Graph of the Day for February 21, 2010

"Warming of the climate system is unequivocal, as is now evident from observations of increases in global average air and ocean temperatures, widespread melting of snow and ice and rising global average sea level."  The IPCC 4th Assessment Report (2007).

Source:  Watts Up With That?  (Vertical scale units are square kilometers.)

Hoven's Index for February 21, 2010

The top five weeks since November 1966 with the most northern hemisphere ground area covered with snow:

Week 6 of 1978

Week 7 of 2010 (most recent week of available data)

Week 7 of 1978

Week 4 of 2008

Week 2 of 1979

Of the 100 most snow-covered weeks in the northern hemisphere, the number that occurred from 1991 to 2000:  5

From 2001 to 2010:  30

Source:  Rutgers University, Global Snow Lab.

Graph of the Day Archive.