by K. Richard, July 8, 2021 in NoTricksZone
There has been no net warming in the Rocky Mountains in the last 500 years.
by K. Richard, July 8, 2021 in NoTricksZone
There has been no net warming in the Rocky Mountains in the last 500 years.
by P. Voosen, May 13, 2021 in ClimagteChangeDispatch
Every time severe winter weather strikes the United States or Europe, reporters are fond of saying that global warming may be to blame.
The paradox goes like this: As Arctic sea ice melts and the polar atmosphere warms, the swirling winds that confine cold Arctic air weaken, letting it spill farther south.
But this idea, popularized a decade ago [and was the outlandish plotline in The Day After Tomorrow, pictured], has long faced skepticism from many atmospheric scientists, who found the proposed linkage unconvincing and saw little evidence of it in simulations of the climate.
Now, the most comprehensive modeling investigation into this link has delivered the heaviest blow yet: Even after the massive sea ice loss expected by midcentury, the polar jet stream will only weaken by tiny amounts—at most only 10% of its natural swings.
And in today’s world, the influence of ice loss on winter weather is negligible, says James Screen, a climate scientist at the University of Exeter and co-leader of the investigation, which presented its results last monthat the annual meeting of the European Geosciences Union.
by Anthony Watts, Apr 10, 2021 in WUWT
Climate change action proponents regularly tell us we have to reduce our carbon dioxide (CO2) emissions to prevent “climate change”, even to the point of curtailing industry, travel, and food consumption. Fortunately, a real-world test of just those very things happened in 2020 due to the COVID-19 related lockdowns.
In a report released April 12th by the U.S. Energy Information Administration (EIA) the Monthly Energy Review, they report that energy-related CO2 emissions decreased by 11% in the United States in 2020 primarily because of the effects of the COVID-19 pandemic and related restrictions.
Furthermore, U.S. energy-related CO2 emissions fell in every end-use (consumer) sector for the first time since 2012. The EIA notes:
“CO2 emissions associated with energy use fell by 12% in the commercial sector in 2020. Part of this drop in emissions was due to pandemic restrictions. Because electricity is a large source of energy for the commercial sector, the declining carbon intensity of electric power also contributed to declining CO2emissions from commercial activity. Emissions from commercial electricity use fell by 13%. Commercial petroleum and natural gas emissions fell by 13% and 11%, respectively.”
“Within the U.S. power sector, emissions from coal declined the most, by almost a fifth, at 19%. Natural gas-related CO2 emissions rose by 3%. Also of note in 2020; fossil fuel generation declined, while power generation from renewables from wind and solar continued to grow.”
As seen in the graph above, CO2 in the atmosphere increased during 2020 during the economy crippling lockdowns at the same rate it has been for decades. There isn’t even a blip.
This lack of any reduction in atmospheric CO2 concentration clearly demonstrates that no matter how much the U.S. reduces CO2 emissions, no one living today will, at any point in life, see a measurable change in climate attributable to the reduction. This is especially true since other countries, such as China, who only give lip-service to the CO2 emissions reduction demanded by the 2015 Paris Climate Accord.
by Kip Hansen, March 22, 2021 in WUWT
Dr. Judith Curry has been writing about Sea Levels and New Jersey [and here], spurred on by a request for an evaluation of the topic from the New Jersey Business & Industry Association(NJBIA). The NJBIA is concerned because a study by a team of sea level researchers at Rutgers University has called for “draconian policies unsupported by science” that would “harm our economy today” by overreacting to “legitimate concerns about climate change, sea level rise, and flooding”. Dr. Curry’s full report is titled: “Assessment of projected sea level rise scenarios for the New Jersey Coast”.
Dr. Curry’s CFAN report contains this summary:
The summary conclusions of the CFAN Review are:
— The sea level projections provided by the Rutgers Report are substantially higher than those provided by the IPCC, which is generally regarded as the authoritative source for policy making. The sea level rise projections provided in the Rutgers Report, if taken at face value, could lead to premature decisions related to coastal adaptation that are unnecessarily expensive and disruptive.
— Scenarios out to 2050 for sea level rise and hurricane activity should account for scenarios of variability in multi-decadal ocean circulation patterns.
— Best practices in adapting to sea level rise use a framework suitable for decision making under deep uncertainty. The general approach of Dynamic Adaptive Policy Pathways is recommended for sea level rise adaptation on the New Jersey coast.
I wrote a piece here at WUWT a year ago, titled “Atlantic City: I’ll meet you tonite…..”, prompted by the Governor of New Jersey’s executive order stating that “New Jersey has set a goal of producing 100 percent clean energy by 2050.” and “New Jersey will become the first state to require that builders take into account the impact of climate change, including rising sea levels, in order to win government approval for projects.” The sea level rise part of this executive order was based on an earlier draft of the same study by researchers at Rutgers University.
by R. Stein, Sept 21, 2021 in EurasiaReview
California, with 0.5 percent of the world’s population (40 million vs 8 billion) professes to be the leader of everything and through its dysfunctional energy policies imports more electricity than any other state – currently at 32 percent from the Northwest and Southwest – and has forced California to be the only state in contiguous America thatimports most of its crude oil energy demands from foreign country suppliers to meet the energy demands of the state.
State energy policies have made California electricity and fuel prices among the highest in the nation which have been contributory to the rapid growth of “energy poverty” for the 18 million (45 percent of the 40 million Californians) that represent the Hispanic and African American populations of the state.
Access to electricity is now an afterthought in most parts of the world, so it may come as a surprise to learn that 16 percent of the world’s population — an estimated 1.2 billion people — are still living without this basic necessity. Lack of access to electricity, or “energy poverty”, is the ultimate economic hindrance as it prevents people from participating in the modern economy.
Almost half the world — over three billion people — live on less than $2.50 a day. At least 80 percent of humanity, or almost 6 billion, lives on less than $10 a day. Other nations and continents living in abject poverty without electricity realize California, and large parts of the U.S. buying into green new deals, renewable futures, and zero-carbon societies are left with the dystopic reality of mass homelessness, filth and rampant inequality that increasingly characterize the GND core values.
by Roy Spencer, Feb 11, 2021 in GlobalWarming
SUMMARY: The Urban Heat Island (UHI) is shown to have affected U.S. temperature trends in the official NOAA 1,218-station USHCN dataset. I argue that, based upon the importance of quality temperature trend calculations to national energy policy, a new dataset not dependent upon the USHCN Tmax/Tmin observations is required. I find that regression analysis applied to the ISD hourly weather data (mostly from airports)Â between many stations’ temperature trends and local population density (as a UHI proxy) can be used to remove the average spurious warming trend component due to UHI. Use of the hourly station data provides a mostly USHCN-independent measure of the U.S. warming trend, without the need for uncertain time-of-observation adjustments. The resulting 311-station average U.S. trend (1973-2020), after removal of the UHI-related spurios trend component, is about +0.13 deg. C/decade, which is only 50%Â the USHCN trend of +0.26 C/decade. Regard station data quality, variability among the raw USHCN station trends is 60% greater than among the trends computed from the hourly data, suggesting the USHCN raw data are of a poorer quality. It is recommended that an de-urbanization of trends should be applied to the hourly data (mostly from airports) to achieve a more accurate record of temperature trends in land regions like the U.S. that have a sufficient number of temperature data to make the UHI-vs-trend correction.
The Urban Heat Island: Average vs. Trend Effects
In the last 50 years (1970-2020) the population of the U.S. has increased by a whopping 58%. More people means more infrastructure, more energy consumption (and waste heat production), and even if the population did not increase, our increasing standard of living leads to a variety of increases in manufacturing and consumption, with more businesses, parking lots, air conditioning, etc.
by Andy May, Nov 24, 2020 in WUWT
The United States has a very dense population of weather stations, data from them is collected and processed by NOAA/NCEI to compute the National Temperature Index. The index is an average temperature for the nation and used to show if the U.S. is warming. The data is stored by NOAA/NCEI in their GHCN or “Global Historical Climatology Network” database. GHCN-Daily contains the quality-controlled raw data, which is subsequently corrected and then used to populate GHCN-Monthly, a database of monthly averages, both raw and final. I downloaded version 4.0.1 of the GHCN-Monthly database on October 10, 2020. At that time, it had 27,519 stations globally and 12,514 (45%) of them were in the United States, including Alaska and Hawaii. Of the 12,514 U.S. stations, 11,969 of them are in “CONUS,” the conterminous lower 48 states. The current station coverage is shown in Figure 1.
Figure 1. The GHCN weather station coverage in the United States is very good, except for northern Alaska. There are two stations in the western Pacific that are not shown.
igure 4. The orange line is the uncorrected monthly mean temperature, which is “qcu” in NOAA terminology. The blue line is corrected, or NOAA’s “qcf.”
by Cap Allon, Nov 10, 2020 in Electroverse
After months of EOTW articles regarding California’s summer heat and largely self-inflicted wildfires, record COLD has now swept The Golden State — and the MSM has fallen eerily quiet…
Before Monday rewrote the record books in western California, back-to-back weekend storms on Friday and Sunday brought frigid temperatures and heavy snow to much of the state, reports ktvu.com.
A whopping 18 inches of snow blanketed the Sierra-at-Tahoe ski resort and a healthy 10 inches accumulated at Sugar Bowl over the weekend, prompting a travel advisory throughout the Sierra Nevada.
Weekend Snowfall Totals [ktvu.com].
Forwarding to Monday, a number of low temperature records were broken.
It dropped to 38F (3.3C) at the Oakland Airport Monday morning, a reading that smashed the old record of 41F set in 2009 (solar minimum of cycle 23).
Gilroy, located in Santa Clara County, also set new low Monday — the city’s official reading of 31F (-0.6C) in the early hours of Nov 9 busted the old record of 34F (1.1C) set back in 1986 (solar minimum of cycle 21).
by B. Lyman, Oct 27, 2020 in ClimateChangeDispatch
More than 20 million Americans are under some sort of winter weather watch, warning, or advisory from the Southwest through the Midwest as of Monday.
The Weather Channel has dubbed the storm “Winter Storm Billy” and said the storm will bring snow throughout parts of the Southern Rockies, the Central Plains, and Missouri.
From Arizona to Wisconsin, residents could see snowfall Monday, while those further south, like in Texas and Oklahoma, will see freezing rain and sleet, according to CNN.
Ice in Texas and Oklahoma is expected to accumulate roughly half an inch, which could cause dangerous travel conditions and knock power out, per the same article. Oklahoma City is under an Ice Storm Warning.
Temperatures in North Texas are roughly 25 degrees Fahrenheit below average. Texans living in the Texas Panhandle area could see one to two inches of snow during the area’s first Winter Storm Warning of the season, according to CBS Dallas-Ft. Worth.
While temperatures in Arizona won’t be as cold as some other states, some areas in the state could see a low of 46 degrees on Tuesday — the first temperature in the 40s since March, according to AZ Central.
Some areas of Colorado and New Mexico are expected to see two feet of snow, which comes as a bit of relief as wildfires continue to rage in Colorado’s Boulder and Larimer Counties, according to The Denver Channel. In Aguilar, Colorado, there were already 14 inches recorded from snowfall Sunday into Monday, per the same report.
by Cap Allon, Oct 27, 2020 in Electroverse
The GRAND SOLAR MINIMUM has taken out multiple low temperature records in Denver, Colorado of late, as a weak and wavy “meridional” jet stream sends Arctic air anomalously-far south.
Denver has detailed weather books dating all the way back to 1872. One thing they reveal is that on each and every October day in those past 148 years, the thermometer has never failed to reach at least 18F… until yesterday, that is.
On Monday, October 26, the mercury struggled to a high of just 16F — a new record for the coldest October high temperature ever recorded in Denver.
by T. Heller, Oct 20, 2020 in RealClimateScience
NOAA and NASA US temperature graphs have been massively altered over the past 20 years, to turn a 90 year cooling trend into a warming trend.
by Cap Allon, Oct 9, 2020 in Electroverse
I’m not trying to be facetious here, but I don’t know what other stance climate alarmists can take. Every data point –even those from warm-mongers NOAA– reveals that the North American continent is cooling.
Taking NOAA’s data as read, with its Urban Heat Island (UHI) bias, it still reveals a sharp cooling trend across the U.S. and Canada from 2015 through 2019. A trend that has continued into 2020 with the majority of regions suffering a late start to summer, and, now, an early beginning to winter.
North America is currently bracing for its sixth or seventh (I’ve genuinely lost count) Arctic blast of the season. By next Monday (Oct 19) an enormous mass of polar cold will have engulfed 90+% of the continent:
by Cap Allon, Oct 10, 2020 in Electroverse
Below I’ve compiled a list of the hottest and coldest temperatures ever recorded in each U.S. state, according to NOAA data. Surely, if catastrophic global warming was actually a thing then it would show up in the temperature records. Spoiler: it doesn’t, and a discussion on why follows the list.
– All-time highest temperature: 112° F (Centreville on Sept. 6, 1925)
– All-time lowest temperature: -27° F (New Market 2 on Jan. 30, 1966)
– All-time highest temperature: 100° F (Fort Yukon on June 27, 1915)
– All-time lowest temperature: -80° F (Prospect Creek on Jan. 23, 1971)
– All-time highest temperature: 128° F (Lake Havasu City on June 29, 1994)
– All-time lowest temperature: -40° F (Hawley Lake on Jan. 7, 1971)
All-time highest temperature: 120° F (Ozark on Aug.10, 1936)
– All-time lowest temperature: -29° F (Gravette on Feb.13, 1905)
– All-time highest temperature: 134° F (Greenland Ranch on July 10, 1913)
– All-time highest temperature: 114° F (Wisconsin Dells on July 13, 1936)
– All-time lowest temperature: -55° F (Couderay 7 W on Feb. 4, 1996)
– All-time highest temperature: 115° F (Basin on Aug. 8, 1983)
– All-time lowest temperature: -66° F (Riverside Ranger Station, Yellowstone National Park) on Feb. 9, 1933)
More than 210 degrees Fahrenheit separates the highest and the lowest temperatures on record in the United States, and it isn’t a coincidence that the majority of these temperatures records –for both hot and cold– occur during solar minimums.
This is because low solar activity weakens the jet stream, reverting its usual tight ZONAL flow to more of a wavy MERIDIONAL one. This violent “buckling” effect FULLY explains how regions can experience pockets of anomalous heat while others, even relatively nearby, can be dealing with blobs of record cold: basically, in the NH, Arctic cold is dragged anomalously far south and Tropical warmth is pushed unusually far north (for more see the two links below)
by K. Richard, Sep 24, 2020 in NoTricksZone
A new 1735-2015 temperature reconstruction (Heeter et al., 2020) using Western US tree ring proxies shows peak 1940s warmth and post-1950s cooling. This is the same region Dr. Michael Mann used tree ring data to construct his famous hockey stick graph.
A new Scandinavian temperature reconstruction (Seftigen et al., 2020) that’s “skillfull in characterizing past temperature changes over the past one to two millennia” finds there
by Cap Allon, Sep 20, 2020 in Electroverse
A nation-spanning mass of Arctic air has parked itself over the eastern half of North America of late, rewriting the record-books in many states, districts, and provinces, including in New York, Washington, and Ontario.
The city of Syracuse, NY tied an all-time record low of 34F (1.1C) on Saturday morning, just after 6AM, a feat originally achieved back in 1943–duringsolar minimum of cycle 17.
Buffalo also tied a low temperature record — the 38F (3.3C) registered on Saturday matched the record low for the day set back in 1995–solar minimum of cycle 22.
by V. Richardson, Sep 9, 2020 ClimateChangeDispatch
A burst of wild September weather brought a “climate crisis” warning Tuesday from Al Gore as Californians struggled with heat and wildfires, Atlantic storm trackers raced through the alphabet and Coloradans traded their flip-flops for snow boots.
California firefighters fought to contain 23 active fires that charred a record 2.3 million acres as the state headed into the peak of its fire season fueled by a heatwave. On Sunday, the Los Angeles County town of Woodland Hills set a record at 121 degrees.
“It reached a record high of 121 degrees F in LA county over the weekend,” Mr. Gore tweeted Tuesday. “Extreme heat is fueling a longer, more intense, and more destructive wildfire season in CA. This is what an unabated climate crisis looks like.”
In a warming climate, temperatures become more stable, not less, because the differences between the poles and the equator become smaller, Mr. Taylor said.
“Assuming for the sake of argument that a large temperature swing is a crisis like climate alarmists assert, global warming will make such temperature swings less likely and severe,” he said. “So this is happening despite our recent modest warming, not because of it.”
by World Nuclear News, September 1, 2020
The US Nuclear Regulatory Commission (NRC) has issued a final safety evaluation report (FSER) for NuScale’s small modular reactor. This is the first-ever FSER to be issued by the NRC for an SMR, and represents the completion of the technical review and approval of the design.
The NuScale design uses passive processes such as convection and gravity in its operating systems and safety features to produce about 600 MW of electricity. Twelve modules, each producing 50 MW, are submerged in a safety-related pool built below ground level. The NRC has concluded the design’s passive features “will ensure the nuclear power plant would shut down safely and remain safe under emergency conditions, if necessary”, it said. NuScale has also indicated to NRC it will apply for standard design approval of a version using 60 MW modules, the regulator said. This would require additional NRC review.
by P. Homewood, August 26, 2020 in NotaLotofPeopleKnowThat
It’s Not About The Climate
Nobody denies climate change is occurring and playing a role in warmer temperatures and heatwaves. Keeley notes that, since 1960, the variation in spring and summer temperatures explain 50% of the variation in fire frequency and intensity from one year to the next.
But the half-century since 1960 is the same period in which the U.S. government promoted, mostly out of ignorance, the suppression of regular fires which most forests need to allow for new growth.
For much of the 20th Century, U.S. agencies and private landowners suppressed fires as a matter of policy. The results were disastrous: the accumulation of wood fuel resulting in fires that burn so hot they sometimes kill the forest, turning it into shrubland.
The US government started to allow forests in national parks to burn more in the 1960s, and allowed a wider set of forests on public lands to burn starting in the 1990s.
“When I hear climate change discussed it’s suggested that it’s a major reason and it’s not,” Scott Stevens of the University of California, Berkeley, told me.
Redwood forests before Europeans arrived burned every 6 to 25 years. The evidence comes from fire scars on barks and the bases of massive ancient trees, hollowed out by fire, like the one depicted in The New York Times photograph.
“There was severe heat before the lightning that dried-out [wood] fuel,” noted Stevens. “But in Big Basin [redwood park], where fire burned every seven to ten years, there is a high-density of fuel build-up, especially in the forests.”
by H.S. Burnett, August 10, 2020 in ClimateChangeDispatch
Hurricane Isaias hadn’t even made landfall in the United States before the media began proclaiming Isaias was the result of human-caused climate change.
Not only is there no evidence for such a claim, but hurricane numbers have been declining as global temperatures modestly warm.
Also, even the United Nations Intergovernmental Panel on Climate Change (IPCC) disputes any connection between global warming and hurricanes.
by Arizona State University, August 2, 2020 in WUWT
A majority of the world population lives on low lying lands near the sea, some of which are predicted to submerge by the end of the 21st century due to rising sea levels.
The most relevant quantity for assessing the impacts of sea-level change on these communities is the relative sea-level rise – the elevation change between the Earth’s surface height and sea surface height. For an observer standing on the coastland, relative sea-level rise is the net change in the sea level, which also includes the rise and fall of the land beneath observer’s feet.
Now, using precise measurements from state-of-the-art satellite-based interferometric synthetic aperture radar (InSAR) that can detect the land surface rise and fall with millimeter accuracy, an Arizona State University research team has, for the first time, tracked the entire California coast’s vertical land motion.
They’ve identified local hotspots of the sinking coast, in the cities of San Diego, Los Angeles, Santa Cruz and San Francisco, with a combined population of 4 to 8 million people exposed to rapid land subsidence, who will be at a higher flooding risk during the decades ahead of projected sea-level rise.
“We have ushered in a new era of coastal mapping at greater than 1,000 fold higher detail and resolution than ever before,” said Manoochehr Shirzaei, who is the principal investigator of the NASA-funded project. “The unprecedented detail and submillimeter accuracy resolved in our vertical land motion dataset can transform the understanding of natural and anthropogenic changes in relative sea-level and associated hazards.”
The results were published in this week’s issue of Science Advances (DOI link here).
by Cap Allon, July 12, 2020 in Electroverse
Historical documentation destroys the man-made global warming theory.
While those in control of the temperature graphs are all too happy to fraudulently increase the running average, what they haven’t (yet) had the balls to do is rewrite the history books.
As Tony Heller uncovers on his site realclimatescience, NASA routinely cools the past and heats the present, so to give the illusion of a greater warming trend — and comparisons between old and new graphs instantly reveals this fraud:
In 1999, NASA’s James Hansen reported 0.5C US cooling since the 1930’s:
By 2016, the same NASA graph has eliminated that 1930-1999 cooling:
by Cap Allon, June 2, 2020 in Electroverse
Like April, May was cooler than average across the District,” admits filthy warm-mongers the washingtonpost.com in a recent article. The month officially logged an average temperature of just 63.8F, which is 2.2F below the 30-year average, and made for Washington’s coldest May in 15 years.
The average temperature more closely matched a typical May in New York City, points out the Southeast Regional Climate Center. And with NYC located some 200 miles north of Washington, May 2020 serves as a great illustration of how the GSM is driving the COLD LINE south.
The past two months also marked the first time since 2003 that both April and May were colder than average across the District.
In addition, May 9’s daily high of 52F was the lowest-high during the month of May since May 12, 2008 (solar minimum of cycle 23), and the chill even brought a few snow flurries to Washington’s far north and west suburbs. That 52F on May 9 also matched the record lowest-high for the date which was set way back in 1877 (solar minimum of cycle 11).
Many more all-time cold-records fell across the District that day; including Dulles smashing its record for min-high from 1977 (solar minimum of cycle 20), and Baltimore toppling both its all-time min-low from 1966 (solar minimum of cycle 19) as well as its min-high set back in 1977 (solar min of cycle 20)and 1947 (solar min of cycle 17).
by Ch. Rotter, May 31, 2020 in WUWT
Pseudo-green energy will wreak devastation, pretending to prevent exaggerated climate harm
“We had to destroy the village in order to save it.” The infamous Vietnam era quotation may or may not have been uttered by an anonymous US Army major. It may have been misquoted, revised, apocryphal or invented. But it quickly morphed into an anti-war mantra that reflected attitudes of the time.
For Virginians and others forced to travel the path of “clean, green, renewable, sustainable” energy, it will redound in modern politics as “We had to destroy the environment in order to save it.”
Weeks after Governor Ralph Northam signed Virginia’s “Clean Economy Act,” which had been rushed through a partisan Democrat legislature, Dominion Energy Virginia announced it would reach “net zero” greenhouse gas emissions by 2050. To do so, the utility company will raise family, business, hospital and school electricity bills by 3% every year for the next ten years – as these customers and state and local governments struggle to climb out of the financial holes created by the ongoing Coronavirus lockdown.
Just as bad, renewable energy mandates and commitments from the new law and Dominion’s “integrated resource plan” will have major adverse impacts on Virginia and world environmental values. In reality, Virginia’s new “clean” economy exists only in fantasy land – and only if we ignore “clean” energy CO2 emissions, air and water pollution, and other environmental degradation around the world.
Dominion Energy plans to expand the state’s offshore wind, onshore solar and battery storage capacity by some 24,000 megawatts of new “renewable” energy by 2035, and far more after that. It will retain just 9,700 MW of existing natural gas generation, and only through 2045, build no new gas-fired units, and retire 6,200 megawatts of coal-fired generation. This will reduce in-state carbon dioxide emissions, but certainly won’t do so globally. The company intends to keep its four existing nuclear units operating.
To “replace” some of its abundant, reliable, affordable fossil fuel electricity, Dominion intends to build at least 31,400 megawatts of expensive, unreliable solar capacity by 2045. The company estimates that will require a land area some 25% larger than 250,000-acre Fairfax County, west of Washington, DC. That means Dominion Energy’s new solar facilities will blanket 490 square miles (313,000 acres) of beautiful croplands, scenic areas and habitats that now teem with wildlife.
by Todd McLeish, May 27, 2020 U. of RhodeIsland in PhysOrg
A team of University of Rhode Island scientists and statisticians conducted a sophisticated quantitative analysis of a mass extinction that occurred 215 million years ago and found that the cause of the extinction was not an asteroid or climate change, as had previously been believed. Instead, the scientists concluded that the extinction did not occur suddenly or simultaneously, suggesting that the disappearance of a wide variety of species was not linked to any single catastrophic event.
Their research, based on paleontological field work carried out in sediments 227 to 205 million years old in Petrified Forest National Park, Arizona, was published in April in the journal Geology.
by D. Middleton, May 15, 2020 in WUWT
And it’s not Mauna Loa…
UH researchers reveal largest and hottest shield volcano on Earth
Posted on May 13, 2020 by Marcie Grabowski
In a recently published study, researchers from the University of Hawai‘i at Mānoa School of Ocean and Earth Science and Technology revealed the largest and hottest shield volcano on Earth. A team of volcanologists and ocean explorers used several lines of evidence to determine Pūhāhonu, a volcano within the Papahānaumokuākea Marine National Monument, now holds this distinction.
Geoscientists and the public have long thought Mauna Loa, a culturally-significant and active shield volcano on the Big Island of Hawai‘i, was the largest volcano in the world. However, after surveying the ocean floor along the mostly submarine Hawaiian leeward volcano chain, chemically analyzing rocks in the UH Mānoa rock collection, and modeling the results of these studies, the research team came to a new conclusion. Pūhāhonu, meaning ‘turtle rising for breath’ in Hawaiian, is nearly twice as big as Mauna Loa.
“It has been proposed that hotspots that produce volcano chains like Hawai‘i undergo progressive cooling over 1-2 million years and then die,” said Michael Garcia, lead author of the study and retired professor of Earth Sciences at SOEST. “However, we have learned from this study that hotspots can undergo pulses of melt production. A small pulse created the Midway cluster of now extinct volcanoes and another, much bigger one created Pūhāhonu. This will rewrite the textbooks on how mantle plumes work.”