EarthRef.org Digital Archive (ERDA) -- CALS7K.2 northern hemisphere movies centered on the north pole

Description
This archive contains movies from CALS7K.2 for the better resolved northern hemisphere only, centered on the north pole. With CALS7K.2 we present a continuous global geomagnetic field models for the recent millennia: CALS7K.2 covering 7000 years from 5000~BC to 1950~AD. The model was determined by regularized least squares inversion of archeo- and paleomagnetic data using spherical harmonics in space and cubic B-splines in time. While data accuracy and dating uncertainties remain limited, reliable low-resolution global models can be obtained. For the first time a significant amount of archeointensity data is used in this kind of global model, allowing the determination of evolution of the dipole strength.

Instructions
The zipped archive CALS7K_2mov3.zip contains 4 movies in mpeg format centered on the north pole. For details of file names and components shown there refer to the reference paper or main contribution about CALS7K.2.