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
Laterally forced equatorial perturbations in a linear model. Part II : mobile forcing. / Zhang, Chidong.
In: Journal of the Atmospheric Sciences, Vol. 50, No. 6, 1993, p. 807-821.Research output: Contribution to journal › Article
}
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 -