There’s something not quite right going on in the Pacific.
In the northeast of that great ocean, the Ridiculously Resilient Ridge just keeps growing. A gigantic high pressure cell spreading out to encompass the entire region from the Aleutians to just off the California Coast. This giant, implacable system has lasted now for the better part of two years. A mountain of atmospheric inertia towering over a deadly, human-warmed, hot pool of Pacific Ocean water.
A Not Normal Storm Track
To the west of our monstrous ridge runs an abnormal storm track. Firing off just north of the Equator and south and east of Japan, the track is fed by tropical systems swinging north and eastward. Merging frontal storms with the warm core cyclones, this storm track runs up along the boundary of the Northwest Pacific and into the Bering. Many of these storms end up bottled there. But a few surge over into the Chukchi and East Siberian seas. In this way, heat and moisture that originated in the tropics is eventually delivered to the Arctic. Exactly the kind of south to north heat and storm potential energy delivery that Dr. Jennifer Francis has been warning us about.
Over the next few days, this storm, heat, and moisture conveyor belt will continue to lend energy to systems firing off over the Pacific side of the Arctic. These storms will generate winds of 25 to 35 miles per hour with higher gusts. They’ll send swells in the range of 4-7 feet rippling across the still ice-smattered waters. And they’ll fling rain, sleet, freezing rain and snow over the still melting ice. An unsettled pattern featuring cold-core systems with an intensity comparable to tropical depressions but firing off in the chill boundary zones along the sea ice melt edge.
Ridge Forms South-to-North Storm Conveyor Belt
(Pacific storm track runs from just north of the Equator and on up into the Chukchi in this GFS model forecast for high [white] and low [purple] pressure systems on Sunday, August 16th. Is this the track that El Nino generated storms take as the world warms? If so, there’s more trouble in store for the Arctic. Image source: Earth Nullschool.)
Then, according to GFS model runs, things start to get interesting. By Sunday, August 16th our massive Northeast Pacific Ridge starts to really flex its muscles. It heightens to a near 1040 mb high pressure cell and links arms across the Arctic with a 1030 mb high over the Central Arctic Basin and another 1030 mb high over the Barents. In other words, the ridge forms a transpolar daisy chain. And on the left side of this transpolar ridge, the storm and moisture conveyor running toward the Arctic boundary kicks up a notch. Double barrel cyclones fire off in the region of 15 degrees North Latitude spawning from the very strong atmospheric feedback of our monstrous-looking El Nino. Three more storms run in train from 30 North to just past the 70 degree line in the Chukchi.
And all run along a diagonal northeasterly track aimed directly at the Arctic’s thawing heart.
It’s a new, odd storm track. One that, depending on the strength and orientation of the Arctic high either ends in the Bering, or runs all the way to the Pole itself. A heat and moisture delivery system that begins to take form in August but that, during recent years, has churned along through Fall, Winter and Spring. It’s a pattern that in 2015 is fed both by the global warming related hot pool in the Northeast Pacific and an El Nino still plowing toward off-the-charts strong. And due to the immense energy of the weather and climate systems involved it’s an anomalous pattern that risks an extreme storm potential energy delivery running from Equator to Arctic.