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The Pacific blob is back, which could be bad news for the western coasts of the United States and Canada.
This is because, in the past, the amount of warm seawater has resulted in poor nutrition for salmon. It is linked to whale mortality and warming in western North America.
It is also linked to a phenomenon that Californian meteorologists have dubbed the Ridiculously resilient ridge, would have played an important role in the the drought that has plagued the state from 2011 to 2016.
Now, Alaska and northwestern Canada are seeing the "son of the Pacific's drip", Armel Castellan's Environment and Climate Change Canada I said.
"Seeing a kind of task set up at this time of year is rather surprising," Castellan said. CBC News. "It's a symptom of the weather that we've experienced over the past four years, either in the long-term or the long-term."
Alaska already experiences unusually warm temperatures and northern British Columbia still has a summer climate. Alaska has just finished one of its hottest September months in 94 years, according to the National Administration of Oceans and the Atmosphere. Parts of southern Italy are experiencing drought.
The drop of hot water produced by the Pacific creates a period of high pressure that changes the direction of the Pacific jet stream. This causes warmer weather and, in the case of California's ridiculously resistant ridicule, has prevented normal winter storms from landing where they are most needed.
At present, if the Pacific blot does not dissipate, Alaska, the Pacific Northwest, Montana, northern Wyoming, and western North Dakota could experience temperatures warmer than usual in winter.
A side effect of Pacific blob appears to be colder and wetter than usual weather conditions in the southeastern United States and mid-Atlantic littoral states.
Phenomena such as the Pacific blob are becoming more and more common, say the meteorologists.
"It's definitely something we're starting to see with these resilient ridges," Castellan said. "It just raises the question of how much this is related to climate change."
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Image credit: Rick Thoman, based on OISST data from NOAA Terrestrial System Research Laboratory.
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