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Researchers are investigating how an iron infusion from glacial meltwater might change Antarctica’s seas and the climate.
Rachel Feltman: Antarctica is the largest, coldest desert on the planet, with snowfall dropping less than six inches of water there each year. But for such a dry place, Antarctica has an outsize impact on the world’s oceans: the ice sheet that covers much of the continent contains most of Earth’s fresh water. You’ve probably heard that a lot of that ice is melting because of climate change and contributing to sea-level rise. But glaciers and ice shelves aren’t just made of frozen water. What else is the melt sending out to sea?
For Scientific American’s Science Quickly, I’m Rachel Feltman. You’re listening to the first episode of a four-part Fascination series on Antarctica.
For the next four Fridays, we’ll follow award-winning Brazilian journalist Sofia Moutinho as she travels on the Nathaniel B. Palmer, a U.S. icebreaker on a mission to help us understand how the climate crisis will unfold.
Today we’ll meet her on the ship as she and her fellow passengers encounter the fastest-melting glaciers and ice shelves on the continent.
Sofia Moutinho: I am on the bridge of the Nathaniel B. Palmer, a U.S. icebreaker that is slowly cruising along the coast of the coldest and most remote continent on Earth: Antarctica.
Thirty-five international researchers are onboard for a 60-day mission. Their goal is to collect thousands of gallons of water, plus lots of sea ice, to help uncover the future of our oceans and Earth’s climate.
Phoebe Lam: Ooh, what is that?
Moutinho: That’s Phoebe Lam, a chemical oceanographer at the University of California, Santa Cruz.
Lam: I think that’s land. That’s land—land ahoy [laughs]! Ooh, how exciting!
Moutinho: She is one of three scientists leading this cruise, and this is her third time in Antarctica.
Lam: Hey, it’s our first land since—a while.
Moutinho: Our journey started more than 20 days ago, when we left port in the small southern Chilean town of Punta Arenas at the end of November 2023.
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Anaissa Ruiz Tejada/Scientific American
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James' World 2 
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