ARCTIC TEMPERATURE OSCILLATIONS
ARCTIC MAGNETIC FIELD AND ARCTIC TEMPERATUREThe Earth's magnetic field is in a permanent flux, the overall strength of the field has been gradually declining during last 150 years. South Hemisphere's magnetic field's maximum strength is concentrated in a single area and its decline has been relatively even, while the NH magnetic distribution is more complex, its maximum strength is split between two areas, thousands of miles apart, one is located in the general area of Hudson Bay and the other in the central Siberia, north of Baikal Lake.

POLAR AMPLIFICATION AND THE EARTH'S MAGNETIC
FIELD
Dr. J. Dickey of NASA's Jet Propulsion Laboratory, Pasadena:
POLAR VORTEX is GUIDED by the EARTH's MAGNETIC FIELD
"One possibility is the movements of Earth's core (where Earth's magnetic field originates) might disturb Earth's magnetic shielding of charged-particle (i.e., cosmic ray) fluxes that have been hypothesized to affect the formation of clouds. This could affect how much of the sun's energy is reflected back to space and how much is absorbed by our planet. Other possibilities are that some other core process could be having a more indirect effect on climate, or that an external (e.g. solar) process affects the core and climate simultaneously."
http://www.nasa.gov/topics/earth/features/earth20110309.html
Polar Vortex January 2013
Polar Vortex January 2009 - NASA animation
http://eoimages.gsfc.nasa.gov/images/imagerecords/36000/36972/npole_gmao_200901-02.mov