Archives mensuelles : octobre 2024

climate-debate

The 2023 global warming spike was driven by the El Niño–Southern Oscillation

by S.P. Raghuraman et al., Oct 2024 in EGU-APCPapers

Abstract

Global-mean surface temperature rapidly increased 0.29 ± 0.04 K from 2022 to 2023. Such a large interannual global warming spike is not unprecedented in the observational record, with a previous instance occurring in 1976–1977. However, why such large global warming spikes occur is unknown, and the rapid global warming of 2023 has led to concerns that it could have been externally driven. Here we show that climate models that are subject only to internal variability can generate such spikes, but they are an uncommon occurrence (p = 1.6 % ± 0.1 %). However, when a prolonged La Niña immediately precedes an El Niño in the simulations, as occurred in nature in 1976–1977 and 2022–2023, such spikes become much more common (p = 10.3 % ± 0.4 %). Furthermore, we find that nearly all simulated spikes (p = 88.5 % ± 0.3 %) are associated with El Niño occurring that year. Thus, our results underscore the importance of the El Niño–Southern Oscillation in driving the occurrence of global warming spikes such as the one in 2023, without needing to invoke anthropogenic forcing, such as changes in atmospheric concentrations of greenhouse gases or aerosols, as an explanation.

Received: 24 Jun 2024 – Discussion started: 08 Jul 2024 – Revised: 04 Sep 2024 – Accepted: 23 Sep 2024 – Published: 10 Oct 2024
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climate-debate

Brown Bears Lived In The 73°N Siberian Arctic 3500 Years Ago…Today Their Northern Boundary Is 65°N

by K. Richard, Oct 14, 2024 in NoTricksZone

A new study provides still more evidence the Arctic was warmer than it is today as recently as a few thousand years ago.

In 2020 the well-preserved carcass of a Yakutian brown bear (Ursus arctos) was discovered buried in permafrost on the terrain of the treeless tundra Bolshoy Lyakhovsky Island in the Arctic Ocean, 73°N.

The Yakutian brown bear currently occupies only the forested regions of Eurasia, with a northern limit of northern Yakutia (Republic of Sakha), 65°N.

The female bear’s age has been dated to approximately 3500 years ago, during the Middle to Late Holocene. At that time the Arctic was warm enough at that latitude to support vegetation (grasses, shrubs) that only persist in the northern Yakutia region today.

The authors suggest brown bears may have been permanent residents of the Siberian Arctic’s islands from about 5000 years ago until a few thousand years ago, when, as today, the Arctic became too cold for the vegetation production requisite for their sustenance.

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climate-debate

El Niño fingered as likely culprit in record 2023 temperatures

by P. Voosen, Oct 10, 2024 in Science

For the past year, alarm bells have been going off in climate science: Last year’s average global temperature was so high, shooting up nearly 0.3°C above the previous year to set a new record, that human-driven global warming and natural short-term climate swings seemingly couldn’t explain it. Some, like famed climate scientist James Hansen, suggestedEarth is entering an ominous new phase of accelerated warming, driven by a rapid decline in sunlight-dimming air pollution. Others, like Gavin Schmidt, director of NASA’s Goddard Institute for Space Studies, said the rise might represent a “knowledge gap,” some new climate feedback that might tip the planet toward a future even warmer than models predict.

Now, a new series of studies suggests most of the 2023 jump can be explained instead by a familiar climate driver: the shifting waters of the tropical Pacific Ocean. The combination of a 3-year-long La Niña, which suppressed global temperatures from 2020 to 2022, followed by a strong El Niño could account for the unexpected temperature jump, the work suggests. “Earth can do this,” says Shiv Priyam Raghuraman, a climate scientist at the University of Illinois Urbana-Champaign, who led one study.

During La Niña, strong trade winds push warm surface water west along the equator toward Indonesia and pull up a fountain of deep, cold water in the eastern Pacific that helps cool the planet. During El Niño, the winds collapse, allowing warm water to slosh east and shut off the ocean air conditioner. Continuer la lecture de El Niño fingered as likely culprit in record 2023 temperatures →

better to know...?

«The Monster That Challenged the World»

by D. Middleton, Oct 10, 2024 in WUWT

Guest “When Sci-Fi predicted paleontology” by David Middleton

Anyone else out there remember this classically awful 1957 science fiction movie?

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By James Ashworth

First published 9 October 2024

Well-preserved fossils uncovered in France have revealed new insights into one of the biggest invertebrates to ever walk on Earth.

Arthropleura was a millipede-like animal which lived more than 300 million years ago during the Carboniferous Period, with some individuals reaching more than two metres long.

The head of one of history’s biggest arthropods has been revealed in detail for the first time.

Arthropleura is an arthropod, the group containing insects, crustaceans, arachnids and their relatives. For many years, only fossils of its body survived, which saw it placed among the earliest millipedes. Now, the discovery of the first complete head has revealed a surprising twist.

While the new fossils are not from fully grown Arthropleura, some of which reached 2.6 metres long, they reveal important characteristics. Most notably, the head has some features of early centipedes, suggesting millipedes and centipedes might be more closely related than previously accepted.

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Natural History Museum

While Arthropleura wasn’t a mollusk, the first thing I thought of when I read the article was The Monster That Challenged the World.

 

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climate-debate

NOAA’s Data Shows Rising Average Temps Driven By Growth And Measurement Flaws—Not Climate Change

by L. Hamlin, Oct 7, 2024 in ClimateChangeDispatch

NOAA’s U.S. contiguous U.S. summer measured minimum and maximum temperature trends (June through August) over the period 1895 through 2024 (shown below from NOAA’s Climate at a Glance Times series data website) show clear and distinct differing temperature trend increasing growth compared to the calculated average temperature trend outcome. [emphasis, links added]

The minimum temperature trend outcomes after 1985 climb significantly faster than the maximum measured temperature trend outcomes. U.S. population data shows an increase of about 100 million during the 1980 to 2023 period.

Since the average temperature is not a measured value but instead the calculated mathematical average of the minimum and maximum measured temperatures {(Tmax + Tmin)/2}, the average temperature-calculated trend outcome is controlled and dominated by the much larger increase occurring in the minimum-measured temperature trend versus the maximum measured temperature trend.

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better to know...?, climate-debate

Prophets Of Doom: Why A New 2024 Climate Report Is Fueled By Fear, Not Facts

by Dr M. Wielicki, Oct , 2024 in ClimateChange Dispatch 

The recent article published in BioScience, “The 2024 state of the climate report: Perilous times on planet Earth,” is a parade of exaggerated claims and half-truths, a propaganda piece designed to scare the public into adopting misguided policies while turning a blind eye to the real drivers of human progress. [emphasis, links added]

While it projects an image of scientific rigor, a closer look reveals that most of these dire warnings don’t even align with the IPCC‘s latest report, particularly when scrutinizing the IPCC AR6’s scientific foundations.

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better to know...?, climate-debate

Climate Activists Frustrated by IPCC’s Refusal to Link Extreme Weather with Carbon Emissions

by C. Morrison, Oct 10, 2024 in WUWT

Last June, the state-reliant BBC reported that human-caused climate change had made U.S. and Mexico heatwaves “35 times more likely”. Nothing out of the ordinary here in mainstream media with everyone from climate comedy turn ‘Jim’ Dale to UN chief Antonio ‘Boiling’ Guterres making these types of bizarre attributions. But for those who closely follow climate science and the assessments of the Intergovernmental Panel on Climate Change (IPCC), “such headlines can be difficult to make sense of”, observes the distinguished science writer Roger Pielke. In a hard-hitting attack on the pseudo-scientific industry of weather attribution, he states: “neither the IPCC nor the underlying scientific literature comes anywhere close to making such strong and certain claims of attribution”.

Pielke argues that the extreme position of attributing individual bad weather events is “roughly aligned” with the far Left. “Climate science is not, or at least should not serve as a proxy for political tribes,” he cautions. But of course it is. The Net Zero fantasy is a collectivist national and supra-national agenda that increasingly relies on demonising bad weather. With global temperatures rising at most only 0.1°C a decade, laughter can only be general and side-splitting when IPCC boss Jim Skea claims that British summers will be 6°C hotter in less than 50 years. Two extended temperature pauses since 2000 have not helped the cause of global boiling. In addition there are increasing doubts about the reliability of temperature recordings by many meteorological organisations that seem unable to properly account for massive urban heat corruptions.

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climate-debate

Of The Top 10 Deadliest Hurricanes in U.S. History, Most Occurred Over A Century Ago

by G. Martinez, Oct 7, 2024 in ClimateChangeDispatch

The 2024 Atlantic hurricane season is well underway, with forecasters predicting active and potentially dangerous conditions. … [emphasis, links added]

In late September, Hurricane Helene slammed into Florida’s Gulf Coast and drenched the Southeast, with devastating flooding taking a deadly toll in the mountains of North Carolina.

Here are the top 10 deadliest recorded hurricanes in U.S. history, according to the National Weather Service.

10. Last Island hurricane (1856)

The Last Island hurricane killed 400 people after slamming into the Louisiana coast in August 1856.

The highest points of the island were left under five feet of water in the wake of the storm, with the resort hotel and surrounding gambling establishments destroyed, according to NOAA.

The island itself was devastated, left void of vegetation, and split in half, NOAA said.

9. Labor Day hurricane (1935)

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