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Short Wave

Sea Camp: Why Are Ocean Currents Shifting?

Short Wave

NPR

Daily News, Nature, Life Sciences, Astronomy, Science, News

4.7 β€’ 6K Ratings

πŸ—“οΈ 7 July 2025

⏱️ 14 minutes

🧾️ Download transcript

Summary

A warming climate doesn't just affect dry land β€” it affects the ocean, too. For years, Earth's ocean has acted as a heat sink for climate change: A large part of the heat generated by human use of fossil fuels is being absorbed by the ocean. And while the deep sea is largely unaffected by this heat absorption, oceanographers have discovered that the upper ocean currents are accelerating. That acceleration has the potential for huge knock-on effects, including sea level rise, changing fish migration cycles, shifting storm patterns, and more.

This is the first episode of Sea Camp, Short Wave's summer series exploring the intriguing and otherworldly depths of the ocean. Follow us every Monday through August as we travel from the sunlit zone to the sea floor.

Interested in more stories about the ocean? Email us your question at [email protected].

Listen to every episode of Short Wave sponsor-free and support our work at NPR by signing up for Short Wave+ at
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Transcript

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0:00.0

The House of Representatives has approved a White House request to claw back two years of previously approved funding for public media.

0:07.6

The recisions package now moves on to the Senate. This move poses a serious threat to local stations and public media as we know it.

0:17.1

Please take a stand for public media today at goacpr.org.

0:22.6

Thank you.

0:24.3

You're listening to Shortwave from NPR.

0:30.1

Hey, shortwavers, it's Regina Barber and Emily Kwong.

0:33.3

And we are excited to announce the launch of Seekin.

0:38.7

Every Monday for the next eight weeks, we'll be traveling deeper and farther into the depths of the ocean.

0:45.2

From the sunlit zone to the twilight zone to the sea floor.

0:51.6

And we're going to start today right on the surface. Sitting beside us on a metaphorical

0:57.2

boogie board is producer Hannah Chin. Hi, Hannah. Hi, Emily. Hi, Gina. Today we're focused on how

1:04.4

the atmosphere and the ocean affect each other. I got to say, though, even though I grew up on the

1:09.2

West Coast going to the ocean every summer,

1:11.2

hunting in tide pools, watching sea lions, I didn't realize until recently that that same

1:15.7

ocean is also constantly affecting how we experience life on land.

1:21.0

Anyone who lives along the West Coast, the U.S., for instance, knows that we have really

1:24.5

mild winters, and that's a result of the fact that we have the ocean kind of mediating the weather there.

1:30.2

So this is Matt Luongo. He's climate scientists and a physical oceanographer at the University of Washington in Seattle.

1:36.6

In the northern hemisphere, the weather moves from the west to the east, and they're pretty strongly moderated by the ocean.

1:43.5

Yeah, I mean, I grew up in Washington State and California, and he's right.

1:47.2

Like, we do have very mild winters, but I never, like, put together.

1:51.7

It's because of the Pacific Ocean.

...

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