Ocean
Researchers at the University of Rochester have identified a key mechanism for methane production in the open ocean, driven by phosphate scarcity. The discovery, published in Proceedings of the National Academy of Sciences, suggests warming oceans could boost these emissions, creating a potential climate feedback loop. This resolves a long-standing puzzle about methane in oxygen-rich surface waters.
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Scientists have determined that Earth's most powerful ocean current, the Antarctic Circumpolar Current, formed through shifting continents and strong winds rather than solely from opening ocean gateways. This development around 34 million years ago helped draw down atmospheric carbon dioxide, contributing to a global cooling that led to the Antarctic Ice Sheet. The findings come from climate simulations published in the Proceedings of the National Academy of Sciences.