Activities of Low-Frequency Waves in the Tropical Atmosphere and ENSO

Li Guitong; Li Chongyin

doi:10.1007/s00376-998-0039-z

Impact Factor: 5.8

Volume 15 Issue 2

Apr. 1998

Article Contents

Article > ADVANCES IN ATMOSPHERIC SCIENCES > 1998 > 15(2): 193-203

Activities of Low-Frequency Waves in the Tropical Atmosphere and ENSO

1.
LASG, Institute of Atmospheric Physics, CAS, Beijing 100080,LASG, Institute of Atmospheric Physics, CAS, Beijing 100080

doi: 10.1007/s00376-998-0039-z

Abstract
References
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Abstract:
ENSO, particularly the occurrence of ENSO is still an important research object in climatic variation. Using the ECMWF data, the relationship between ENSO and the activities of low-frequency waves in the tropical atmosphere is analyzed in this paper. It is shown that the occurrence of ENSO is closely related to the intraseasonal oscillation and the quasi-stationary waves (the period > 90 days) in the tropical atmosphere. Associated with the occurrence of El Nino event, the kinetic energy of low-frequency waves has obvious varia?tion: the kinetic energy of atmospheric intraseasonal (30-60 days) oscillation (ISO) decreases abruptly and the kinetic energy of quasi stationary waves increases abruptly. Moreover, the ISO and quasi-stationary waves propagate eastward clearly corresponding to El Nino; but they clearly propagate westward in La Nina cases.
- Intrascasonal oscillation. El Nine / Southern Oscillation,
- Quasi-stationary wave
References

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Manuscript History

Manuscript received: 10 April 1998

Manuscript revised: 10 April 1998

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

Activities of Low-Frequency Waves in the Tropical Atmosphere and ENSO

1. LASG, Institute of Atmospheric Physics, CAS, Beijing 100080,LASG, Institute of Atmospheric Physics, CAS, Beijing 100080

Manuscript received: 1998-04-10
Manuscript revised: 1998-04-10

Abstract: ENSO, particularly the occurrence of ENSO is still an important research object in climatic variation. Using the ECMWF data, the relationship between ENSO and the activities of low-frequency waves in the tropical atmosphere is analyzed in this paper. It is shown that the occurrence of ENSO is closely related to the intraseasonal oscillation and the quasi-stationary waves (the period > 90 days) in the tropical atmosphere. Associated with the occurrence of El Nino event, the kinetic energy of low-frequency waves has obvious varia?tion: the kinetic energy of atmospheric intraseasonal (30-60 days) oscillation (ISO) decreases abruptly and the kinetic energy of quasi stationary waves increases abruptly. Moreover, the ISO and quasi-stationary waves propagate eastward clearly corresponding to El Nino; but they clearly propagate westward in La Nina cases.

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