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The role of tropical Atlantic SST anomalies in modulating western North Pacific tropical cyclone genesis
Author(s) -
Huo Liwei,
Guo Pinwen,
Hameed Saji N.,
Jin Dachao
Publication year - 2015
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2015gl063184
Subject(s) - teleconnection , tropical cyclone , tropical cyclogenesis , climatology , tropical atlantic , sea surface temperature , typhoon , anomaly (physics) , oceanography , atlantic hurricane , extratropical cyclone , environmental science , geology , el niño southern oscillation , cyclone (programming language) , physics , condensed matter physics , field programmable gate array , computer science , computer hardware
The connection between north tropical Atlantic (NTA) sea surface temperature (SST) anomalies and tropical cyclone (TC) genesis over the western North Pacific (WNP) and associated physical mechanisms are investigated in this study. We demonstrate a remarkable negative correlation of WNP TC genesis frequency with the (preceding) boreal spring NTA SST anomalies. Our analysis suggests that major factors for TC genesis including distributions of large‐scale vorticity and midtropospheric humidity are rendered unfavorable by remote teleconnections while barotropic energy conversion from the large‐scale flow is suppressed. As shown in recent studies, the remote teleconnection from the Atlantic is sustained and enhanced throughout the typhoon season through local air‐sea interactions. These results suggest that boreal spring NTA SST anomaly could be a new predictor for the seasonal WNP TC activity.