6.1 -- 六一特辑听力1

知识 四级词汇之每日一词 第251期 2018-05-31 创建 播放:4396

介绍: Fasten your seat belts. It’s going to be a bumpy ride. Photographer Santiago Borja, a pilot based in Ecuador, snapped this shot of a colossal cumulonimbus cloud from an altitude of over 11,000 meters, while flying across the Pacific Ocean.
Known as the ‘King of Clouds’, these huge formations are the only t...

介绍: Fasten your seat belts. It’s going to be a bumpy ride. Photographer Santiago Borja, a pilot based in Ecuador, snapped this shot of a colossal cumulonimbus cloud from an altitude of over 11,000 meters, while flying across the Pacific Ocean.
Known as the ‘King of Clouds’, these huge formations are the only type of cloud to produce thunder, lightening and hail.
“Fuelled by strong ascending motion, parcels of moist air barrel upwards through the atmosphere forming deep cloud towers that can reach heights of 12 kilometers,” says Amanda Maycock, a climatologist at the University of Leeds. “Eventually, the air reaches a layer with rapid changes in temperature. This acts like a lid preventing further ascent and causes the cloud tops to spread out into an anvil, which can be seen in this image.
Cumulonimbus cloud cells are associated with blizzards, torrential rain, and most commonly, tropical storms. So if you’re flying through one, you can expect a bit of turbulence.

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