Historical reconstruction of western Alaska sea ice (Bering Sea) shows February through March 2018's sea ice extent was the lowest on record since at least 1850

Data is assembled from recent satellite data, whaler's logs, ship records, etc. More info: https://t.co/fDS93o8ZtH pic.twitter.com/lbkul7uWKV

— Zack Labe (@ZLabe) April 30, 2018