The largest river on Earth is actually in the sky - Iseult Gillespie

1,045,034 views ・ 2023-12-12

TED-Ed


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翻译人员: Jing Quan 校对人员: Tianyun Liu
00:07
The largest rainforest in the world, the Amazon,
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世界上最大的热带雨林,亚马逊,
00:10
exists between two rivers— but not in the way you might think.
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介于两条河流之间, 但并非你想的那种方式。
00:13
At ground level, the Amazon River and its tributaries weave their path.
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在地面上,亚马逊河与其支流弯绕前行。
00:17
But above the canopy, bigger waterways are on the move.
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但是在树冠上方,更大的水道在流淌。
00:21
These flying rivers are almost invisible, but are essential to life on Earth.
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这些“飞河”近乎无形, 但对地球上的生命至关重要。
00:26
As rain seeps into the soil,
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当雨水渗入土壤时,
00:27
trees draw water back up through their roots
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树木会从根部吸收水分,
00:30
and pump it through their trunks for nourishment.
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然后通过树干作为补给。
00:32
The leaves and stems transpire, or release,
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叶子和茎以蒸气的方式排出,或释放,
00:35
excess water in the form of vapor.
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多余的水分。
00:38
In the Amazon,
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在亚马逊,
00:39
a fully grown tree transpires between 200 and 1,000 liters of water a day.
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一棵完全成型的树每天会蒸发 200 到 1,000 升的水。
00:45
This collective release creates a startling phenomenon:
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这种集体释放导致一种奇妙的现象:
00:48
huge jets of rapid, humid air that constantly flow above the canopy.
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潮湿的气流不断经过树冠上方。
00:53
Dubbed “flying rivers” by a Brazilian climatologist,
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被巴西气候学家称之为“飞河”。
00:56
these aerial waterways carry about 20 billion tons of water
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这些空中水道每日输送 大约 200 亿吨水分。
01:00
through the air per day.
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01:01
This is more than the Amazon River’s daily output into the ocean.
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这比亚马逊河每天流入海洋的水量还多。
01:05
Along the equator, the trade winds blow from east to west.
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在赤道沿线,信风从东向西吹来。
01:09
Caught in these winds, flying rivers flow in the same direction
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被信风裹挟,“飞河”朝同样的方向流去,
01:12
before encountering the Andes.
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最终遇到安第斯山脉。
01:14
The mountains act like a giant barrier,
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它像一道巨大的屏障,
01:16
causing the winds and rivers to redirect southwards.
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导致风与河流向南移动。
01:20
When flying rivers meet the masses of cold air,
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当“飞河”遇上大量的冷空气时,
01:22
they grow heavier and release torrents of water.
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它们的重量会增加并变为滂沱大雨。
01:25
In this way, they bring rain, cooler temperatures,
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这样一来,它们给南美大部分地区带来了
01:28
and humidity to much of South America.
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雨水,较低的温度,和湿度。
01:31
But these waterways are under threat.
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但是这些水道正受到威胁。
01:33
Clearing the Amazon for agriculture and industry
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为农业和生产开发的亚马逊雨林
01:36
is already causing flying rivers to dry up,
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已经导致“飞河”干涸,
01:38
leading to drought and hotter temperatures across South America.
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引发南美洲的干旱和气温上升。
01:42
If this pattern continues,
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如果这种趋势持续下去,
01:44
swaths of the continent may be reduced to desert in a matter of decades.
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南美的大部分地域也许会在 几十年内变成沙漠。
01:49
In response, a radical movement is working intensely to keep the rainforest—
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作为回应, 一个激进的运动正紧密行动,
全力以赴地维护雨林和“飞河”地生存。
01:53
and the flying rivers— alive.
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01:55
The northwest of the Peruvian Amazon is the territory of the Wampís Nation,
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秘鲁亚马逊河的西北边 是瓦皮斯民族的领土,
02:00
a community of over 15,000 people
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超过 15,000 人的当地居民
02:02
who manage over 130,000 square kilometers of land.
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管理超过 13 万平方公里的土地。
02:06
These Indigenous people have lived in the rainforest for thousands of years,
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这些原住民在热带雨林中生活了数千年,
02:10
practicing sustainable hunting, fishing, and agriculture.
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从事可持续的狩猎、捕鱼和农业。
02:14
For the Wampís,
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对瓦皮斯人来说,
02:15
protecting the rainforest has long meant fighting invaders.
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保护雨林长期以来 就意味着与入侵者作战。
02:18
Between the 15th and 17th centuries,
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在 15 至 17 世纪之间,
02:20
Wampís people resisted and expelled the Incas
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瓦皮斯人抵抗并驱逐了印加人,
02:23
and later the Spanish colonists who exploited the rainforest.
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后来又驱逐了开采雨林的西班牙殖民者。
02:26
Today, the Wampís Nation are still battling extractive industries—
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如今,瓦皮斯民族仍在与采掘业
02:30
and the policies that sanction them.
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以及制裁采掘业的政策作斗争。
02:33
For instance, since the 1960s,
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例如,自 1960 年代以来,
02:35
the Peruvian government has been licensing the Wampís’ territory
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秘鲁政府一直在向公司许可瓦皮斯的领土
02:39
to corporations for gold mining and oil extraction.
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进行金矿挖掘和石油开采。
02:42
These activities poison the rivers, clear thousands of trees,
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这些活动污染了水资源, 杀死了大量树木,
02:46
and threaten the Wampís way of life.
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并威胁着瓦皮斯人的生活方式。
02:48
In 2015, after years of protests and negotiations,
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2015 年,经过多年的抗议和谈判,
02:52
the community formed the Autonomous Territorial Government
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该社区成立了瓦皮斯民族自治区政府。
02:55
of the Wampís Nation.
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02:57
While the Wampís people remain Peruvian citizens,
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尽管瓦皮斯人仍然是秘鲁公民
03:00
they seek recognition as a government
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但他们致力于被认可是
03:01
responsible for their own lands, forests, and internal affairs.
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负责自己的土地、森林和内政的政府。
03:05
In its policies, the Wampís Nation prioritizes collective land ownership,
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在政策中,瓦皮斯将集体土地所有权、
03:10
cultural preservation, and conservation of animals, plants,
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文化保护以及保护雨林的动植物
03:13
and natural cycles that protect the rainforest.
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和自然循环的保护列为优先事项。
03:17
This is the foundation of their philosophy of Tarimat Pujut,
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这是他们 Tarimat Pujut(瓦皮斯语“美好生活”) 哲学的基础,
03:20
or living in harmony with nature
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即与自然和谐相处
03:22
to ensure food, friendships, and quality of life.
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以确保食物、友谊和生活质量。
03:25
The high, humid forest of the Wampís Nation
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瓦皮斯民族高而潮湿的森林
03:28
is crucial to the flying river cycle,
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对“飞河”循环至关重要。
03:30
transpiring over 34 million liters of water a day
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每天蒸腾超过 3,400 万升的水,
03:33
that flow to Peru, Ecuador, and Colombia.
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流向秘鲁、厄瓜多尔和哥伦比亚。
03:36
To track this output, Wampís scientists measure rainfall, monitor the wind,
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为了追踪这一输出,
瓦皮斯科学家测量降雨量、监测风
03:41
and weigh water levels in leaves and soil.
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并称量树叶和土壤中的水含量。
03:44
One of their climate goals is to defend this and other natural systems,
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他们的气候目标之一是保护 这个系统和其他自然系统,
03:48
including native soil that acts as a carbon sink
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包括充当碳汇的原生土壤
03:51
and the forest itself as a fire barrier.
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和充当防火屏障的森林本身。
03:53
The Wampís Nation constantly battles corporations that threaten these systems.
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瓦皮斯民族不断与 威胁这些系统的公司作战。
03:58
Between 2016 and 2018,
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2016 年至 2018 年间,
04:01
the community fought illegal gold mining along the Santiago River.
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该社区打击了圣地亚哥河沿岸的非法金矿开采。
04:04
They organized protests, uncovered mercury pollution,
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他们组织了抗议活动,发现了汞污染,
04:08
guarded the area, and attacked illegal machinery for months,
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守卫了该地区,
并袭击了数月的非法机器,
04:11
eventually expelling the miners.
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最终驱逐了矿工。
04:13
And in 2017, the Wampís Nation successfully petitioned a court
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和 2017 年, 瓦皮斯民族成功向法院请愿,
04:17
to bar a private oil company from their land.
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要求禁止一家私营石油公司进入其土地。
04:21
While these are significant victories,
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尽管这些都是重大胜利,
04:23
the Wampís Nation and other Indigenous groups need more recognition and support.
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但瓦皮斯民族和其他土著 群体需要更多的认可和支持。
04:27
Indigenous people and local communities live in and manage
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土著人民和当地社区生活和管理着
04:31
more than a quarter of the world’s land,
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世界四分之一以上的土地,
04:33
but only have legal ownership to a small percentage of it.
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但对其中一小部分拥有合法所有权。
04:36
And less than 1% of international climate and forest funds
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而且只有不到 1% 的国际气候和森林基金
04:39
go to their crucial conservation efforts.
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用于其关键的保护工作,
04:42
This is despite the fact that forests managed by Indigenous people
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尽管原住民管理的森林存活率更高。
04:46
have better survival rates.
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04:48
The Amazon is often described with language evocative of a giant organism—
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亚马逊雨林常被形容为一个巨大的有机体——
04:52
one that grows, dies, breathes in carbon dioxide and exhales oxygen.
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一个生长、死亡、 吸入二氧化碳、呼出氧气的生命体。
04:57
The processes that sustain it weave together in a complex
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维持其存在的各种过程交织在一起,
05:01
and often invisible web of water, air, soil, and human activity—
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形成了一个复杂而往往难以察觉的 水、空气、土壤和人类活动的网络——
05:06
both destructive and protective.
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既有破坏性又有保护作用。
05:08
We are far from understanding it in its entirety,
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我们还远未完全理解它的全貌,
05:12
but some are closer than others.
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但有些人比其他人更接近了解。
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