The western Pacific subtropical high and tropical cyclone landfall: Seasonal forecasts using the Met Office GloSea5 system
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
We investigate the relationship between the western Pacific subtropical high (WPSH) and tropical cyclone (TC) landfall in the ERA‐Interim reanalysis and two configurations of the UK Met Office Global Seasonal forecasting system version 5 (GloSea5): Global Atmosphere 3.0 (GA3) and Global Coupled configuration 2 (GC2). Both model configurations have the same horizontal and vertical resolution in the ocean and the atmosphere, but differ in terms of model physics. The WPSH strongly modulates TC activity over the subtropical western North Pacific (WNP) and TC landfall over East Asia (Japan, Korea and East China). Here we show that both model configurations GA3 and GC2 show significant skill for predictions of the WPSH and TC variability over the subtropical WNP, as well as TC frequency along the coast of East Asia, during the boreal summer (June–August). An extension of the analysis to include the full WNP typhoon season (June–November) is also examined; however, only a weak significant relationship between the WPSH index and the observed TC frequency over East Asia is found during this period, and no significant relationship is present in either GloSea5 GA3 or GC2. Results highlight the potential for operational seasonal forecasts of TC landfall risk for Japan, Korea and East China over the June–August period using predictions of the WPSH indices from GloSea5.
Date Issued
2019-01-01
Date Acceptance
2018-09-08
Citation
Quarterly Journal of the Royal Meteorological Society, 2019, 145 (718), pp.105-116
ISSN
0035-9009
Publisher
Wiley
Start Page
105
End Page
116
Journal / Book Title
Quarterly Journal of the Royal Meteorological Society
Volume
145
Issue
718
Copyright Statement
© 2018 Crown copyright. Quarterly Journal of the Royal Meteorological Society © 2018 Royal Meteorological Society
Sponsor
Met Office
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000459863300008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
P100212
Subjects
Science & Technology
Physical Sciences
Meteorology & Atmospheric Sciences
East Asia
ensembles
landfall
seasonal forecasting
tropical cyclones
western Pacific
NORTH PACIFIC
INTERANNUAL VARIABILITY
EAST-ASIA
PREDICTION
CHINA
CLIMATE
FREQUENCY
MONSOON
MODEL
TELECONNECTION
Publication Status
Published
Date Publish Online
2018-09-28