TY - JOUR
T1 - Laterally forced equatorial perturbations in a linear model. Part II
T2 - mobile forcing
AU - Chidong Zhang, Zhang
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
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
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U2 - 10.1175/1520-0469(1993)050<0807:lfepia>2.0.co;2
DO - 10.1175/1520-0469(1993)050<0807:lfepia>2.0.co;2
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 -