Add Yahoo as a preferred source to see more of our stories on Google. The Arctic Oscillation, or "AO" for short, describes the periodic strengthening and weakening of the polar vortex. In this case, ...
PORTLAND (WGME) -- Another round of modified arctic air is on the way this weekend. Let's first talk about what the Arctic Oscillation is and why it’s important to our weather. The AO is a large-scale ...
The Arctic Oscillation, or "AO" for short, describes the periodic strengthening and weakening of the polar vortex. In this case, the polar vortex is the air mass that rotates around the North Pole, ...
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