Placeholder Image

字幕列表 影片播放

  • The polar vortex is upon us!

  • Sinners turn up your local heat sources, prepare for the oncoming snowpocalypse!

  • Where did this thing come from?

  • Hey cold ones, this is DNews, I'm Trace.

  • If you'd asked me about the POLAR VORTEX in 2013, I'd have assumed it was the bad

  • guy in some new cheesy superhero show.

  • In 2014, when a blizzard and cold system struck for some reason it got a new, catchy name:

  • the Polar Vortex.

  • It was so popular, Bloomberg joked it was in theuncontested leadforbuzzword

  • of 2014”

  • Thisnewmeteorological term was everywhere!

  • Except that, the polar vortex as you know it is a lie.

  • It's not new.

  • What the media dubbed 'the polar vortex' is really just the arctic or polar jet stream,

  • also known as one of theWesterlies,” or circumpolar vortex; we've known about

  • it for decades.

  • Though, now that we have a cute term for it, we're hearing it more!

  • You're not imagining things.

  • I'm about to say something confusing, but trust me on this.

  • The polar vortex is spilling out of the top of the planet... scientists thinkbecause

  • of global warming.

  • Yes, it's getting colder because it's getting warmer.

  • It's called thewarm Arctic-cold continentspattern.

  • Atmospheric science is complicated.

  • But, again, the polar vortex isn't a new thing.

  • In January 1985, we hit record cold temperatures, negative 34 degrees in North Carolina, paired

  • with blizzards in the Northeast -- even Florida was affected!

  • Then, in December of 1989, another very cold huge blizzard hit, dropping record snow and

  • dipping the temperature to zero in North Carolina . They didn't call it the polar vortex,

  • instead referring toCross-polar flowor the polar jet stream was pushing this cold

  • air onto us.

  • Blizzards and polar air hit in 1977, '78, '82 '85, '89.

  • In '93 they called itthe storm of the century!”

  • '96, 2008 you get it.

  • In 2014, a bit of this jet stream shifted, allowing polar air toslosh out of the

  • bowlon top of the planet.

  • Jet streams and low-pressure systems were hitting the U.S. almost every year -- all

  • thanks to this 'polar vortex.'

  • OK.

  • So.

  • What is this thing

  • Here is the top of the Earth, just chilling.

  • That is a sweet Earth you might say.

  • And that is the circumpolar vortex.

  • A.k.a.

  • 'The polar vortex.”

  • As the National Oceanic and Atmospheric Administration puts it: the jet stream iswobbling

  • because the circumpolar vortex is basically a low-pressure cold system that is held in

  • place, by the west-to-east moving jet stream.

  • But in recent years, the oval-shaped jet stream on top of our planet is breaking down.

  • It's been on this trend for decades.

  • And, a study in October 2016's Nature explores how climate change is a possible cause.

  • The warming of our planet is weakening the polar jet stream, reducing sea ice and causing

  • thissloshing of cold air.”

  • That cold air causes cold temperatures, and crazy winter weather.

  • On top of that, as the jet stream changes, the polar vortex is shifting from North America

  • to Europe and Asia.

  • You can secretly cheer, but you'd be wrong to do so.

  • A weaker polar jet stream means more cold air down away from the poles, not less -- it

  • might mean longer winters, with the polar vortex showing up in March.

  • This stuff is really complicated.

  • And, to further complicate things.

  • There are two polar vortices!

  • One circumpolar vortex floats in the stratosphere, which rests 50 kilometers above the Earth,

  • and another circumpolar vortex sits in troposphere (between 5 and 20 kilometers).

  • So what you're feeling on your frozen face, is just the influence of these polar winds,

  • not necessarily the polar winds themselves.

  • Whew.

  • This could get chilly.

  • Oh, and P.S. there are polar vortices at the bottom of the planet, too.

  • To be honest, as much as we humans love going to the beach, we can only hope that the cold

  • air stays cold.

  • Because if that sea ice melts, we're screwed.

  • Global warming.

  • Not only is it hotter, but it's colder too.

  • Why doesn't winter disprove global warming?

  • Don't worry.

  • Got the answer to that for you right here.

  • I remember cold, probably why I have a MOP of hair in that vid.

  • How do you feel about the media blowing up these winter norms?

  • Tell us about it down in the comments, make sure you come back here everyday for more

  • DNews and thanks for watching!

The polar vortex is upon us!

字幕與單字

影片操作 你可以在這邊進行「影片」的調整,以及「字幕」的顯示

B1 中級 美國腔

极地涡旋究竟是什么?它变得更糟了吗?(What Exactly Is The Polar Vortex & Is It Getting Worse?)

  • 2 1
    joey joey 發佈於 2021 年 04 月 28 日
影片單字