How Oxygen Isotopes Reveal Ancient Climate
January 31, 2026
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0:56Now PlayingHow Oxygen Isotopes Reveal Ancient Climate
YouTube Description
as posted by the channelOne of the most powerful tools for reconstructing ancient climate comes from oxygen isotopes.
Most oxygen in nature is oxygen-16, but a heavier form, oxygen-18, also exists. These isotopes move through ocean water differently and become locked into the shells of marine organisms as they form.
By measuring the ratio of oxygen-16 to oxygen-18 preserved in fossil shells, scientists can track changes in ocean temperature, ice volume, and global climate stretching back hundreds of thousands of years.
Tiny atoms. Massive climate history.
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