Table 1
Physical and model parameters.
| Physical parameters | |
| Planetary radius a (106 m) | 25.27 (24.55) |
| Rotation rate Ω (10−4 s−1) | 1.0124 (1.0834) |
| Specific gas constant R (J kg−1 K−1) | 3149.2 (3197.7) |
| Specific heat capacity Cp (104 J kg−1 K−1) | 1.10 (1.12) |
| Model parameters | |
| Thermal relaxation time scale τr (day) | 100 (1000) |
| Frictional time scale τf (day) | 100 (1000) |
| depth of the boundary layer σb | 0.97(0.85) |
Notes. The physical parameters are for Uranus and the values in parentheses are for Neptune, given to justify the use of the Uranus parameters in this study. For the model parameters the values in parentheses represent values for the sensitivity testing presented in Figure 7. The value given for σb is for the 30 and 10 bar simulations, for the 1 and 3 bar simulation we used 0.8 and 0.87, respectively to keep a shallow boundary layer. The values for the physical parameters are from Lodders & Fegley (1998).
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