Why speleothem δ¹⁸O records miss 100,000-year climate cycles in Southern China

PHYSorg
Jul 14, 2025, 9:39 am126 pts
A new study published in Proceedings of the National Academy of Sciences solves a long-standing climate mystery: Why don't the records of oxygen isotopes (δ18O) in cave formations like stalagmites—known as speleothems—from central southern China reflect the well-known 100,000-year cycles of ice ages seen…

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