Simple Planetary Convection and Magnetism Estimations via Scaling and Observations

摘要: Scaling laws describing planetary convection are considered with the purpose to obtain a simple formulation of equations governing turbulent in critical regime close onset. This justifies, certain way, available numerical models and MHD dynamos that too nevertheless successful. Such here for known terrestrial planets moons. The arithmetic mean magnetic field (AMF) dynamo region is ~1 mT, AMF vector follows closely rotation axis Earth, Jupiter Saturn. Uranus Neptune have large inclinations ~0.1 mT. Similar value believed hold Ganymede. smallest ~0.01 mT Mercury. geodynamo root-mean-squared (RMF) ratio estimated from 10 100 scaling laws. same order values may Saturn while other might smaller ratios. RMF/AMF can also be viewed as measure internal intermittency.