Harmful algal blooms will become a more common feature of a warming Arctic. Last summer, a massive bloom was detected off the coast of Western Alaska, almost by chance, when scientists sailing through the Bering Strait and Chukchi Sea found worryingly high levels of Alexandrium catenella.

The powerful remnants of Typhoon Merbok pounded Alaska’s western coast on Sept. 17, 2022, pushing homes off their foundations and tearing apart protective berms as water flooded communities. Storms aren’t unusual here, but Merbok built up over unusually warm water. Its waves reached 50 feet over the Bering Sea, and its storm surge sent water levels into communities at near record highs along with near hurricane-force winds.

Last week, a 908-foot Russian tanker carrying liquified natural gas passed south through the Russian side of the Bering Strait, with two more to follow. The ships are traversing the northern coast of Siberia, called the North Sea Route, in the middle of January with no icebreaker escort, an unprecedented event that may hint at the future of the region as climate change alters global commerce.

Late last week a strong Bering Sea storm hit the region, bringing winds up to 50mph, blowing snow, and high-water. Some communities saw significant erosion while others were mostly unscathed.

The “thermal curtain” is another expression for “cold pool” that acts as a barrier to keep some species—pollock and Pacific cod, for example — from migrating across the eastern Bering Sea shelf and northward toward the Bering Strait. For the first time in 37 years of surveying the Bering Sea, we could not find the cold water barrier.

Recent storms and warm seas melted a vast stretch of ice in the Bering Sea, leaving some islands surrounded by water when they should be locked in ice.