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北极在哪里

Where is the True North Pole?

地球的顶部是北极 地球的底部是南极 当然了……
The north pole is the top of the earth, and the south pole is the bottom, of course…
可惜地球是个球体 没有顶部和底部之分
except that the earth is kind of a ball, and they don’t really have tops and bottoms.
的确,地球不是一个正球体,它一直在太空中自转
Granted, the earth isn’t exactly spherical and it’s spinning through space – spinning
围绕着一条虚拟的轴自转
about an imaginary axis of rotation.
地轴穿过地球的其中一个点 就是这儿 在北冰洋
One of the points where that axis goes through the earth, right here in the arctic ocean,
2007年,俄罗斯人在海床插上他们的旗帜,那里就是北极
where the Russians planted their flag on the sea floor in 2007, is called the north pole…
更确切地说,那里是地理上的北极
or rather, it’s the “geographic” north pole.
因为 正如有不同的方法定义“年” 也有不同方法来定义北极
Because, just like there are different definitions for what a “year” is, there are different north poles.
例如 指南针不指向地理的或地球的北极
For example, compasses don’t point to the geographic, or spinning-top, north pole.
它们指向磁北极 那么其对立面就是 磁南极
They point to the MAGNETIC north pole, which is incidentally a magnetic south pole since opposites attract.
磁北极和南极是一个磁体
The magnetic north (actually south) pole and south (actually north) pole are an electromagnet
由地球外核液态铁中的电流涌动而成
caused by swirling convection currents in the earth’s liquid iron outer core.
地球自转极大影响着这些电流,所以地磁
These currents are heavily influenced by the rotation of the earth, so the magnetic field
与地轴大致成一直线——但并不完全准确 也并非一成不变
they generate roughly aligns with the earth’s axis of rotation – but not precisely, and not unchangingly.
一百年前 磁北极坐落在加拿大北部
A hundred years ago, the magnetic north pole was located in northern canada – over 2000km
位于地理北极向南2000多千米处
south of the geographic north pole.
从那以后它一直往西北移动 最近才移到
And it’s been moving consistently north-west since then, currently sitting in the middle
北冰洋中部 在地理北极向南450千米处 而且每年都向俄罗斯
of the Arctic Ocean 450km south of the geographic north pole, and drifting about 55 kilometers
移动约55千米
closer to Russia each year.
另外 磁南极并非正处于磁北极的对面
What’s more, the magnetic south pole is not on the exact opposite side of the earth from
它以一种自由的形式左摇右摆
the magnetic north pole – it drifts around in a somewhat independent fashion and is currently
而且 现在它比磁北极距赤道近20°
20° closer to the equator than magnetic north!
正是地球深处 难以理解的翻滚的铁水产生了地球磁场
Such is the nature of magnetic fields generated by confusingly swirly molten iron deep inside the earth.
但如果你换个想法 (想想)有根巨大且完美的条形磁铁竖在地球内部
But if you imagined, instead, that there were just a giant, perfect bar magnet inside the
而这根完美的条形磁铁会指向地磁北极
earth, then that perfect bar magnet would point towards the GEO-magnetic north pole.
而这正处在加拿大那怒维特的埃尔斯米尔岛上
Which is currently located in Ellesmere Island, Nunavut, Canada.
这个极点和地磁南极遥遥相对
This pole, together with the geomagnetic south pole which IS on the exact opposite side of
代表地球磁场的大致走向 特别是 它延伸到太空
the earth, represents the general, overall trend of the earth’s magnetic field, especially as it extends into space.
当它在地球表面对航海罗盘毫无用处时
So while it’s not at all useful for compass navigation on the earth’s surface, it does
却对太阳风粒子的路径产生很大的影响 并引起极光
heavily influence the paths of solar wind particles that cause the aurora – that is,
那就是北极光 美
the northern lights. Beautiful.
总之 北极在哪儿取决于你关心的是什么
In short, the north pole’s whereabouts depend on what you care about.
地球绕着“地理的”北极自转 指南针指向“磁”北极
The earth spins like a top around the “geographic” north pole, compasses point to the “magnetic”
(实际上是磁南极) 北极光
north pole (which is actually a magnetic south pole), and the northern lights are strongest
在“地磁”北极(也是磁南极)周围最炫
in a ring around the “geomagnetic” north pole (also a magnetic south pole).
这三个北极都在移动 磁极和地磁极移动地较快
All three north poles move, too – the magnetic and geomagnetic poles change quite drastically,
但 甚至地理北极也会因地球绕轴旋转产生的摇摆而每年移动10米
but even the geographic north pole moves up to ten meters a year as the earth wobbles
而这种摇摆是由于季风穿过地球产生的压强不同以及融化的冰盖等原因引起的
on its axis due to seasonal air pressure differences across the globe, melting ice caps, and so on.
假设2007年8月俄罗斯人把他们的旗帜正好插在地理北极上
Assuming that the Russians planted their flag exactly at the geographic north pole in August
并不会从那时起就一直在极点上 它在2009年的时候偏离12米远
2007, not once since then has it been exactly at the pole – it was as far as 12 meters away
2010年的时候很接近 只有20厘米 而现在偏离了3.5米远
in 2009 and as close as 20 cm in 2010 – right now it’s about 3 and a half meters away.
总的来说 地球正绕着俄罗斯的旗帜做着史上最大而又最缓慢的钢管舞
Basically, the earth is doing the biggest, slowest, pole dance ever around the Russian flag.

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译制信息
视频概述

北极其实是南极?南极其实是北极?北极到底在哪里?

听录译者

收集自网络

翻译译者

李门牙😄

审核员

审核团V

视频来源

https://www.youtube.com/watch?v=Roq20IV4yP0

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