RädlerFest: Alpha Effect and Beyond

Session

Session 6

15 Feb 2011, 11:00

Wenner-Gren Center, floor 7, Hörsalen (Wenner Gren Center)

264. Coupling of the Earth's core and mantle

Paul Roberts

15/02/2011, 11:00

The coupling of the Earth's core and mantle is responsible for the largest fluctuations in the length of day. The torques exerted by the core on the mantle are of order 10^18 Nm and are due to viscosity, core-mantle topography, gravity and magnetic field. This talk will focus mainly on gravitational and magnetic coupling, either or both of which might explain the semi-decadal periodicity...

265. α-fluctuations and simple model of geomagnetic inversions

Prof. Dmitry Sokoloff

15/02/2011, 12:00

D.Sokoloff, G.Sobko, V.Trukhin, V.Zadkov (Moscow State University, Russia) We suggest a simple dynamo model based onb fluctuations of alpha-coefficient. The model sucsessfully mimic basic properties of inversion of geomagnetic field and magnetostratigraphic time scale.