Temperature anomaly map: http://data.giss.nasa.gov/cgi-bin/gistemp/nmaps.cgi?sat=4&ss...
Btw. Increased temperature may be the underlying cause. Warmer temperature -> increased humidity -> more snow -> more ice.
Btw. Increased temperature may be the underlying cause. Warmer temperature -> increased humidity -> more snow -> more ice.
Also, as a comment (iirc) on the Ars Technica take on thus story pointed out, the error bars on the study are so huge that it's unreasonable to conclude the ice is thickening without more accurate data.