Modulation of western North Pacific tropical cyclone activity by the Atlantic Meridional Mode

Zhang, Wei; Vecchi, Gabriel A.; Villarini, Gabriele; Murakami, Hiroyuki; Rosati, Anthony; Yang, Xiaosong; Jia, Liwei; Zeng, Fanrong

doi:10.1007/s00382-016-3099-2

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Modulation of western North Pacific tropical cyclone activity by the Atlantic Meridional Mode

2016
By Zhang, Wei ; Vecchi, Gabriel A. ; Villarini, Gabriele ; ...
Source: Climate Dynamics, 48(1-2), 631-647

[PDF-2.47 MB]

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Journal Title:

Climate Dynamics
Personal Author:

Zhang, Wei ; Vecchi, Gabriel A. ; Villarini, Gabriele ; Murakami, Hiroyuki ; Rosati, Anthony ; ... More +

Zhang, Wei ; Vecchi, Gabriel A. ; Villarini, Gabriele ; Murakami, Hiroyuki ; Rosati, Anthony ; Yang, Xiaosong ; Jia, Liwei ; Zeng, Fanrong Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; GFDL (Geophysical Fluid Dynamics Laboratory)

OAR (Oceanic and Atmospheric Research) ; GFDL (Geophysical Fluid Dynamics Laboratory) Less -
Description:

This study examines the year-to-year modulation of the western North Pacific (WNP) tropical cyclones (TC) activity by the Atlantic Meridional Mode (AMM) using both observations and the Geophysical Fluid Dynamics Laboratory Forecast-oriented Low Ocean Resolution Version of CM2.5 (FLOR) global coupled model. 1. The positive (negative) AMM phase suppresses (enhances) WNP TC activity in observations. The anomalous occurrence of WNP TCs results mainly from changes in TC genesis in the southeastern part of the WNP. 2. The observed responses of WNP TC activity to the AMM are connected to the anomalous zonal vertical wind shear (ZVWS) caused by AMM-induced changes to the Walker circulation. During the positive AMM phase, the warming in the North Atlantic induces strong descending flow in the tropical eastern and central Pacific, which intensifies the Walker cell in the WNP. The intensified Walker cell is responsible for the suppressed (enhanced) TC genesis in the eastern (western) part of the WNP by strengthening (weakening) ZVWS. 3. The observed WNPTC–AMM linkage is examined by the long-term control and idealized perturbations experiment with FLOR-FA. A suite of sensitivity experiments strongly corroborate the observed WNPTC–AMM linkage and underlying physical mechanisms.
Source:

Climate Dynamics, 48(1-2), 631-647
DOI:

https://doi.org/10.1007/s00382-016-3099-2
ISSN:

0930-7575;1432-0894;
Format:

PDF
Publisher:

Springer Science and Business Media LLC
Document Type:

Journal Article
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Accepted Manuscript
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Submitted
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urn:sha-512:c075b83dfbde178ea3d2d31daf226742bc33d39d2a95564a615121b889c9c1d388b171d20a182defecd32d12eb856383f3dc88736a8b5c56c6e41ff95660ce21
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Modulation of western North Pacific tropical cyclone activity by the Atlantic Meridional Mode

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