It's Boston local news in one concise, fun and informative emailThank you! You have been subscribed to WBUR Today.We were unable to subscribe you to WBUR Today. You can try subscribing here or try again later.
A U.S. Coast Guard crew retrieves a canister dropped by parachute in the Arctic in 2011. Over the past four decades, researchers at the University of California, Santa Barbara, and several other universities have studied shifts in atmospheric circulation above the Arctic. (NASA/Kathryn Hansen)