The recent polar vortexes ignited a new round of debate on whether climate change is happening or not. But a recently released video from the National Oceanic and Atmospheric Administration (NOAA) is so striking and straightforward, it makes the life of climate-change skeptics really hard.
The short 1-minute animation shows the amount of arctic ice change from 1987 to 2003. The brighter parts are thick, multi-year ice; the dark-blue parts are “first-year ice,” which is ice that formed in the most recent winter. Today, very little old ice remains.