Saving Seafood

Marine heat wave ‘blobs’ are becoming more severe as oceans warm

October 20, 2020 — Off the coast of California this August a sea monster of record size was spotted: a patch of warm water that grew to the size of Canada, 9.8 million square kilometers simmering up to 4 degrees Celsius warmer than usual. “It’s off the chart,” says Andrew Leising, a fisheries oceanographer at the National Oceanic and Atmospheric Administration who is mapping the marine heatwave on his website, nicknamed the Blobtracker. By Leising’s reckoning, in September, the unglamorously-named “NEP20b” became the biggest-yet-spotted blob of warm water there since satellite records began in the early 1980s.

Researchers are now scrambling to chart or anticipate the impacts of the NEP20b blob on marine life, tracking how the step change in temperature throws ecosystems out of whack.

The phenomenon of a patch of abnormally warm water off the west coast of North America gained notoriety in 2014, when the first such “Blob” was spotted and given that name, after the horror movie creature that devoured everything in its path. That first Blob lasted years, from 2013 to 2016. It has been blamed for slicing some forage fish populations in half; starving seabirds; triggering a collapse in cod; shifting tuna as far north as Alaska; pushing whales into the path of crab fishing lines and ships; and allowing exotics, including glowing tropical sea pickles, to arrive in northern waters.

In 2019, a second blob emerged. With record-warm waters appearing again this year, some scientists believe the 2019 event, known as Blob 2.0, may have just never gone away. If NEP20b is now big enough and hot enough, Leising says, it may do what the 2013-2016 version did, creating its own microclimate that perpetuates the heat, forcing the warm water to stick around for years yet to come.

Read the full story at PBS

A New Marine Heat Wave Threatens Hawaii’s Reefs

October 21, 2019 — Parts of the Pacific Ocean are simmering, threatening coral reefs and livelihoods around Hawaii, and causing many to worry of worse to come.

“The ocean is very important to us,” said Ka’imi Kaupiko, who lives in Milolii, a community often called the last Hawaiian fishing village, on the Big Island. The way of life there depends on the fish provided by the reefs, reefs which are now becoming sick in the warming waters.

“It affects a lot of how we are going to survive,” Mr. Kaupiko said.

Researchers said the heat wave was reminiscent of 2014, when a hot spot that became known as the blob began forming in the Pacific. It expanded and lingered over much of the Pacific Coast from Mexico to Alaska for years.

Both marine heat waves are “super unusual,” according to Andrew Leising, a research oceanographer with the National Oceanic and Atmospheric Administration. Nearly every other marine heat wave NOAA has recorded in 40 years of satellite monitoring shrinks in comparison.

“The event in ’14-15 was maybe eight to 10 times the size of Alaska. And the current event we’re having is nearly that big,” Dr. Leising said. “And then, everything else is sort of an even further distant third or fourth.”

Read the full story at The New York Times

A vast heat wave is endangering sea life in the Pacific Ocean. Is this the wave of the future?

October 17, 2019 — A vast region of unusually warm water has formed in the northeastern Pacific Ocean, and scientists are worried that it could devastate sea life in the area and fuel the formation of harmful algal blooms.

The broad swath of warm water, now known as the Northeast Pacific Marine Heat Wave of 2019, was first detected in early June. Now data from weather satellites and buoys show that it measures six to seven times the size of Alaska, which spans more than 600,000 square miles.

Given its size and location, the marine heat wave rivals a similar one that arose in 2014 and persisted for two years. That heat wave, known simply as “the blob,” occupied roughly the same region of the Pacific and became known for triggering widespread die-offs of marine animals including sea birds and California sea lions.

“The moms were going out to get food, but when they couldn’t find anything, they swam off and the babies were just left dying,” Andrew Leising, an oceanographer at the National Oceanographic and Atmospheric Administration’s Southwest Fisheries Science Center in La Jolla, California, said of the sea lions and their inability to find enough squid and fish to feed on.

Read the full story at NBC News

Scientists warn West Coast ocean heat wave could pose major risk to whales, salmon, sea lions

September 6, 2019 — A heat wave forming off the west coast in the Pacific Ocean resembles a 2014-15 phenomenon that led to major disruptions to marine life along the western seaboard, federal scientists said Thursday.

The National Oceanic and Atmospheric Administration (NOAA) wrote in a blog post that a growing belt of warm water that stretches from Alaska to California “ranks as the second largest marine heatwave in terms of area in the northern Pacific Ocean in the last 40 years, after ‘the Blob,’ ” referring to the 2014-15 heat wave.

“It’s on a trajectory to be as strong as the prior event,” said scientist Andrew Leising of NOAA Fisheries’ Southwest Fisheries Science Center in La Jolla, Calif.

“Already, on its own, it is one of the most significant events that we’ve seen,”Leising added.

Read the full story at The Hill