狂野地球（2020）

地球是一个动荡不安的地方
Earth is a restless place.
季节变化是由围绕太阳的公转决定的
Its seasons driven by the orbit around our sun.
一段史诗般的旅程决定了所有生命的节奏
An epic journey that sets the rhythms of all life.
人类通过仪式和庆祝来纪念这一时刻
Humans honour this passage through ritual and celebration.
大自然用自己的模式来记录这一循环
Nature marks the cycle with its own patterns.
在一年的时间里，
Over the course of a year,
地球上最壮观的迁徙行动，
the planet's most spectacular events of migration,
开始了重生与蜕变
rebirth and transformation unfold.
每时每刻，
Moment by moment,
月复一月，
month by month,
在地球上狂野的一年里
throughout a wild year on Earth.
狂 野 地 球
七月 – 八月
迁徙季节
7月初，太阳充沛的能量集中在北半球
Early July sees the sun's abundant energy focused on the northern hemisphere.
强烈的光和热在北极的冰盖上起着催化剂的作用，
Intense light and heat act as catalysts on the ice caps of the Arctic,
当它们开始移♥动♥和融化
as they start to shift and thaw.
水雕刻出垂直的河流，这些河流深深地坠入冰冻的深渊
Water carves vertical rivers that plummet deep into the frozen abyss.
冰冷的景色加速了它流向大海的速度
The icy landscape accelerates its flow towards the sea.
巨大的断层线出现了
Huge fault lines appear.
总得给点什么
Something has got to give.
这是冰山崩解的季节
This is iceberg calving season.
格陵兰的冰原
The ice sheets in Greenland
在融化过程中，每年有数十亿吨♥的冰脱落
shed billions of tons of ice a year during the melt.
近年来，
In recent years,
融化季节开始得更早，持续时间更长
the melt season has started earlier and is lasting longer.
现在，夏季融化的冰比冬季补充的冰还要多
Now,more ice melts in the summer than gets replenished over winter.
冰的总体损失已成为灾难性的
The overall loss of ice has become catastrophic.
30年前，
30 years ago,
格陵兰岛的冰原每年夏天会融化250亿吨♥的冰
Greenland's ice sheets would melt 25 billion tons of ice each summer.
上一季，
Last season,
在融化过程中损失了6000亿吨♥冰
more than 600 billion tons of ice was lost in the melt.
气候确实在变化
The climate is truly changing.
冰川融化
The glacial melt
在斯瓦尔巴特群岛的一些世界上营养最丰富的水域
adds to some of the world's most nutrient-rich waters in the Svalbard archipelago.
到七月，
By July,
数以百万计的海鸟从南方迁徙，24小时不间断地觅食
millions of seabirds have migrated from the south to feed around the clock in 24-hour daylight.
这是鸟类繁殖和养育后代的理想场所
It's an ideal place for birds to breed and raise their young.
海雀已经选择在岛上悬崖底部的碎石坡筑巢
Auks have chosen to nest in the scree slopes at the base of the island's cliffs.
对于那些在冬季觅食的北极狐来说，
For Arctic foxes that have spent the winter scavenging,
这是狩猎的最佳时机
it's a perfect time to hunt.
卵保护得很好，
The eggs are well protected,
但成年鸟还是要冒险出去
but the adult birds still have to venture out.
不过，正面攻击他们很少奏效
Though,attacking them head-on rarely works.
海雀太快了
The auks are just too quick off the mark.
需要的是一些出名的狡猾狐狸
What's required is some of that famous fox cunning.
幸运的转机不会有什么坏处
And a lucky break wouldn't hurt.
一只海鸥也在捕猎中
A gull is also on the hunt.
来自上面的威胁在一瞬间分散了海雀的注意力
The threat from above distracts the auks for a split second.
狐狸只需要一瞬间
And a split second is all the fox needs.
他智胜海雀
He has outfoxed the auks.
许多海雀物种通过在不稳定的悬崖上筑巢来避免被捕食
Many auk species avoid predation by nesting on the precarious cliffs.
他们的栖居地越危险，他们就越安全
The more perilous their perch,the better off they are.
每一对都只有一个珍贵的后代
Each pair only have one precious offspring.
幼鸟孵出才三周
It's only three weeks since the chick has hatched.
但它已经迫不及待地想离开巢穴了
But already,it's eager to leave the nest.
这是首航
It's quite the maiden flight.
几百米到了安全的海洋
Hundreds of metres to the safety of the ocean.
每年夏天，
And every summer,
一只勇敢的幼鸟是第一个跳起来的
one brave chick is the first to take the leap.
这更像是坠落而不是飞行，因为它们小小的翅膀就像降落伞
It's more like falling than flying as their tiny wings act as a parachute.
但他们的父亲却跟着他们
But their fathers follow them down.
帮助他们向水上登陆
Helping to steer them towards a water landing.
很快，天空开始布满了跳伞者
Soon,the sky begins to fill with jumpers.
还有他们的陪护
And their chaperones.
几天之内，
In just a few days,
10万只幼鸟要跳了
100,000 chicks will take the leap.
没有人能独自完成
None do it alone.
但并非所有人都能成功
But not all make it.
有些人在充满饥饿的食肉动物的危险着陆地带落空
Some fall short on a dangerous landing strip filled with hungry predators.
幸运的是，爸爸就要来了
Luckily,Dad is about.
从这里，快速冲向大海
And from here,it's a quick dash to the sea.
到了水里的幼鸟没有时间休息
The chicks that make it to the water have no time to rest.
没有足够的力量再次升空，
Not strong enough to take to the air again,
幼鸟们开始了英勇的迁徙，
the chicks now commence a heroic migration,
游到冰岛附近海域
swimming to waters off Iceland.
甚至远在北美
Even as far as North America.
1000多公里外
Over 1,000 kilometres away.
在阿♥拉♥斯加，
In Alaska,
大地也在褪去它冰冷的外衣，
the land is also shedding its icy cloak,
当溪水奔向大海时
as streams splash towards the sea.
这些变化引发了另一位伟大旅行者的到来
These changes trigger the arrival of another great traveller.
大马哈鱼正返回布里斯托尔湾，
Sockeye salmon are returning to Bristol Bay,
他们出生的地方
the place they were born.
他们从深海迁徙了几千公里，
They have migrated thousands of kilometres from the deep ocean,
像指南针一样利用地球磁场
using the earth's magnetic field like a compass.
他们家乡的味道从出生起就深深地印在他们的记忆里
The smell of their home stream has been imprinted in their memory since birth.
棕熊热切地期待着它们的到来，
Their arrival is keenly anticipated by brown bears,
当鲑鱼回来的时候，他们开始聚集在海湾的岸边
who start gathering along the banks of the bay as the salmon return.
他们是来参加泰迪熊终极野餐的
They've come for the ultimate teddy bears' picnic.
当鲑鱼耗尽最后的能量产卵时，
As the salmon exhaust the last of their energy to spawn,
他们到达了生命周期的尽头
they reach the end of their life cycle.
似乎死亡之河实际上是一个至关重要的再生
What seems like a river of death is actually a vital regenesis.
河流通常把营养物质带到海里
Rivers usually take nutrients out to sea.
但在这里，
But here,
每年的产卵都会将营养物质返回河流
the annual spawning returns nutrients to the rivers.
不仅喂熊，
Feeding not just the bears,
还有，周围数公里的树木
but also,the trees for kilometres around.
这是一个每年都会重置的循环，
It's a cycle that is reset every year,
横跨北美，
Across North America,
夏天温暖大地
summer warms the land.
加利福尼亚的山谷因生长而绚丽夺目
California's valleys are iridescent with growth.
海滩熙熙攘攘
Its beaches bustle.
内陆沙漠沙沙作响
Inland,its deserts sizzle.
在索诺兰沙漠滚滚的沙滩上，
In the rolling sands of the Sonoran Desert,
万里无云的天空下一点也不轻松
there's no relief under the cloudless skies.
响尾蛇在夏天必须改变她的行为
The sidewinder snake must change her behaviour in summer.
为了避免起泡的热量，
To avoid the blistering heat,
她限制了寻找猎物的时间，
she limits her time searching for prey,
只在清晨和黄昏时冒险外出
venturing out only in the early morning and dusk.
避开热沙，
Shunning the hot sand,
她一次只能接触两个身体部位
she restricts her contact to two body parts at a time.
特殊的运动方式
The peculiar mode of locomotion
使她成为沙滩上最快的响尾蛇
helps make her the fastest rattlesnake on sand.
在她打猎时留下一个J形的签名
Leaving a J-shaped signature as she hunts.
像山一样的沙丘成了西西菲亚人的任务
Dunes like mountains become a Sisyphean task.
坚持是这条饥饿的蛇唯一的选择
Persistence is the only option for this hungry snake.
但由于水分太少，无法散发气味，
But with little moisture to carry scent,
嗅出猎物很难
sniffing out prey is hard.
在她头的侧面使用特殊的温度计，
Using special temperature pits on the side of her head,
她扫描环境寻找生命的热量信♥号♥♥
she scans the environment for life's heat signal.
能分辨出细微差别，是热沙粒
Able to pick out the slightest variation between the hot sand
还是一顿热腾腾的午餐
and a hot lunch.
壁虎是冷血动物，
A gecko is cold-blooded,
使蛇的热传感器几乎看不见它
making it virtually invisible to the snake's thermal sensors.
但这只有在它静止不动的情况下才有效
But that only works if it stands still.
一个错误的动作，游戏就结束了
One false movement,and it's game over.
幸运的是，响尾蛇可以在没有食物的情况下存活整整一个月
Fortunately,the sidewinder can survive an entire month without food.
有足够的时间吃饭
Enough time to catch a meal.
沙漠几乎覆盖了地球表面的四分之一
Deserts cover almost one quarter of the Earth's surface.
但并非所有的沙漠都是灼热的沙丘
But not all deserts are scorching sand dunes.