Asset Details
Do you wish to reserve the book?
Case study on the formation of a torrential‐rainfall‐producing southwest vortex: Backward trajectory analyses and sensitivity simulations
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Case study on the formation of a torrential‐rainfall‐producing southwest vortex: Backward trajectory analyses and sensitivity simulations
Do you wish to request the book?
Case study on the formation of a torrential‐rainfall‐producing southwest vortex: Backward trajectory analyses and sensitivity simulations
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Case study on the formation of a torrential‐rainfall‐producing southwest vortex: Backward trajectory analyses and sensitivity simulations
2024
Overview
The southwest vortices (SWVs) are a unique type of mesoscale vortex that frequently induce torrential rainfall in China. In this study, we focused a long‐lived quasi‐stationary SWV, which was the primary system for producing an extremely heavy rainstorm within/around Sichuan (the maximum hourly precipitation was ~103.8 mm) in Mid July 2021. After reproduced the SWV's formation by using Weather Research and Forecasting model, we conducted trajectory analyses and topography sensitivity simulations to understand the effects of complicated topography on the vortex's formation. It is found that, the regions south and southwest of the SWV acted as the most important source regions for the air clusters that formed the SWV (proportion ≥ 65%), and the air clusters originated from the upper layer contributed the most (≥60%). Of these, the air clusters sourced from the upper layer southwest and south of the SWV played the most important role in the SWV's formation, as their increase in cyclonic vorticity and their contributions to trajectory number and vorticity were all much larger than those of the others. Sensitivity simulations indicated that, detailed topography features around the Sichuan Basin were crucial in determining the structure, intensity and precipitation of the SWV, whereas, the topography features were not a decisive factor for the SWV's formation. In summary, our findings are useful to enrich the current understanding of the SWVs' formation, which would be helpful to improve the related forecasts. The air particles sourced from the upper layer southwest and south of the southwest vortices (SWV) contributed the most to the SWV's formation, as their increase in cyclonic vorticity and their contributions to trajectory number and vorticity were all the largest. Although the detailed topography features were not a decisive factor for the SWV's formation, they exerted notable impacts on the structure, intensity, and precipitation of the SWV. The SWV's formation was the most sensitive to the topography south of the vortex, whereas, it was relatively insensitive to the topography southwest of the vortex.
