Arctic air may be plunging south into the U.S. midsection this week, but for the globe as a whole, the picture has been quite different recently.
Check out NASA’s latest rendering of the big global picture above. It shows how temperatures departed from the 1951-1980 average in June. The warm colors covering most of the globe attest that June 2014 was quite warm — according to NASA, the sixth warmest in an instrumental record that goes back 134 years.
The map also offers hints of a numb