An unusual threat is looming off the Pacific coast of North America from Juneau in Alaska to Baja California. Now roughly 2000 kilometres wide and 100 metres deep, a mass of warm water that scientists are calling “the blob” has lingered off the coast for a year and a half and has set temperature records, with waters between 1 °C and 4 °C warmer than normal.

Fresh research published in Geophysical Research Letters has examined the causes and impacts of this area of water, which has grown more recently.

via Mystery blob in the Pacific messes up US weather and ecosystems – environment – 16 April 2015 – New Scientist.