Thermally Driven Rossby-Mode Dynamo for Solar Magnetic-Field Reversals

Science  17 May 1968:
Vol. 160, Issue 3829, pp. 760-763
DOI: 10.1126/science.160.3829.760-a


There is increasing interest in the possible existence of large eddies or "Rossby waves" in Sun's convection zone and photosphere. It is shown that many flows of this type, driven by an equator-pole temperature diffrence, act as hydromagnetic dynamos to produce magnetic fields that periodically reverse. The periods and field amplitudes agree with solar phenomena within an order of magnitude.