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.

Toxic algal blooms which can be fatal to humans, are increasing across the world as temperatures rise, according to the first global survey of dozens of freshwater lakes based on 30 years of NASA data. 

During their three weeks aboard the Healy, Bob Pickart and his team observed some Harmful Algal Blooms (HABs). One was near Point Hope.

Algae isn't just causing swimmers' itch anymore; it's threatening water supplies. State regulations are starting to address it.

High levels of toxic blue-green algae, which has thrived in this summer's extreme hot weather, is making it more difficult to secure clean drinking water. ...