The Germany-based European Institute for Climate and Energy (EIKE) has posted its latest Klimaschau video, titled “Prähistorische Ozeanschichten als möglicher Faktor der Erwärmung (Prehistoric Ocean Layers as a Possible Factor in Warming):
The new video highlights a study from Rutgers University published in Nature Geoscience.
Researchers found that the rapid global warming phase at the end of the last ice age (around 18,000 years ago) coincided with the release of highly saline water—a “salt blob”—that had previously been trapped in the deep ocean.
Scientists have long suspected a link between deep ocean salinity and atmospheric CO2 levels during ice age cycles. Colder water holds more dissolved CO2. When marine organisms die, their carbon-rich remains sink into the deep sea. Variations in salinity act as a barrier, trapping this carbon in the deep ocean layers and preventing it from easily escaping back into the atmosphere.
Ocean currents and shifting layers can transport these deep, carbon-rich waters back to the surface. Once there, they oxidize and release large amounts of CO2 into the atmosphere, rapidly triggering a warming phase.
The Asymptotic Nature of Greenhouse Gases
The video notes that climate alarmists might equate this prehistoric CO2 release to modern industrial emissions. However, it argues this is oversimplified, asserting that greenhouse gases (like CO2 and methane) absorb radiation asymptotically—meaning their warming effect peaks at a certain limit rather than increasing indefinitely.
Historical Context (“Snowball Earth”)
It touches on the “Snowball Earth” phenomenon from 580 million years ago, when low atmospheric CO2 levels likely caused a super ice age.
The video concludes that because Earth’s current CO2 levels are historically low compared to the last half-billion years, even a slight drop can trigger cooling phases, whereas sudden releases of trapped ocean gases can quickly reverse this and instigate warm periods.
Watch the entire video (in German) on YouTube: https://www.youtube.com/watch?v=5NIx28vEstQ.
Last 45 years of UAH temperatures and Mauna Loa CO2 concentration data series show there is no positive transfer function, nore positive cross-correlation from atmospheric CO2 concentration towards global temperatures.
Other data series from ice cores over the last few hundred thousand years show that this is true at any timescale.
Conversely, there is a significative positive correlation from global temperatures to atmospheric CO2 concentrations.
Conclusion : the only plausible hypothesis is that temperatures variations cause CO2 concentration variations.
The opposite hypothesis (CO2 variations cause temperatures variations) can’t be anything but rejected by observations and statistical analysis of the data.
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