Story perspectives

Antarctic Current's Formation Crucial for Climate Stability, Faces Warming Threat

4/9/2026

Summary

Story summary

New simulations show the Antarctic Circumpolar Current (ACC) formed around 34 million years ago and stabilizes climate by connecting with other ocean currents.
A proto-ACC developed as Australia and South America drifted north, isolating Antarctica.
Strong westerly winds through the Tasman Gateway were essential for the current to fully form.
Current warming trends may disrupt the ACC, potentially slowing it by 20% by 2050, harming ocean biodiversity and ice sheets.

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Story summary

New simulations show the Antarctic Circumpolar Current (ACC) formed around 34 million years ago and stabilizes climate by connecting with other ocean currents.
A proto-ACC developed as Australia and South America drifted north, isolating Antarctica.
Strong westerly winds through the Tasman Gateway were essential for the current to fully form.
Current warming trends may disrupt the ACC, potentially slowing it by 20% by 2050, harming ocean biodiversity and ice sheets.