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Plate Tectonics Drives Ocean Oxygenation – ?


Peer-Reviewed Publication

CNRS

Dark, organic-rich sediments indicating conditions of low ocean oxygenation, sandwiched between limestone beds.
IMAGE: DARK, ORGANIC-RICH SEDIMENTS INDICATING CONDITIONS OF LOW OCEAN OXYGENATION, SANDWICHED BETWEEN LIMESTONE BEDS. view extra CREDIT: © CHRISTOPHE THOMAZO

Till now, it has been assumed that the oxygenation of the oceans over geological timescales has primarily been pushed by atmospheric oxygen ranges. Nonetheless, a brand new examine printed in Nature on June 27 2022  suggests in any other case. Work by scientists on the Biogeosciences Laboratory (CNRS/UBFC), along with their colleagues on the College of California’s Division of Earth and Planetary Sciences, exhibits that the motion of tectonic plates has in all probability contributed to ocean oxygenation. To display this, the scientists used a three-dimensional local weather mannequin to recreate situations on Earth from 540 million years in the past to the current day, particularly considering ocean circulation currents. Of their mannequin, the scientists modified the place of the continents whereas conserving the atmospheric oxygen focus fixed. The end result was that the oxygen focus within the oceans elevated, regardless of a relentless stage of oxygen within the ambiance. The brand new paper thus exhibits for the primary time that atmospheric and oceanic oxygen ranges are largely unbiased of one another. Since oxygen is significant to marine life, these findings reveal the hitherto underestimated position performed by plate tectonics within the evolution of biodiversity within the oceans over geological time scales.


JOURNAL

Nature

DOI

10.1038/s41586-022-05018-z 

METHOD OF RESEARCH

Computational simulation/modeling

SUBJECT OF RESEARCH

Not relevant

ARTICLE TITLE

Continental configuration controls ocean oxygenation in the course of the Phanerozoic

ARTICLE PUBLICATION DATE

17-Aug-2022



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