冰冻星球（2011）

--对于雄性冠海豹而言
for male hooded seals.
当它们六岁时，雄性会长出一个充气鼻子
When they're six years old, the males develop an inflatable nose.
它们已经准备好繁殖--
They're ready to breed -
他们的鼻子越大，
and the bigger their nose,
它们对雌性越有吸引力
the more attractive they will be to a female.
而现在这个人急于证明这一点
And now this one is eager to prove it.
一只雌性刚生完孩子
A female has just given birth.
一位母亲只花了四天时间给她的幼崽喂奶...
A mother spends a mere four days feeding milk to her pup...
...然后，也只有到那时，她才能准备好再次交♥配♥
...and then, and only then, will she be ready to mate again.
对于一个没有耐心的年轻人来说，等待的时间太长了
That is too long for an impatient youngster to wait around.
这些雌性似乎被一个更大的雄性占据
These females seem to have been claimed by a larger male.
但如果这位年轻海豹今年就繁殖，值得一试
But if this youngster is to breed this year, it's worth a try.
也可以使用充气鼻子
An inflatable nose can also be used
恐吓对手
to intimidate a rival.
他的虚张声势得到了回报
His bravado pays off.
他现在必须向善于倾听的雌性求爱
He must now woo the receptive female.
她似乎不为所动
She seems unimpressed.
但他还有另一个技巧
But he has another trick.
他的左鼻孔内有一个可扩张的囊
He has an expandable sac within his left nostril.
她的决定是什么？
What is her verdict?
雄海豹尾巴上被狠狠咬了一口...
A sharp nip on the tail...
...这意味着不行
...and that means no.
一年中只有一天可以交♥配♥，
With only one day in the year in which to mate,
可以理解，雌性的挑剔
the female is understandably choosy.
直到这个年轻人长出一个更令人印象深刻的气球鼻，
And until the youngster has grown a more impressive balloon,
否则，他不太可能被选中
he's unlikely to be chosen.
海豹呻♥吟♥
SEAL GROANS
难怪他泄气了
No wonder he's deflated.
春天不仅改变了海洋，
The spring not only transforms the ocean,
它还触发了一个重要事件
it also triggers an important event
在北极最大的岛屿上
on the biggest of the Arctic's islands.
格陵兰 - 超过 1,600 英里长
Greenland - over 1,600 miles long.
它被一个巨大的冰盖覆盖，
It's covered by a single gigantic ice sheet,
北半球最大的
the largest in the northern hemisphere.
随着春天的到来，冰面融化，
As spring advances, the surface of the ice melts,
形成晶莹剔透的湖泊...
forming crystal-clear lakes...
...宽达五英里
...up to five miles wide.
气候变化带来更高的温度，
Climate change is bringing higher temperatures,
所以融水越来越多
so there is more and more meltwater.
它流入一英里厚的冰盖...
It drains down into the mile-thick ice sheet...
...然后触发整个事件链
...and a whole chain of events is then triggered.
太空延时摄影揭示了接下来会发生什么
Time-lapse photography from space reveals what happens next.
增加的融水加速了冰盖滑下山坡
The increased meltwater accelerates the ice sheet's slide downhill.
最终，冰盖到达了海洋
Eventually, it reaches the ocean.
在这里，它分解成冰山，
Here, it breaks up into icebergs,
比帝国大厦还要高一些
some taller than the Empire State Building.
格陵兰岛今天的冰层流失速度比30年前快了六倍
Greenland is losing its ice six times faster today
与 30 年前相比
than it was 30 years ago.
它独自承担四分之一的
It alone is responsible for a quarter
全球海平面上升的原因
of the rise in global sea levels.
北极的变化已经在影响动物们的生活
Changes in the Arctic are already affecting the lives
这种高度专业化的野生动物
of its highly specialised wildlife.
北极熊
Polar bears.
这对一岁的双胞胎仍然依靠母亲的奶水、
These one year old twins still rely on their mother for her milk,
保护和重要的生存课程
protection and crucial survival lessons.
但是他们还没有完善自己的游泳技术...
But they have yet to perfect their swimming technique...
...他们迫不及待地想要练习
...and they can't wait to practise.
幼熊需要在水中像在家里一样
The cubs need to be as at home in the water
就像他们在海冰上一样
as they are on the sea ice.
他们的母亲叫他们出去
Their mother calls them out.
直到他们积累了大量的身体脂肪...
Until they've accumulated a significant layer of body fat...
...否则，他们会感到寒冷
...they feel the cold.
在雪地里打滚是擦干身体的好方法
A roll in the snow is a good way to dry off.
然后就回去继续玩...
Then it's back to play...
...当他们的母亲去打猎时
...while their mother heads off to hunt.
在接下来的几个月里，母亲必须提供她的幼崽
Over the coming months, a mother must provide her cubs
不仅有乳汁，有肉--
with not just milk, but meat -
还有很多
and lots of it.
到了盛夏，海冰变得如此稀薄...
By midsummer, the sea ice has become so thin...
...她抓住喜欢的猎物的最佳机会
...that her best chance of catching her preferred prey
是从水中伏击它
is by ambushing it from the water.
这是一种被称为水下潜近的技术
It's a technique known as aquatic stalking.
她顺风接近...
She approaches downwind...
...并试图进入一只髯海豹一米之内
...and tries to get within a metre of a bearded seal.
但是今天可以提供掩护的海冰越来越少，
But today there is less sea ice to provide cover,
所以她不得不瞄准风险更大的猎物
so she is having to target riskier prey.
冠海豹
The hooded seal.
它们的大小和髯海豹差不多，
They are about the same size as the bearded,
但更具侵略性和危险性
but more aggressive and dangerous.
她绕到另一边
She moves round to the other side.
北极现在变暖的速度是原来的两倍多
The Arctic is now warming more than twice as fast
和世界其他地方一样
as the rest of the world.
最早到 2035 年，海洋可能在夏季完全不结冰
The sea could be ice-free in summer by as early as 2035.
这将使北极熊妈妈更难
That will make it harder for mother polar bears
养活自己...
to feed themselves...
...更不用说他们的幼崽了
...let alone their cubs.
很适合在寒冷的环境中生活...
Well adapted to live in the cold...
...栖息在我们冰冻的土地和海洋中的动物
...the animals that inhabit our frozen lands and seas
比其他任何东西都需要的一件事...
need one thing more than any other...
...让地球停止变暖...
...and that is for the planet to stop warming.
现在由我们来实现这一点
It's now up to us to make that happen.
拍摄横跨我们冰冻星球的长度和宽度，
Filming across the length and breadth of our frozen planet,
团队最大的挑战之一是拍摄
one of the team's greatest challenges was to capture
格陵兰岛迅速融化的冰盖的震撼场面
the enormity of Greenland's rapidly melting ice sheet.
为此，剧组发起了五次独♥立♥的拍摄探险，
To do so, the crew launched five separate filming expeditions,
安装专门设计的防寒延时摄影机
installing specially designed cold-proof time-lapse cameras
那将运行三年
that were to run for three years.
甚至委托卫星记录全局变化
Even commissioning satellites to record the big-picture changes.
但如果没有记录，故事将是不完整的
But the story would be incomplete without documenting
本次活动的最后一场--
the finale of this event -
格陵兰贮存的冰川的崩解...
the calving of Greenland's Store Glacier...
...三英里长的冰墙...
...a wall of ice over three miles long...
...高达 120 米
...and towering 120 metres high.
剧组到达夏季融化的高峰，
The crew arrive at the height of the summer thaw,
在任何时候，破裂的冰块会屏障一个小镇的大小
when, at any moment, fracturing ice blocks the size of a small town
可能被落入海中
may be cast into the sea.
在接下来的三周里露营，
Camping out for the next three weeks,
团队利用持续的日光
the team takes advantage of the constant daylight
一年中的这个时候由遥远的北方提供
offered by the far north at this time of the year.
我们的冰川上有很多冰，一天 24 小时
We've got a lot of ice on the glacier, 24 hours a day.
所以，是的，我们准备好了
So, yeah, we're poised.
我从晚上 8 点左右开始，现在是，是的，就在 2:00 之后
I started at about 8pm, and it's currently, yeah, just after 2:00.
我想我今天早上要到凌晨 4 点
I've got until 4am this morning, I think.
他们希望成为第一批摄制组--
They're hoping to be one of the first film crews
使用照相无人机，进行前所未有的接近
to use a camera drone for unprecedented proximity
和全新的视角
and a brand-new perspective.
是的，它正在发生
Yeah, it's going.
不久之后，他们的新技术就受到了考验
It's not long before their new technology is put to the test.
很快揭示了它的局限性
But it quickly reveals its limitations.
无人机的问题 - 你必须打开它，
The issue with the drone - you've got to turn it on,
将它升空，然后飞到冰川前沿 1.5 公里处
get it in the air, and fly it 1.5km to the glacier fronts.
所以，如果你已经看到崩裂发生...
So, if you SEE a calving happening...
...那你来晚了
...then you're too late.
无人机只有20分钟的飞行时间，
With a flight time of just 20 minutes,
衡量起飞的时刻是至关重要的
gauging the moment of take-off is critical.
是的，我觉得今天就像我所做的每一个决定
Yeah, I feel like today just every decision I've made
一直是错误的
has been the wrong one.
很容易诱发自己去猜想，
It's really easy to trick yourself into thinking,
“哦，它会去的，它会去的，”所以你出去，
"Oh, it's going to go, it's going to go," so you get out there,
用完整个无人机的电池盘旋，回来，
use up a whole drone battery hovering, come back,