The role of tropical Atlantic SST anomalies in modulating western North Pacific tropical cyclone genesis

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 fr...

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Bibliographic Details
Published in:Geophysical research letters 2015-04, Vol.42 (7), p.2378-2384
Main Authors: Huo, Liwei, Guo, Pinwen, Hameed, Saji N., Jin, Dachao
Format: Article
Language:English
Subjects:
Air-sea interaction
Anomalies
Barotropic mode
Correlation
Correlation analysis
Cyclones
Direct power generation
Energy
Energy conversion
Genesis
Humidity
Hurricanes
Interactions
Marine
Meteorology
north tropical Atlantic
NTA
Ocean currents
remote teleconnection
Sea surface
Sea surface temperature
Seasons
Spring
Spring (season)
Springs (elastic)
Surface temperature
Teleconnections
Temperature effects
Tropical climate
tropical cyclone genesis
Tropical cyclones
Typhoons
Vorticity
western North Pacific
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Summary: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. Key Points Spring NTA SST anomaly significantly correlates with WNP TC genesis frequency The remote teleconnection initiated from the Atlantic affects WNP TC genesis Spring NTA SST anomaly could be a new predictor for seasonal WNP TC activity
ISSN:0094-8276
1944-8007
DOI:10.1002/2015GL063184