In-Fa. The rainstorm in August 1975 was caused more directly by Typhoon Nina, which made landfall in Fujian Province and moved toward Henan Province. The rainfall around the inverted trough of the motionless Typhoon Nina produced a cumulative effect. The two rainstorms also differed in their circulation patterns in the upper troposphere. The intrusion of high potential vor-ticity air over Central China occurred in the July 2021 extreme rainstorm, whereas the South Asian high was en-hanced and biased further north during the August 1975 rainstorm. Further analysis showed that the northward and westward transport of moisture took place during the July 2021 rainstorm, whereas the westward transport of mois-ture from the east of Henan dominated near the inverted trough of Typhoon Nina during the August 1975 rainstorm.
文献关键词:
中图分类号:
作者姓名:
Jian RAO;Jin XIE;Yong CAO;Suxing ZHU;Qian LU
作者机构:
Key Laboratory of Meteorological Disaster of Ministry of Education (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044;School of Atmospheric Sciences, Nanjing University of Information Science & Technology, Nanjing 210044;National Meteorological Centre, China Meteorological Administration, Beijing 100081
文献出处:
引用格式:
[1]Jian RAO;Jin XIE;Yong CAO;Suxing ZHU;Qian LU-.Record Flood-Producing Rainstorms of July 2021 and August 1975 in Henan of China:Comparative Synoptic Analysis Using ERA5)[J].气象学报(英文版),2022(06):809-823
A类:
Rainstorms,rainband,Cempaka,motionless
B类:
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AB值:
0.470529
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