On the seasonal and sub-seasonal factors influencing East China tropical cyclone landfall
File(s)asl.1014.pdf (2.24 MB)
Published version
Author(s)
Sparks, Nathan
Toumi, Ralf
Type
Journal Article
Abstract
To date it has proved difficult to make seasonal forecasts of tropical cyclones, particularly for landfall and in East China specifically. This study examines sources of predictability for the number of landfalling typhoons in East China on seasonal (June–October) and sub‐seasonal time scales. East China landfall count is shown to be independent of basin‐scale properties of TC tracks, such the genesis location, duration, basin track direction and length, and basin total count. Large‐scale environmental climate indices which are potential basin scale drivers are also shown to be largely uncorrelated with landfall prior to and throughout the season. The most important factor is the steering in the final stages to landfall. The seasonal landfall is strongly anti‐correlated with the more local zonal mid‐tropospheric wind field over the East China sea (r = −.61, p < .001). It is proposed that geopotential height anomalies over Korea/Japan cause anomalous easterly winds in the East China Sea and enhance landfall rates by steering typhoons onto the coast. Early, peak, and late sub‐seasonal landfall counts are shown to be independent of each other yet share this predictor. This local feature may be dynamically predictable allowing a potential hybrid dynamical‐statistical seasonal forecast of landfall.
Date Issued
2021-02-01
Date Acceptance
2020-09-27
Citation
Atmospheric Science Letters, 2021, 22 (2), pp.1-8
ISSN
1530-261X
Publisher
Wiley Open Access
Start Page
1
End Page
8
Journal / Book Title
Atmospheric Science Letters
Volume
22
Issue
2
Copyright Statement
© 2020 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
Sponsor
Met Office
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000583171200001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
P106409
Subjects
Science & Technology
Physical Sciences
Geochemistry & Geophysics
Meteorology & Atmospheric Sciences
East China
landfall
tropical cyclone
WESTERN NORTH PACIFIC
INTERANNUAL VARIABILITY
FREQUENCY
GENESIS
PREDICTIONS
LOCATION
IMPACTS
SST
Publication Status
Published
Article Number
ARTN e1014
Date Publish Online
2020-10-25