Document Type

Article

Publication Version

Published Version

Publication Date

2004

Journal or Book Title

Weather and Forecasting

Volume

19

Issue

4

First Page

776

Last Page

785

DOI

10.1175/1520-0434(2004)019<0776:ROTMGI>2.0.CO;2

Abstract

The south-southeast periphery of a monsoon gyre in the western North Pacific (WNP) is a favorable region for tropical cyclone/tropical depression (TC/TD) genesis. The TC genesis frequency is interannually modulated by the WNP monsoon circulation in response to a change in tropical Pacific sea surface temperature (SST). These findings from previous studies lead to the hypothesis that the effect of tropical Pacific SST changes on the WNP TC/TD genesis frequency is accomplished through a modulation of the monsoon gyre activity by WNP monsoon circulation variations. The 6-h TC/TD track records and NCEP–NCAR reanalysis data for the period of 1979–2002 were analyzed to test this hypothesis. Results show that roughly 70% of WNP TC/TD geneses are linked to monsoon gyres. The interannual variation of these geneses is highly correlated (with a correlation coefficient of 0.89) with that of monsoon gyre activity, which is out-of-phase with the interannual variation of SST over the NOAA Nino-3 region.

Comments

This article is from Weather and Forecasting 19 (2004): 776, doi: 10.1175/1520-0434(2004)019<0776:ROTMGI>2.0.CO;2. Posted with permission.

Copyright Owner

American Meteorological Society

Language

en

File Format

application/pdf

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