Archive for Category: "Current climate"

Deep brain freeze: visualizing the polar vortex

Deep brain freeze: visualizing the polar vortex

For the second afternoon in a row, a potent cold front has swept across Denver, marking the return of a deep freeze for much of the country. Yesterday, my weather station recorded a 32-degree drop in less than 90 minutes (here’s a chart). This latest cold snap is sure to revive talk about the polar […]

Animation of global warming since 1880

Animation of global warming since 1880

NASA has produced a fascinating animation showing how global temperatures have been changing since the late 19th century. You can really see things heat up starting in the 1970s. 2011 was the 5th warmest year on record, as NASA’s James Hanson noted: “We know the planet is absorbing more energy than it is emitting . […]