Name: 溶ける氷河の謎 (Melting Glacier Mystery)
Uploaded: 2021-01-14T05:37:21.000Z
Duration: 1 min 9 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

Scientists with NASA, CIRES and other institutions may have just solved an

an historic mystery. This is a story about how people affect the

sometimes unexpectedly. This is what we strive to understand at CIRES.

So here's the mystery: Glaciers in the Alps began to retreat abruptly in the

but it was cold in the region, still cold after a few centuries of a

Little Ice Age in Europe. Now the Industrial Revolution had

just begun in the 1860s, with  factories burning coal and other

It was too soon for that activity to have caused enough greenhouse warming to melt

So the scientists figured there must be something else going on, something that

Soot or black carbon from those factors popping up in Western Europe might do it, the team figured.

The researchers began to dig into what was known about how much black carbon was in the

Soot, when it lands on snow, can absorb sunlight and cause melt.

With models and observations of soot in snow and ice layers, they showed that

when you account for the effect of soot on snow,

the glacial retreat in the 1860s was no longer surprising.

It was an expected consequence of human activity.

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溶ける氷河の謎 (Melting Glacier Mystery)

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