From the archive: Why glaciers melted millions of years ago might tell us something about what’s happening today.
The JOIDES team snapped this image on their transit through the ice near Antarctica. Earlier this week, an international team of geologists and climate scientists parked their ship off the coast of West Antarctica and started drilling. Their mission: To find out why glaciers here melted millions of years ago and what that can tell us about what’s happening today.
“This expedition is really exciting, and particularly to me because I’ve been working on it for 10 years,” says Shevenell. Every day from now through early March, Shevenell and her colleagues will work a 12-hour shift. Drill staff will pull up cores from the ocean depths and hand them off to scientists for examination in the ship’s laboratory.
“We can combine all that data and try to understand times where ocean temperatures were warm, and we can look at times where oceans weren’t as warm,” she says. But atmospheric carbon dioxide levels were also changing around the same time, leading some to believe that greenhouse gases were the main cause of Antarctica’s icy shift.
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