### Abstract

An analytical solution of the model with a constant mean zonal flow reveals that amplitudes of forced waves can be significantly modulated by the mean zonal flow through its Doppler-shift effect on the forcing frequency. In general, amplitudes of westward-propagating waves, such as the Rossby and mixed Rossby-gravity waves, tend to be larger in mean westerlies than in mean easterlies for low-frequency forcing but smaller in mean westerlies for high-frequency forcing. The opposite dependence on the mean zonal flow applies to eastward-propagating waves, such as the Kelvin wave. The model numerical solutions show that the spatial structure of the laterally forced equatorial perturbation as a whole is sensitive to the mean zonal flow. -from Author

Original language | English (US) |
---|---|

Pages (from-to) | 807-821 |

Number of pages | 15 |

Journal | Journal of the Atmospheric Sciences |

Volume | 50 |

Issue number | 6 |

State | Published - 1993 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Atmospheric Science

### Cite this

*Journal of the Atmospheric Sciences*,

*50*(6), 807-821.

**Laterally forced equatorial perturbations in a linear model. Part II : mobile forcing.** / Zhang, Chidong.

Research output: Contribution to journal › Article

*Journal of the Atmospheric Sciences*, vol. 50, no. 6, pp. 807-821.

}

TY - JOUR

T1 - Laterally forced equatorial perturbations in a linear model. Part II

T2 - mobile forcing

AU - Zhang, Chidong

PY - 1993

Y1 - 1993

N2 - An analytical solution of the model with a constant mean zonal flow reveals that amplitudes of forced waves can be significantly modulated by the mean zonal flow through its Doppler-shift effect on the forcing frequency. In general, amplitudes of westward-propagating waves, such as the Rossby and mixed Rossby-gravity waves, tend to be larger in mean westerlies than in mean easterlies for low-frequency forcing but smaller in mean westerlies for high-frequency forcing. The opposite dependence on the mean zonal flow applies to eastward-propagating waves, such as the Kelvin wave. The model numerical solutions show that the spatial structure of the laterally forced equatorial perturbation as a whole is sensitive to the mean zonal flow. -from Author

AB - An analytical solution of the model with a constant mean zonal flow reveals that amplitudes of forced waves can be significantly modulated by the mean zonal flow through its Doppler-shift effect on the forcing frequency. In general, amplitudes of westward-propagating waves, such as the Rossby and mixed Rossby-gravity waves, tend to be larger in mean westerlies than in mean easterlies for low-frequency forcing but smaller in mean westerlies for high-frequency forcing. The opposite dependence on the mean zonal flow applies to eastward-propagating waves, such as the Kelvin wave. The model numerical solutions show that the spatial structure of the laterally forced equatorial perturbation as a whole is sensitive to the mean zonal flow. -from Author

UR - http://www.scopus.com/inward/record.url?scp=0027789414&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027789414&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0027789414

VL - 50

SP - 807

EP - 821

JO - Journals of the Atmospheric Sciences

JF - Journals of the Atmospheric Sciences

SN - 0022-4928

IS - 6

ER -