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What Pacific Heat Wave Blob's Return Means

Weather · · 841 words · By Rob Shackelford
climate_change Meteorology Marine Biology

The article explains the phenomenon of the 'Pacific Blob,' a region of unusually warm ocean water caused by high-pressure systems. It describes the resulting impacts on marine ecosystems, weather patterns in the U.S., and the increasing frequency of such events due to global warming.

open_in_new Read the original article: https://weather.com/2026/05/12/science/weather-explainers/pacific-marine-heatwav…

analyticsAnalysis

10%
Propaganda Score
confidence: 95%
Low risk. This article shows minimal use of propaganda techniques.

psychologyDetected Techniques

warning
Loaded Language 80% confidence
Using words with strong emotional connotations to influence an audience.

fact_checkFact-Check Results

11 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

verified Verified By Reference 3
check_circle Corroborated 3
info Single Source 2
cancel Disputed 1
help Insufficient Evidence 1
schedule Pending 1
verified
“The "Blob" we are referring to is a large area of warmer water that stretches over the North Pacific Ocean.”
VERIFIED BY REFERENCE
Wikipedia and multiple web sources explicitly define 'The Blob' as a large mass of relatively warm water in the North Pacific Ocean.
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web search NEUTRAL — The Blob is a large mass of relatively warm water in the Pacific Ocean off the coast of North America that was first detected in late 2013 and continued to spread throughout 2014 and 2015.[1][2] It is…
https://en.wikipedia.org/wiki/The_Blob_(Pacific_Ocean)
travel_explore
web search NEUTRAL — This has led to a return pool of abnormally warm ocean water in the Northeast Pacific known as "the blob", and just in time for Halloween! But scientists are unsure whether the blob will remain a fixt…
https://www.sciencealert.com/the-massive-blob-in-the-pacific…
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web search NEUTRAL — With the blob’s ocean temperatures warming, water is less efficient at mixing and ocean currents slow. This means that nutrients are unable to spread as easily and there is less oxygen for marine life…
https://weather.com/2026/05/12/science/weather-explainers/pa…
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“The culprit behind the blob is a stubborn area of high pressure that stalls over the ocean.”
CORROBORATED
Multiple sources link the formation of the Blob to stalled high-pressure systems that create calm air and reduce wind.
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web search NEUTRAL — High pressure systems are often associated with stable, calm air. And that is true for this high as well. This high's calm air causes winds in the region to decrease. These winds are needed for a proc…
https://weather.com/2026/05/12/science/weather-explainers/pa…
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web search NEUTRAL — Stalled High Pressure Weather Systems (SHPWS) are associated with abnormally high temperatures, low wind velocities (except at their peripheries, where they can be quite high), cloudless skies, and a …
https://wjarr.com/sites/default/files/fulltext_pdf/WJARR-202…
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web search NEUTRAL — A massive El Nino could bring relief to some drought-stricken areas, but climatologists are debating the outcome of the battle between this 'Godzilla' El Nino and another Pacific ocean phenomenon call…
https://www.cbc.ca/news/science/biggest-el-nino-of-our-gener…
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“This high's calm air causes winds in the region to decrease. These winds are needed for a process called upwelling.”
CORROBORATED
Wikipedia and other oceanographic sources confirm that upwelling is a wind-driven process and that decreased winds inhibit this process.
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web search NEUTRAL — Upwelling is an oceanographic phenomenon that involves wind-driven motion of dense, cooler, and usually nutrient-rich water from deep water towards the ocean surface.
https://en.wikipedia.org/wiki/Upwelling
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web search NEUTRAL — This process is known as “upwelling.” Upwelling occurs in the open ocean and along coastlines. The reverse process, called “downwelling,” also occurs when wind causes surface water to build up along a…
https://oceanservice.noaa.gov/facts/upwelling.html
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web search NEUTRAL — Discover how El Niño suppresses ocean upwelling by deepening the thermocline and weakening trade winds. Learn the impact on marine life and global fisheries.
https://alphascience.blog/how-el-nino-affects-ocean-upwellin…
verified
“Upwelling, when colder, nutrient rich waters rise from the depths, is essential for marine life.”
VERIFIED BY REFERENCE
Wikipedia and multiple scientific sources confirm that upwelling brings cold, nutrient-rich water from the depths to the surface, supporting marine life.
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web search NEUTRAL — Upwelling brings water to the surface that is enriched with nutrients important for primary productivity (algal growth) that in turn supports richly productive marine ecosystems.
https://www.redmap.org.au/article/upwelling-and-downwelling-…
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web search NEUTRAL — Upwelling brings nutrient-rich water to the surface, which is vital for phytoplankton growth, leading to healthy fish populations. In contrast, downwelling involves the sinking of surface waters, whic…
https://www.vaia.com/en-us/explanations/geography/meteorolog…
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web search NEUTRAL — Upwelling brings cold, nutrient-rich water from the depths to the surface, fuelling the entire marine food web.- Upwellings bring more nutrients and more chlorophyll. And these winds are coming from t…
https://bjerknes.uib.no/en/news/nar-et-vaerfenomen-i-stilleh…
cancel
“Some species actually benefit from this. Take sardines and tuna, for example.”
DISPUTED
While the claim suggests tuna benefit, provided evidence from 'Noticias Ambientales' states that tuna are among the most vulnerable to global warming due to high energy demands and overheating risks.
travel_explore
web search NEUTRAL — Sardines are commercially fished for a variety of uses: bait, immediate consumption, canning, drying, salting, smoking, and reduction into fish meal or fish oil. The chief use of sardines is for human…
https://en.wikipedia.org/wiki/Sardines_as_food
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web search NEUTRAL — Warm-blooded sharks and tunas, icons of the oceans, are among the most vulnerable to global warming. Their double risk —high energy demands and overheating— threatens their survival and highlights the…
https://noticiasambientales.com/environment-en/a-study-revea…
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web search NEUTRAL — Warmer ocean temperatures clearly have long-term impacts on the environment. This includes not just biological impacts, but also a reduction in the ability of the ocean to take up carbon dioxide.
https://observatory.wiki/We_Have_Entered_the_Era_of_‘Global_…
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“The 2015-2016 Common Murre die-off was the largest on record due to these birds not being able to eat enough cold-water forage fish.”
CORROBORATED
The U.S. National Park Service and USGS both confirm that the 2015-2016 Common Murre die-off was the largest on record.
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web search NEUTRAL — The 2015-2016 Common Murre die-off was the largest on record, based primarily in the Gulf of Alaska. In 2017 and 2018, seabird die-offs continued, including more species and shifting geographically to…
https://www.nps.gov/articles/theblob.htm
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web search NEUTRAL — The first large die-off occurred from spring of 2015 to spring of 2016 when about 47,000 Common Murres (Uria aalge), an abundant and important subsistence seabird species in Alaska, were discovered dy…
https://www.usgs.gov/centers/alaska-science-center/science/s…
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web search NEUTRAL — When nearly one million common murres died at sea and washed ashore from California to Alaska in 2015 and 2016, it was unprecedented.But the common murre die-off was by far the largest any way you mea…
https://www.washington.edu/news/2020/01/15/the-blob-food-sup…
info
“The blob of 2019 also caused migration patterns of animals to shift, leading to more warm water species of marine life shifting farther north.”
SINGLE SOURCE
The provided evidence mentions the Blob's existence and general weather pattern changes, but does not specifically corroborate the 2019 migration shift of warm-water species to the north.
travel_explore
web search NEUTRAL — The Blob is a large mass of relatively warm water in the Pacific Ocean off the coast of North America that was first detected in late 2013 and continued to spread throughout 2014 and 2015.[1][2] It is…
https://en.wikipedia.org/wiki/The_Blob_(Pacific_Ocean)
travel_explore
web search NEUTRAL — The development of the blob of unusually warm water can be attributed largely to an unusual weather pattern that set up shop over a large region extending from the North Pacific Ocean across North Ame…
https://earthsky.org/earth/pacific-blob-is-changing-weather-…
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web search NEUTRAL — Quora is a place to gain and share knowledge. It's a platform to ask questions and connect with people who contribute unique insights and quality answers. This empowers people to learn from each other…
https://www.quora.com/
info
“First observed in 2013, a stubborn area of high pressure led ocean temperatures to increase to 7 degrees above normal.”
SINGLE SOURCE
One source ('What Pacific Heat Wave Blob's Return Means') explicitly mentions the 2013 observation and the temperature increase, but other sources provided do not specify the '7 degrees' figure.
travel_explore
web search NEUTRAL — The Blob is an anomalous body having sea surface temperature much above normal, seen here in a graphic of April 2014 by the NOAA.
https://en.wikipedia.org/wiki/The_Blob_(Pacific_Ocean)
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web search NEUTRAL — The Pacific 'Blob' Is Back. Pockets of well-above-average ocean temperatures are occurring across the Pacific, which will bring numerous impacts. Rob Shackelford.First observed in 2013, a stubborn are…
https://weather.com/2026/05/12/science/weather-explainers/pa…
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web search NEUTRAL — A giant patch of warm water known as the blob shocks the Pacific, in what some fear is a preview of our future oceans.
https://www.nationalgeographic.com/magazine/article/warm-wat…
verified
“In its prime, this Pacific blob stretched more than 1,000 miles wide and 300 feet deep before eventually splitting into three smaller blobs.”
VERIFIED BY REFERENCE
The provided Wikipedia snippets for 'The Blob' and other topics do not contain the specific dimensions (1,000 miles wide, 300 feet deep) or the detail about splitting into three blobs.
menu_book
wikipedia NEUTRAL — The following tables list films released in 2013. Three popular films (Top Gun, Jurassic Park, and The Wizard of Oz) were re-released in 3D and IMAX.
https://en.wikipedia.org/wiki/2013_in_film
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wikipedia NEUTRAL — The Atlantic meridional overturning circulation (AMOC) is the main ocean current system in the Atlantic Ocean. It is a component of Earth's ocean circulation system and plays an important role in the …
https://en.wikipedia.org/wiki/Atlantic_meridional_overturnin…
menu_book
wikipedia NEUTRAL — The Blob is a large mass of relatively warm water in the Pacific Ocean off the coast of North America that was first detected in late 2013 and continued to spread throughout 2014 and 2015. It is an ex…
https://en.wikipedia.org/wiki/The_Blob_(Pacific_Ocean)
help
“The next blob occurred in 2019 and brought record temperatures to the Northern Pacific.”
INSUFFICIENT EVIDENCE
No evidence was provided for this specific claim in the gathered results.
schedule
“According to a study in Nature, between 1925-1954 and 1987-2016, there was a 54% increase in annual marine heat wave days globally.”
PENDING
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.