{"id":418581,"date":"2025-12-25T19:44:38","date_gmt":"2025-12-25T18:44:38","guid":{"rendered":"https:\/\/climatescience.press\/?p=418581"},"modified":"2025-12-25T19:46:10","modified_gmt":"2025-12-25T18:46:10","slug":"claim-anthropogenic-global-warming-could-lead-to-a-new-ice-age","status":"publish","type":"post","link":"https:\/\/climatescience.press\/?p=418581","title":{"rendered":"Claim: Anthropogenic Global Warming Could Lead to a New Ice Age"},"content":{"rendered":"\n
\"A<\/figure>\n\n\n\n

From Watts Up With That?<\/a><\/p>\n\n\n\n

Essay by<\/strong> Eric Worrall<\/a><\/p>\n\n\n\n

\"Illustration<\/figure>\n\n\n\n

Never mind that Earth has endured far more warming than today\u2019s world without revisiting the extremes of the ancient past.<\/p>\n\n\n\n

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Global warming could trigger the next ice age<\/strong><\/p>\n\n\n\n

Earth\u2019s climate control system may cool so hard after warming that it freezes the planet over.<\/p>\n\n\n\n

Date:December 21, 2025<\/p>\n\n\n\n

Source:University of California \u2013 RiversideSummary:Scientists have uncovered a missing feedback in Earth\u2019s carbon cycle that could cause global warming to overshoot into an ice age. As the planet warms, nutrient-rich runoff fuels plankton blooms that bury huge amounts of carbon in the ocean. In low-oxygen conditions, this process can spiral out of control, cooling Earth far beyond its original state.<\/strong> While this won\u2019t save us from modern climate change, it may explain Earth\u2019s most extreme ancient ice ages.<\/p>\n<\/blockquote>\n\n\n\n

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\u2026<\/p>\n\n\n\n

Why Ancient Ice Ages Were So Extreme<\/strong><\/p>\n\n\n\n

Geological records, however, tell a more dramatic story. Evidence shows that some of Earth\u2019s earliest ice ages were so severe that ice and snow covered nearly the entire planet.<\/strong> According to the researchers, this level of freezing cannot be explained by a climate system that simply fine tunes itself.<\/p>\n\n\n\n

\u2026<\/p>\n\n\n\n

The Role of Oceans, Nutrients, and Plankton<\/strong><\/p>\n\n\n\n

The newly identified factor involves how carbon is buried in the ocean. As atmospheric CO2<\/sub> rises and temperatures increase, rainfall carries larger amounts of nutrients such as phosphorus into the sea. These nutrients stimulate the growth of plankton, microscopic organisms that absorb carbon dioxide through photosynthesis.<\/p>\n\n\n\n

\u2026<\/p>\n\n\n\n

In warmer conditions, however, this system changes. Increased plankton growth can reduce oxygen levels in the ocean. With less oxygen available, phosphorus is more likely to be released back into the water instead of being permanently buried. This recycled phosphorus fuels even more plankton growth, whose decay further depletes oxygen and keeps nutrients circulating.<\/p>\n\n\n\n

\u2026<\/p>\n\n\n\n

A Climate System That Can Overshoot<\/strong><\/p>\n\n\n\n

Rather than gently stabilizing Earth\u2019s temperature, this feedback can drive cooling well past its original starting point.<\/strong> In the team\u2019s computer simulations, the effect was strong enough to trigger an ice age.<\/p>\n\n\n\n

\u2026<\/p>\n\n\n\n

As human activity continues to add CO2<\/sub> to the atmosphere, the planet is expected to keep warming in the near term. The researchers\u2019 model suggests that a cooling rebound will eventually follow. However, this future cooling is likely to be less extreme because higher oxygen levels reduce the strength of the nutrient feedback in the oceans.<\/strong>

\u2026Read more: https:\/\/www.sciencedaily.com\/releases\/2025\/12\/251221043231.htm<\/a><\/p>\n<\/blockquote>\n\n\n\n

Terrific piece of alarmist writing. After talking about snowball Earth for most of the article, they finally admit near the end that any future ice age overshoot will be less extreme because today\u2019s world has higher oxygen levels in the atmosphere.<\/p>\n\n\n\n

But if the current warming trend falters or even flips into a decline, like global temperature declined between 1940 and 1970, see they predicted it. It\u2019s still all our fault.<\/p>\n\n\n\n

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The 1970s Global Cooling Consensus was not a Myth<\/a><\/blockquote>