Reply to J. R. Holton

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I agree with Holtm that further studies incorporating synoptic-cumulus scale interactions as well as boundary layer friction are necessary. In particular, the last two terms in eq. 5 of Shapiro (1977) can not balance with an inviscid interior (Stevens et al. (1976)). The tendency of these terms to balance can be attributed to the inclusion of cumulus momentum transports and can not be specified a priori without omitting essential physics. Thus a barotropic model, such as Holton’s (1979, which can not incorporate the vertical structure of the heating or the waves and which allows only a Rayleigh friction form of cumulus momentum transports (Holton’s eq. 14), can not properly diagnose the dynamics of the waves above the boundary layer.DOI: 10.1111/j.2153-3490.1977.tb00739.x
  • References (4)

    Holton, J. 1971. A diagnostic model for equatorial wave disturbances: the role of vertical shear of the mean zonal wind. J.AImos. Sci. 28, 55-64.

    -1975. On the influence of boundary layer friction on mixed Rossby-gravitywaves. Tellus27. 107-1 15.

    Shapiro, L. 1977. Frictional effects on thermally forced waves. Tellus 29, 264-27 1.

    Stevens, D., Lindzen, R. & Shapiro. L. 1976. A new model of tropical waves incorporating momentum mixing by cumulus convection. Submitted to Dynamics of Atmospheres and Oceans.

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