Two climate change spawned monsters are duking it out over thousands of miles of Pacific Ocean waters. And in a human heated world its an epic battle between these two warming fueled atmospheric and oceanic goliaths — the Godzilla El Nino versus the Pacific Ocean’s Hot Blob.
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Ridiculously Resilient Ridge. RRR. Blocking high pressure system. All names given to a sprawling heat dome that has plagued the U.S. West Coast for the better part of two years running. It’s a weather system largely responsible for the California drought — the worst in at least 1200 years. A weather system implicated in an extraordinarily intense outbreak of wildfires across the North American West from Alaska through British Columbia and all along the US West Coast — including within the usually moist rain forests of Washington and Oregon.
(The RRR is shrinking and increasingly besieged by storms. A sign that the El Nino related Pacific Storm track intensification is beginning to assert. Image source: Earth Nullschool.)
It’s a system connected to a climate change-enforced melting of Arctic sea ice and a similarly forced warming of the Northeastern Pacific Sea surface far above typical temperatures (see here, here, and here). An unprecedented and extreme heating of waters into a ‘Hot Blob’ stretching for thousands of miles. A related drying of airs. Oceanic and atmospheric heat energy generating an implacable atmospheric bully. A high pressure system so powerful it typically flung Pacific Ocean storms far off course — as far north as the High Arctic.
But now the RRR is starting to weaken. Its great northward extending ridge has retreated from Alaska. Intense storms exploding out from a system that is likely to rival the strongest El Nino on record (1997-1998) are now surrounding the ridge, nibbling away at its edges, cooling the waters of the hot blob through Ekman pumping, and raging on through Alaska and the Pacific Northwest.
(Storm-based upwelling is starting to cool Northeastern Pacific Ocean waters in a region that has been dominated by the Hot Blob during recent years. A condition that is undermining some of the RRR’s support. El Nino based storm generation to the south will likely continue to aim blows at this oceanic heat base. Image source: Earth Nullschool.)
It’s early sign of RRR collapse. That the Hot Blob is starting to fail. With some of the precursors to likely far more intense Fall and Winter storms starting to get caught up into its spiraling decline. And as sea surface temperature anomalies are likely to hit 2.0 to 2.3 C above average in the Niño 3.4 zone in this week’s NOAA El Niño report, more RRR-challenging storms are likely on the way.
As Ricky Rood over at Weather Underground said this week it’s Godzilla vs the Blob. And Godzilla, at this point, appears to have the upper hand. And once the Blob goes down there’s nothing to keep what are likely to be some seriously epic storms slamming into the west coast of North America this Fall and Winter. But according to recent science, there’s a high risk that the Blob will creep on back as the Godzilla El Nino retreats during mid to late 2016. And for the West Coast that means high risk of a pretty vicious cycle of drought to flood to drought. A dangerous weather pattern intrinsically related to human-forced climate change.
Hat Tip to Colorado Bob