Warm Oceans Had Less Oxygen, Show Microfossils

By pairing chemical analyses with micropaleontology, the study of tiny fossilized organisms, researchers believe they can decipher how global marine life was affected by a rapid warming event more than 55 million years ago.   The work revolves around the Paleocene-Eocene Thermal Maximum (PETM), a well-studied analogue for modern climate warming. Documenting the expansion of OMZs during the PETM is difficult because of the lack of a sensitive, widely applicable indicator of dissolved oxygen.   read more

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