Type of observation | Granules | Mesogranules | Supergranules | Giant cells |
Horizontal velocity | 1400 m/s | ? | 300 m/s | 25 m/s |
Vertical velocity | 900 m/s | 60 m/s | 35 m/s | ? |
Horizontal length scale | 1.4 Mm | 7.0 Mm | 30 Mm | 340 Mm |
Cell lifetime | 0.07 hours | 2.0 hours | 25 hours | 1800 hours |
Turnover time | 0.30 hours | ? | 30 hours | 3800 hours |
theory | ||||
Squared Mach # | 0.11 | ? | 1.4e-5 | 1.6e-7 |
Rossby # | 167 | ? | 1.67 | 0.012 |
Rossby number of Jupiter's Great Red Spot: 0.015