Boundary layer profile of decaying and non-decaying tropical storms near landfall
Author(s)
Tsui, Enoch Yan Lok
Chan, Pak Wai
Toumi, Ralf
Type
Journal Article
Abstract
The vertical profile of the wind structure of translating tropical cyclones, including the associated azimuthal asymmetry, has been the subject of existing theoretical and observational studies using dropsondes. Most of these studies are based on data collected from relatively strong cyclones over the Atlantic. Here we explore the tropical cyclone boundary layer wind profile of mainly relatively weak landfalling cyclones near Hong Kong. We find that decaying tropical storms have a much larger mid- to low-level inflow angle than those that are intensifying or in steady-state. The inflow angles of intensifying, steady-state and decaying tropical storms converge towards the top of the boundary layer. The wind speed reduces through the boundary layer in a similar way in all three cases. The combination of these factors means that decaying tropical storms have stronger inflow than intensifying and steady-state ones. We attribute these local effects to remote enhanced surface friction over land when the storms are weakening.
Date Issued
2024-01-01
Date Acceptance
2023-08-16
Citation
Atmospheric Science Letters, 2024, 25 (1)
ISSN
1530-261X
Publisher
Wiley
Journal / Book Title
Atmospheric Science Letters
Volume
25
Issue
1
Copyright Statement
© 2023 The Authors. Atmospheric Science Letters published by John Wiley & Sons Ltd on behalf of Royal Meteorological Society.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Identifier
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001056385700001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
Subjects
ANGLE
boundary layer
CYCLONE CORE
DOPPLER PROFILER
DYNAMICS
Geochemistry & Geophysics
inflow
JETS
landfall
Meteorology & Atmospheric Sciences
Physical Sciences
Science & Technology
tropical cyclone
tropical storm
wind profile
wind profiler
Publication Status
Published
Article Number
ARTN e1189
Date Publish Online
2023-08-27