New study improves scientists’ ability to reconstruct how the climate and ocean circulation changed in the past

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Researchers at iC3 have found a way to improve records of past high latitude ocean change using tiny plankton shells called foraminifera.

By growing these foraminifera under controlled cold-water conditions, the team has extended a key temperature tool into the range most relevant for subpolar and polar oceans. The study’s results matter for anyone using marine sediments to reconstruct past climate, ocean circulation and carbon cycle change.

A calibration for colder seas

The study led by Freya Sykes focused on Globigerina bulloides, a widespread species of foraminifera whose habitat ranges from the sub-tropics to the sub-polar regions.