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better to know...?, climate-debate

Media Hypes Report That 2024 Will Break 1.5°C Limit, But Data Doesn’t Back It Up

by L. Lueken, Nov 11, 2024 in ClimateChangeDispatch

valencia flood aftermath

Multiple outlets have posted articles covering a report from the European Copernicus Climate Change Service (“Copernicus”) which says that 2024 will be the first to surpass 1.5°C warming since preindustrial times, which the media claims will cause untold weather disasters. [emphasis, links added]

This is mostly false.

Although 2024 will likely have higher average temperatures than in recent decades, it is not the end of the year yet, and there is limited evidence to support the claim that it will represent the highest temperatures humans have ever experienced and no evidence whatsoever that weather disasters have gotten or will get worse.

The BBC and CNN are among the numerous mainstream media outlets reporting on Copernicus’ report.

CNN describes the report as “devastating news for the planet that comes as America chooses a president that has promised to undo its climate progress both at home and abroad.”

The Copernicus group estimates that 2024 will end up 1.55°C hotter than the 1850-1900 average, which is 0.05°C above the warming limit set by the Paris Agreement. This may be true, but there is no evidence that the 1.5℃ threshold is some kind of deadly tipping point for weather disasters.

The same organization sounded the alarm last year that the “limit” was breached for several months in a row while ignoring natural factors like an underwater volcano eruption.

As for the 1.5-degree limit itself, it was not established by professional climate scientists. Only one of the people who were on the panel who came up with the value was even a meteorologist.

Two other points worth noting. The claim is a bit of sleight of hand, cherry-picking the data for comparison. Earth was only just coming out of the Little Ice Age at the onset of the 1850 period, one of the coldest periods during the past millennia.

When you pick an unusually cold period for comparison, modest warming seems more dramatic than it is.

Second, the 1.5℃ is an arbitrary temperature choice. As Climate Realism has discussed repeatedly here, here, and here, it was chosen by politicians for political reasons.

There is no scientific evidence it represents some tipping point for catastrophic climate change. The world has likely warmed more than 2°C since the 1700s, with no apocalypse.

One would think that if warming causes more extreme weather there would be solid data and identifiable consistent trends showing an increase in extreme weather, but there is none.

Three of the weather events CNN cites at the end of their article as proof of a supposed climate emergency, Hurricane Milton, the flooding in Spain, and low snow amounts at Mt. Fuji are not proof of a climate emergency.

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better to know...?, climate-debate

New Study: Human Contribution To Enhancement Of Earth’s Greenhouse Effect A Negligible 0.2 Percent

by K. Richard, Nov 12, 2024 in NoTricksZone

“[T]he contribution of CO2 to the greenhouse effect is 4% – 5%. Human CO2 emissions represent 4% of the total, which means that the total human contribution to the enhancement of the greenhouse effect is 0.16% to 0.20% – a negligible effect.” – Dr. Demetris Koutsoyiannis (2024)

New research exposes the vacuousness of the “imaginary world” models proclaiming CO2 the dominant regulator of the Earth’s climate.

A CO2-less or CO2-only atmosphere…an imaginary-world thought experiment

An oft-heard claim is that, due to the prominence of CO2 as the Earth’s climate “control knob” (see Lacis et al., 2010), the greenhouse effect could not exist – indeed, it would collapse – if there was no CO2 in the atmosphere.

However, it should go without saying that this CO2-less atmospheric condition itself is an imaginary-world conceptualization. Thus, fantasizing about what would happen if the atmosphere was comprised 0 ppm CO2, 1,000,000 ppm CO2, 0 ppm water vapor…are all just untestable, never-observable thought experiments. They cannot be subjected to the scientific method. Thus, they are unfalsifiable.

CO2’s climate effects are undetectable

Of course, this very unfalsifiable thought experiment is what believers in the CO2-is-the-climate-control-knob narrative rest their case on. But even if we do use this imaginary-world premise, the existing models (MODTRAN, HITRAN) that allegedly support the CO2-controls-climate orthodoxy actually undermine it.

For example, as Dr. Koutsoyiannis points out in his extensively-referenced paper, the MODTRAN data show that the Earth’s temperature remains at the default greenhouse-effect value if the water vapor scale is adjusted upwards slightly, by just 30%. The greenhouse effect does not “collapse” as claimed by Lacis et al. disciples – the control-knob believers.

The HITRAN database also indicates the imaginary-world condition of doubling CO2 from 400 to 800 ppm would only alter the radiation flux at the top of the atmosphere by -1.1%, a hypothetical realization that could not even be detected in future macroscopic measurements (if the atmosphere ever were to reach a CO2 concentration of 800 ppm).

MODTRAN models further affirm that (1) there is only a 1% temperature difference between either doubling (800 ppm) or halving (200 ppm) the atmospheric CO2 concentration, and (2) the change in the downwelling radiation resulting from an increase from 300 ppm (1900) to 420 ppm (2023) is only 0.5%. These tiny changes “could not be discerned by observations.”

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climate-debate

Despite Media Panic, There Is No Reason to Think 2024’s Warming Is Disastrous

by L. Lueken, Nov 10, 2024 in WUWT

Multiple outlets have posted articles covering a report from the European Copernicus Climate Change Service (“Copernicus”) which says that 2024 will be the first to surpass 1.5°C warming since pre-industrial times, which the media claims will cause untold weather disasters. This is mostly false. Although it is likely that 2024 will have higher average temperatures than in recent decades, it is not the end of the year yet, and there limited evidence to support the claim that it will represent the highest temperatures humans have ever experienced and no evidence whatsoever that weather disasters have gotten or will get worse.

The BBC and CNN are among the numerous mainstream media outlets reporting on Copernicus’ report.

CNN describes the report as “devastating news for the planet that comes as America chooses a president that has promised to undo its climate progress both at home and abroad.”

The Copernicus group estimates that 2024 will end up 1.55°C hotter than the 1850-1900 average, which is 0.05°C above the warming limit set by the Paris Agreement. This may be true, but there is no evidence that the 1.5℃ threshold is actually some kind of deadly tipping point for weather disasters. The same organization sounded the alarm last year that the “limit” was breached for several months in a row, while ignoring natural factors like an underwater volcano eruption. As for the 1.5 degree limit itself, it was not established by professional climate scientists. Only one of the people who were on the panel that came up with the value was even a meteorologist.

Two other points worth noting. The claim is bit of sleight of hand, cherry picking the data for comparison. Earth was only just coming out of a little ice age at the onset of the 1850 period, one of the coldest periods during the past millennia. When you pick an usually cold period for comparison, a modest warming seems more dramatic than it is.

Second, the 1.5℃ is an arbitrary temperature choice. As Climate Realism has discussed repeatedly, here, here, and here, for example, it was chosen by politicians for political reasons. There is no scientific evidence it represents some tipping point for catastrophic climate change. It is likely that the world has warmed more than 2°C since the 1700s, with no apocalypse.

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