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  • Extreme cold weather in North America and blistering heat waves in South America have

  • been making headlines over the last few days with record breaking conditions on either

  • end of the temperature scale. Kim Ji-yeon takes a look at the extreme weather

  • conditions around the globe. Some cities like Milwaukee, St. Louis and

  • Chicago experienced sensory temperatures that dipped to below minus-50 degrees.

  • Around 14 counties in the state of New York declared a state of emergency due to the frigid

  • conditions, closing schools and airports. More than 5-hundred passengers taking regular

  • train services in Chicago were left stranded in their compartments for 14 hours when the

  • trains they were traveling in got stuck in ice and snow.

  • Experts attribute the rush of cold air due to something called a distorted polar vortex...

  • which is a circulation of strong, upper-level winds that normally surround the northern

  • pole in a counter-clockwise direction. Normally a polar low-pressure system keeps

  • the bitter cold air locked in the Arctic regions of the Northern Hemisphere,... but this can

  • become distorted and dip further south ... which is what much of the United States is experiencing

  • right now. But it's a different story on the southern

  • part of the hemisphere...where high pressure is bringing in the heat from the equator,

  • which is leading to extremely hot weather conditions.

  • In the northern part of Argentina, the mercury level shot up to 50 degrees, the highest in

  • the region in a century. At least 10 people have died due to the extreme

  • heat wave there. Some researchers say the Arctic airmass that

  • the U.S. is experiencing now could be related to global warming because it coincides with

  • unusually high temperatures in other regions that are usually cold at this time of the

  • year.

  • "Because we've got this very westerly jet stream blowing across the UK, it's tending

  • to draw a lot of warm air up from the Mediterranean and also from further afield such as the tropical

  • Atlantic, so lots of warm air moving up across Spain into Italy and parts of southeastern

  • Europe."

  • The U.S. National Weather Service says it expects this Arctic airmass to continue until

  • Friday. Kim Ji-yeon, Arirang News.

Extreme cold weather in North America and blistering heat waves in South America have

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B1 中級

異常気象下の世界 (The world under abnormal weather conditions)

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    VoiceTube に公開 2021 年 01 月 14 日
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