Southern Ocean may be less of a carbon sink than we thought

June 5, 2019

Researchers Alison Gray and Seth Bushinsky are featured in this Science News article on SOCCOM float measurements of Southern Ocean carbon dioxide fluxes.

Photo courtesy of Hannah Zanowski

The Southern Ocean may be less of a carbon sink than we thought

The water surrounding Antarctica may be belching more CO2 than it takes in

BY ALEXANDRA WITZE       6:00AM, JUNE 2, 2019

The vast stretch of icy water that separates Antarctica from other continents is a dark mystery to most people. Polar explorer Ernest Shackleton, one of the few who have been to the Southern Ocean, regarded its storm-wracked seas with fear and awe. After ice floes trapped and crushed the three-masted Endurance in 1915, Shackleton made an epic rescue attempt, sailing 1,300 kilometers to bring help to his stranded crew. He crossed the Southern Ocean’s waters in a small open boat, threatened by what he called “uprearing masses of water, flung to and fro by Nature in the pride of her strength.”

Yet this remote, tempestuous ocean also benefits humankind. Scientists estimate that each year, the Southern Ocean slurps up more than 40 percent of the carbon dioxide that people release by burning fossil fuels for electricity, heat and transportation. That makes the ocean a powerful support system for slowing the buildup of heat-trapping greenhouse gases in the atmosphere. The more carbon this immense body of water takes up, the less accumulates in the atmosphere to warm the planet. (read more)