Scientists just uncovered a 3 million-year climate mystery in Antarctic ice
Date:
April 24, 2026
Source:
Oregon State University
Summary:
Ancient Antarctic ice is revealing a surprising new chapter in Earth’s climate story, stretching back 3 million years. By analyzing tiny pockets of trapped air and rare gases, scientists have discovered that while the planet cooled significantly—especially in the oceans—levels of key greenhouse gases like carbon dioxide and methane changed only modestly. This unexpected mismatch suggests other powerful forces, such as shifting ice sheets, ocean circulation, and Earth’s reflectivity, played major roles in driving long-term climate change.
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Antarctic Ice Reveals Climate Secrets
Ancient ice reveals Earth cooled dramatically—with barely any drop in greenhouse gases. Credit: Shutterstock
Scientists studying ancient Antarctic ice are uncovering new details about how Earth's climate has changed over the past 3 million years. By analyzing both the ice and the tiny pockets of air trapped inside it, researchers are building a longer and more complete record of past climate conditions.
Two new studies published in the journal Nature reveal a surprising pattern. While the planet gradually cooled over this time, levels of heat-trapping greenhouse gases in the atmosphere declined only slightly.
A Long-Standing Climate Mystery
https://www.sciencedaily.com/releases/2026/04/260423031552.htm
