THE TRIGGERING EFFECT OF NEAR-EQUATORIAL CYCLONES ON EL NI?O

Gao Shiying; Wang Jingshu; Ding Yihui

doi:10.1007/BF02657349

Impact Factor: 5.8

Volume 5 Issue 1

Jan. 1988

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1988 > 5(1): 87-96

THE TRIGGERING EFFECT OF NEAR-EQUATORIAL CYCLONES ON EL NI?O

1.
National Research Center for Environmental Forecasts, State Oceanic Administration, Beijing,National Research Center for Environmental Forecasts, State Oceanic Administration, Beijing,National Research Center for Environmental Forecasts, State Oceanic Administration, Beijing

doi: 10.1007/BF02657349

Abstract
References
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Abstract:
The relationship between tropical cyclones developing in the Northwest Pacific and El Ni?o is analysed and the triggering mechanism of the near-equatorial cyclones on El Ni?o is proposed. It is pointed out that the near-equalorial tropical cyclones developing equatorward of 10oN can intensify equatorial westerlies and produce Kelvin waves, which propagate to the South American Coasts in about 2-3 months, inducing SST to rise there. The near-equatoral cyclones play an essential role in El Ni?o. The beginning period of El Ni?o ranges from January to May. The number of near-equatorial cyclones developing in this period determines whether El Ni?o can be generated or not. The persistence period is from June to September. El Ni?o can not continue developing unless there are adequate near-equatorial cyclones. If there are not, the developed El Ni?o will be broken down. The period from October to December is called the developing period. During this period El Ni?o may approach its culmination only when adequate near-eqatorial cyclones have been developed east of 140oE, especially east of 160oE.
References

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Manuscript History

Manuscript received: 10 January 1988

Manuscript revised: 10 January 1988

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

THE TRIGGERING EFFECT OF NEAR-EQUATORIAL CYCLONES ON EL NI?O

1. National Research Center for Environmental Forecasts, State Oceanic Administration, Beijing,National Research Center for Environmental Forecasts, State Oceanic Administration, Beijing,National Research Center for Environmental Forecasts, State Oceanic Administration, Beijing

Manuscript received: 1988-01-10
Manuscript revised: 1988-01-10

Abstract: The relationship between tropical cyclones developing in the Northwest Pacific and El Ni?o is analysed and the triggering mechanism of the near-equatorial cyclones on El Ni?o is proposed. It is pointed out that the near-equalorial tropical cyclones developing equatorward of 10oN can intensify equatorial westerlies and produce Kelvin waves, which propagate to the South American Coasts in about 2-3 months, inducing SST to rise there. The near-equatoral cyclones play an essential role in El Ni?o. The beginning period of El Ni?o ranges from January to May. The number of near-equatorial cyclones developing in this period determines whether El Ni?o can be generated or not. The persistence period is from June to September. El Ni?o can not continue developing unless there are adequate near-equatorial cyclones. If there are not, the developed El Ni?o will be broken down. The period from October to December is called the developing period. During this period El Ni?o may approach its culmination only when adequate near-eqatorial cyclones have been developed east of 140oE, especially east of 160oE.