<b>Figure captions</b>



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Figure captions

Figure 1. Structure of the model. Potential radius, , is used as the model radial coordinate. is the physical radius of surfaces at the sea surface and is the physical radius of surfaces at the tropopause; these are predicted quantities. The thermodynamic variables are , , and and the mass streamfunction is defined in the middle troposphere. is the diagnosed streamfunction at the top of the subcloud layer.

Figure 2. Evolution with (nondimensional) time of the maximum (nondimensional) azimuthal velocity for the control run of the present model (solid) and of the original E89 model (dashed) run with the same parameters and initial and boundary conditions.

Figure 3. Evolution with time of the maximum azimuthal velocity for three different values of the parameter , which influences the rate of moistening of the lower troposphere by convection.

Figure 4. Evolution with time of the maximum azimuthal velocity for a run identical to the control but starting with a velocity amplitude of only (solid), and a similar run but starting from a condition in which the whole atmospheric column is saturated inside the radius (dashed).

Figure 5. The convective updraft volume flux () and clear air vertical velocity () at 6.8 days, plotted as a function of radius from the storm center, in a run identical to the control but with the initial entropy deficit of the middle troposphere, reduced to . For perspective, the radius and velocity scales have been expressed in dimensional terms using the typical scaling values shown in Table 1. A new eyewall has just formed near km radius; it then moved slowly inward while the inner eyewall dissipated.



Kerry Emanuel
Mon Jan 5 07:19:46 EST 1998