NPR

How Much Hotter Are The Oceans? The Answer Begins With A Bucket

Scientists need to track the history of sea temperatures precisely to model climate change. A newly discovered clue in measurements taken by sailors in the 1930s could have far-reaching implications.
Scientists are using statistics, history and computer modeling to understand exactly how much hotter the oceans are today then they were before industrialization. Harvard researchers just found a clue in shipping records digitized after WWII.

If you want to know what climate change will look like, you need to know what Earth's climate looked like in the past: what air temperatures were like, for example, and what ocean currents and sea levels were doing. You need to know what polar ice caps and glaciers were up to and — crucially — how hot the oceans were.

"Most of the earth is water," explains Peter Huybers, a climate scientist at Harvard University. "If you want to understand what global temperatures have been doing, you better understand, in detail, the rates that different parts of the ocean are warming."

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