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Iceland...
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Built by fire...
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Sculpted by ice...
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Massive glaciers
cut through mountains.
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Melting ice
feeds thundering waterfalls.
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The power there
is just unbelievable.
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If you touch
the rocks around it,
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you can feel them trembling.
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On the world's largest
volcanic island,
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a titanic battle rages
between fire and ice.
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Its aftermath can be ferocious.
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They're flash floods
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and they can cause
a lot of damage
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wherever they go.
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They basically ruin
everything in their path.
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Vast stretches
of this cold-blooded wilderness
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appear gripped
by a never-ending Ice Age.
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But as the Earth warms
and glaciers melt,
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what will become of Iceland?
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(♪♪♪)
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(♪♪♪)
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(♪♪♪)
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(♪♪♪)
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(♪♪♪)
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In the southeast of Iceland
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at the foot
of a colossal glacier,
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an iceberg drifts serenely...
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...on a remote glacial lake.
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It is the size
of a two-story house.
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An echo from a long time ago
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when ice blanketed
much of the world.
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This dreamlike lagoon,
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awash with the wreckage of ice
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that has crumbled
from the glacier,
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is a sign
that Iceland is changing.
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(♪♪♪)
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15 years ago,
there was no lake here.
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Just a sheet of ice.
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This glacier is shrinking.
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It used to creep forward.
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No longer.
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It's losing more ice
than it gains from snowfall.
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But as it recedes,
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a lagoon left in its wake
is growing.
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The glacier is retreating.
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And the weight of the glacier
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means that the ice is actually
going into the ground,
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means that
when the glacier retreats,
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it leaves a hole in the ground.
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But the water flowing
from the glacier
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fills up the hole
and creates this lagoon.
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That particular lagoon
is interesting to watch
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because we can see so clearly
from one year to another
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that it is getting bigger.
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It's nature being created.
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We often say that Iceland
is still under construction
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and that's a good example
of that.
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The lagoon is an omen
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of a greater glacial collapse
to come.
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Its very existence
points to a potential disaster.
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Not just for Iceland,
but for our entire planet.
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(Waves crashing)
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Iceland lies in the middle
of the North Atlantic Ocean,
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about 200 miles
east of Greenland
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on the edge
of the Arctic Circle.
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(♪♪♪)
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Just 300 miles wide,
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it is roughly the size
of Kentucky.
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This lone and rugged island
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is a place
of extreme natural beauty.
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It is also one of the most
volcanic places on Earth.
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(Volcano erupting)
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Iceland's 30 active volcanoes
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generate 1/3rd
of the world's land-based lava.
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It is an island on fire.
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On average, Iceland experiences
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a major volcanic eruption
every 5 years.
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Lava has scraped bare
great belts of the interior
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creating cruel landscapes.
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Just 1/5th of this hostile,
alien land
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is inhabited by humans.
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200 earthquakes
shake the island each year.
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All over Iceland,
steam hisses...
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(Water erupts)
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...water erupts...
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...and lava spews
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from the mantle,
deep beneath the Earth's crust.
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In 2010, a volcanic eruption
at Eyjafjallajokull
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brought global air travel
to a standstill.
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The wrath
of Iceland's volcanoes
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has been felt far beyond
these shores.
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But there is one force
powerful enough
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to challenge
Iceland's fiery heart.
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Ice.
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About 1.5 million years ago,
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a massive ice sheet
descended from the north
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and smothered the island.
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Whole of Iceland
was covered with ice
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and the big icecaps,
Greenland and Antarctica,
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were quite a bit bigger
than they are at present.
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And that means
that the sea-level
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was about 100, 110 meters lower
than it is now
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because all the water
was stored in the ice.
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1/3rd of our planet lay
trapped under a rigid
blanket of ice.
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Then, about 12,000 years ago,
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the ice sheet loosened its grip
and began its retreat.
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Today, 11% of Iceland
remains covered by glaciers.
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Great rivers
of slow-moving ice.
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Spread out, they would cloak
the entire island
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in more than 100 feet of ice.
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Iceland's glaciers
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hold more than 800 cubic miles
of water,
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enough to fill
Michigan's Lake Huron.
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Deep within the realm
of a steep mountain range
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lies a frozen giant.
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Vatnajokul,
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the largest glacier in Iceland
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and the greatest glacial mass
in all of Europe.
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With a surface area of more than
3,000 square miles,
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it covers
most of southern Iceland
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and would entomb
the city of Tokyo in ice
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more than 1/3rd of a mile deep.
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So much water is locked
inside the glacier,
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it would take Iceland's
most powerful river
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more than 200 years
to carry it out to sea.
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The glacier is so immense,
it generates its own weather.
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Cold winds blow off the ice-cap,
chilling the valleys below.
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Vatnajokul
is constantly transforming.
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As it pushes
through the valley,
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it melts in the bright daylight.
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Then freezes,
during frigid Arctic nights.
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Crevasses,
cut open by friction
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as the ice
slumps down the mountain,
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can plunge more than 100 feet
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deep into the glacier's
icy heart.
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For adventure-seekers,
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the ice can be thrilling
but treacherous.
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When you hike
on the glaciers,
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you have to know
what you're doing.
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If you don't know
what you're doing,
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sometimes these crevasses
can be very dangerous.
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Sometimes they're snow-covered
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and you can't even see
where they are.
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So by all means,
people should always
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either have the experience
or have a guide with them
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when they do
something like that.
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Farther up the glacier,
crevasses are larger
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making higher reaches
impassable
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and hiking
even more harrowing.
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In 1953,
two British science students
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set out on a research expedition
on Vatnajokul.
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They were never seen again.
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It's believed the two fell
into a deep and hidden crevasse.
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In 2006,
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mountaineering equipment
belonging to the two students
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was discovered on the ice.
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At its thickest point,
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the ice is more than 2/3rds
of a mile deep.
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Entombed under these icy folds
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are mountains,
valleys and plateaus.
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The glacier also conceals
volcanoes.
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60% of Iceland's
active volcano systems
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lie under its glaciers.
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And that can produce
some dramatic results.
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(Volcano erupting)
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Grímsvotn...
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It has the highest eruption rate
of any volcano in Iceland.
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In 2011,
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it unleashed its fury
for the fourth time in 14 years.
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Torrents of molten rock
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surged through
shattered ice sheets,
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hurling a billowing cloud
of steam and ash
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12 miles into the sky,
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and plunging parts of the island
into near darkness.
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It is believed to be the most
violent eruption in Iceland
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since the 1960s.
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Far more powerful
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than the 2010 eruption
of Eyjafjallajokull
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that brought global air travel
to its knees.
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The two forces at play,
fire and ice,
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when mixed,
are a power to be reckoned with.
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You have these,
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the super-cold glacier
and the super-warm lava,
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and when the eruptions
take place under the glaciers,
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first of all,
the heat from the eruption
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starts melting the glacier
from underneath.
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And in some cases,
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the eruptions are big enough
and last for long enough
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to melt their way
all the way through the ice.
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And then we have
this magnificent display of fire
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just coming out of the ice.
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They're kind of battling
each other.
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In the explosive showdown
between lava and ice,
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ice is a forbidding force.
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But it is no match
for Iceland's fiery volcanoes
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which can wreak havoc
in other, unexpected, ways.
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Flooding,
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triggered by the eruption
of a volcano
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beneath a glacier.
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00:12:55,842 --> 00:13:00,113
The 2010 eruption
at Eyjafjallajokull
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melted the glacier
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00:13:03,082 --> 00:13:06,386
and sent
2 billion cubic feet of water
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flooding down the mountain,
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nearly the volume of water
that goes over Niagara Falls
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in 6 hours.
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00:13:16,529 --> 00:13:17,463
The flash floods,
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which are known in Iceland
as "jokulhlaup"
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or the "glacial floods".
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00:13:22,301 --> 00:13:24,804
And they will go down
and onto the lowlands
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00:13:24,804 --> 00:13:27,607
and can cause a lot of damage
wherever they go.
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They basically ruin
everything in their path.
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Iceland's glacial floods
are enormously destructive.
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Raging torrents of water
wash away roads.
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00:13:47,427 --> 00:13:50,329
At the foot
of Vatnajokul glacier,
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lies the twisted wreckage
of a steel bridge
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wiped out by glacial flooding.
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(♪♪♪)
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Glacial floods carry
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00:14:07,513 --> 00:14:11,484
millions of tons
of volcanic rock and ash
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00:14:11,484 --> 00:14:14,454
to Iceland's south shore,
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00:14:14,454 --> 00:14:16,789
reshaping the coastline
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00:14:16,789 --> 00:14:20,059
and creating stretches
of basalt beach
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as black as gunmetal.
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It's because it's all
produced by breaking down basalt
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which is a black rock.
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00:14:30,069 --> 00:14:31,404
And most of the rock,
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the majority of rocks
in Iceland,
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are black in color
because most of it is basalt.
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So we have this dark color.
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00:14:40,279 --> 00:14:42,615
So it-- I remember one time
going to Hawaii
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and everyone talked about
the black sand beach.
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00:14:44,317 --> 00:14:45,585
"You need to go and see
the black sand beach."
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00:14:45,585 --> 00:14:47,120
And I said, "Why?
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00:14:47,120 --> 00:14:48,154
I've seen nothing
but black sand beaches
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00:14:48,154 --> 00:14:49,655
in my life.
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00:14:49,655 --> 00:14:51,657
I'm from a place
where all the rocks are dark."
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00:14:58,164 --> 00:15:00,266
At Sandvik Beach,
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towering cliffs are home
to thousands of sea birds,
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including the puffin.
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(Birds squawking)
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00:15:09,275 --> 00:15:12,245
More than half the world's
Atlantic puffins
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breed on Iceland's
rocky cliff tops.
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(Birds squawking in distance)
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Although the north coast
of the island
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00:15:24,390 --> 00:15:27,093
touches the Arctic Circle,
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00:15:27,093 --> 00:15:30,163
its coastal waters
remain free of sea ice.
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00:15:32,198 --> 00:15:36,702
The Atlantic Gulf Stream,
a system of thermal currents
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00:15:36,702 --> 00:15:39,739
warms this passage
of the North Atlantic.
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00:15:39,739 --> 00:15:46,078
(♪♪♪)
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But with warmer water
comes rain.
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This stretch of coastline
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is one of the wettest
in Iceland,
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00:15:55,087 --> 00:15:58,591
with average annual rainfall
of more than 90 inches.
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00:16:01,594 --> 00:16:04,764
Isolated
near the top of the world,
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00:16:04,764 --> 00:16:08,467
Iceland is ravaged by storms
in every direction.
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00:16:10,369 --> 00:16:13,339
Fierce winds
and rolling Atlantic waves
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batter its shores.
258
00:16:17,243 --> 00:16:21,214
Through the centuries,
scores of Icelandic mariners
259
00:16:21,214 --> 00:16:24,283
have drowned in its wild,
stormy waters.
260
00:16:27,286 --> 00:16:30,756
Even today, there is real danger
for the Icelanders
261
00:16:30,756 --> 00:16:33,993
who harvest
these cold, dark seas.
262
00:16:36,062 --> 00:16:37,129
The connection between
263
00:16:37,129 --> 00:16:39,432
the people living
in these villages and the ocean
264
00:16:39,432 --> 00:16:41,367
is very, very strong.
265
00:16:41,367 --> 00:16:43,769
It is their livelihood.
266
00:16:43,769 --> 00:16:46,239
And sometimes in some areas,
267
00:16:46,239 --> 00:16:48,641
especially close
to the south coast,
268
00:16:48,641 --> 00:16:51,377
where we have the rough surf
of the Atlantic
269
00:16:51,377 --> 00:16:53,579
hammering the coast,
270
00:16:53,579 --> 00:16:58,084
going out in the boats
to catch the fish
271
00:16:58,084 --> 00:17:00,553
has always been
a big challenge.
272
00:17:00,553 --> 00:17:02,488
They have to go
through the surf sometimes.
273
00:17:02,488 --> 00:17:05,191
And even today in the fish--
big fishing boats
274
00:17:05,191 --> 00:17:07,059
and with all the technology,
275
00:17:07,059 --> 00:17:10,329
this is often a very dangerous
and difficult thing to do.
276
00:17:10,329 --> 00:17:11,530
So these are tough people
277
00:17:11,530 --> 00:17:14,200
and they have learned
to survive
278
00:17:14,200 --> 00:17:16,702
with this giant,
the Atlantic Ocean.
279
00:17:23,542 --> 00:17:26,545
At the end
of the black sand beach,
280
00:17:26,545 --> 00:17:28,814
jagged blades of basalt
281
00:17:28,814 --> 00:17:31,684
rise more than 200 feet
into the air.
282
00:17:33,552 --> 00:17:37,490
Once part of a greater
volcanic cliff line,
283
00:17:37,490 --> 00:17:39,825
these ancient sea stacks
284
00:17:39,825 --> 00:17:43,696
have been ground down over time
by wind
285
00:17:43,696 --> 00:17:45,531
and the rages of the sea.
286
00:17:49,535 --> 00:17:51,203
Farther inland,
287
00:17:51,203 --> 00:17:54,774
Iceland's mighty ice fields
are also shrinking.
288
00:18:00,479 --> 00:18:02,548
Although
the majority of its glaciers
289
00:18:02,548 --> 00:18:06,152
lie atop active volcano systems,
290
00:18:06,152 --> 00:18:09,722
less than 5%
of the melting of its ice caps
291
00:18:09,722 --> 00:18:12,458
is attributed
to volcanic heat.
292
00:18:14,026 --> 00:18:17,697
A far more destructive force
threatens Iceland's glaciers.
293
00:18:19,432 --> 00:18:21,434
Rising global temperatures.
294
00:18:25,604 --> 00:18:29,675
Over the last 100 years,
the planet has warmed.
295
00:18:32,611 --> 00:18:35,314
The upper reaches
of the northern hemisphere
296
00:18:35,314 --> 00:18:39,385
are warming twice as fast
as regions farther south.
297
00:18:39,385 --> 00:18:43,622
(♪♪♪)
298
00:18:43,622 --> 00:18:46,525
In a land of ice and snow,
299
00:18:46,525 --> 00:18:49,762
the effects of climate change
are unmistakable.
300
00:18:52,431 --> 00:18:54,567
The glaciers are melting.
301
00:18:56,802 --> 00:18:59,805
Of course, the glaciers
are disappearing right now.
302
00:18:59,805 --> 00:19:04,643
I've been monitoring glaciers
for 30 years
303
00:19:04,643 --> 00:19:08,614
and it's the temperature,
mean temperature,
304
00:19:08,614 --> 00:19:10,583
particularly,
the summer temperature,
305
00:19:10,583 --> 00:19:12,451
which is causing the changes.
306
00:19:12,451 --> 00:19:16,088
And the summer temperature,
and temperature in general,
307
00:19:16,088 --> 00:19:19,225
has been rising
during this last century
308
00:19:19,225 --> 00:19:21,994
very consistently.
309
00:19:24,764 --> 00:19:28,734
In Iceland,
glacial melt is nothing new.
310
00:19:28,734 --> 00:19:32,104
Each winter,
snow falls on the glacier
311
00:19:32,104 --> 00:19:35,408
and gradually compresses
into ice.
312
00:19:35,408 --> 00:19:36,575
Each summer,
313
00:19:36,575 --> 00:19:39,512
melt water
pours from the icecaps,
314
00:19:39,512 --> 00:19:42,148
gathers in streams
and rivers,
315
00:19:42,148 --> 00:19:44,984
and cascades
into valleys below.
316
00:19:53,125 --> 00:19:55,694
This cycle of freeze and thaw
317
00:19:55,694 --> 00:19:58,297
has endured
for thousands of years.
318
00:20:00,199 --> 00:20:02,401
But in the last century,
319
00:20:02,401 --> 00:20:05,704
glacial melt
has far exceeded snowfall.
320
00:20:07,073 --> 00:20:09,475
The glaciers are vanishing...
321
00:20:09,475 --> 00:20:11,210
...at an alarming rate.
322
00:20:20,086 --> 00:20:23,122
5% of Iceland's ice caps
323
00:20:23,122 --> 00:20:25,324
have melted
in the last 40 years.
324
00:20:27,093 --> 00:20:31,263
Each year,
11 billion tons of ice
325
00:20:31,263 --> 00:20:32,765
vanish from the island.
326
00:20:36,836 --> 00:20:39,205
The last time
Iceland experienced
327
00:20:39,205 --> 00:20:42,608
an accelerated melt
on this scale
328
00:20:42,608 --> 00:20:45,678
is when it emerged
from the last Ice Age
329
00:20:45,678 --> 00:20:48,514
more than 12,000 years ago.
330
00:20:48,514 --> 00:20:54,620
(♪♪♪)
331
00:20:54,620 --> 00:21:00,292
Iceland's largest icecap
feeds dozens of outlet glaciers,
332
00:21:00,292 --> 00:21:02,394
essentially tongues
333
00:21:02,394 --> 00:21:05,731
that slide away
from the larger mass of ice
334
00:21:05,731 --> 00:21:07,333
and into deep valleys.
335
00:21:10,169 --> 00:21:12,471
The glaciers are estimated
to be melting
336
00:21:12,471 --> 00:21:15,074
at a rate of 3 feet per year.
337
00:21:16,809 --> 00:21:19,111
Many of its outlet glaciers
338
00:21:19,111 --> 00:21:22,548
are melting
at an even faster pace.
339
00:21:22,548 --> 00:21:25,518
So this glacier is
actually moving quite fast.
340
00:21:25,518 --> 00:21:27,253
During the last 100 years,
341
00:21:27,253 --> 00:21:29,088
it's been retreating
very rapidly.
342
00:21:29,088 --> 00:21:31,290
So now it's further back
than it has ever been
343
00:21:31,290 --> 00:21:34,226
in the last 120 years or so.
344
00:21:34,226 --> 00:21:35,327
Since the early '90s,
345
00:21:35,327 --> 00:21:36,529
all the glaciers
have been retreating
346
00:21:36,529 --> 00:21:38,164
and losing mass quite rapidly.
347
00:21:45,638 --> 00:21:47,606
Svinafellsjokull,
348
00:21:47,606 --> 00:21:51,343
one of the largest
outlet glaciers at Vatnajokull,
349
00:21:51,343 --> 00:21:53,512
advances down the mountain
350
00:21:53,512 --> 00:21:56,515
between 80 to 100 feet
each year.
351
00:22:01,320 --> 00:22:04,823
But despite this immense
forward push of ice,
352
00:22:04,823 --> 00:22:07,393
summer melting
causes its leading edge
353
00:22:07,393 --> 00:22:10,296
to recede more than 130 feet.
354
00:22:13,832 --> 00:22:16,335
Great swaths of the valley,
355
00:22:16,335 --> 00:22:18,771
once enveloped by the glacier,
356
00:22:18,771 --> 00:22:21,173
now lie exposed
357
00:22:21,173 --> 00:22:24,109
as Vatnajokull retreats
up the mountain.
358
00:22:26,445 --> 00:22:30,249
It is a grim reminder
that the glacier is dying.
359
00:22:34,253 --> 00:22:36,488
At this glacial lagoon,
360
00:22:36,488 --> 00:22:39,592
huge chunks of ice
have broken off
361
00:22:39,592 --> 00:22:42,027
or calved from the glacier.
362
00:22:46,665 --> 00:22:50,636
Calving begins with a fracture
in the edge of the glacier
363
00:22:50,636 --> 00:22:56,175
caused by the erosion
from wind, water or melting ice.
364
00:22:56,175 --> 00:23:00,079
When the crack penetrates
the full depth of the glacier,
365
00:23:00,079 --> 00:23:03,782
the sheer weight of the ice
takes its toll
366
00:23:03,782 --> 00:23:08,320
and huge blocks break away
creating icebergs.
367
00:23:10,322 --> 00:23:12,825
Some are darkly striped,
368
00:23:12,825 --> 00:23:15,728
blackened by debris
from the valley floor.
369
00:23:15,728 --> 00:23:23,302
(♪♪♪)
370
00:23:23,302 --> 00:23:26,772
Calving is a natural process
in the life of a glacier.
371
00:23:28,340 --> 00:23:30,276
But across the Arctic,
372
00:23:30,276 --> 00:23:33,245
glaciers are calving
at an alarming rate.
373
00:23:35,581 --> 00:23:37,583
As temperatures rise
374
00:23:37,583 --> 00:23:40,519
and polar ice
weakens and melts,
375
00:23:40,519 --> 00:23:43,355
more and more ice
cleaves from the glacier.
376
00:23:46,292 --> 00:23:48,827
As the ice sheet breaks apart,
377
00:23:48,827 --> 00:23:52,298
lagoons swell
and flood the lowlands.
378
00:23:57,169 --> 00:23:59,772
The icebergs in the lagoon,
379
00:23:59,772 --> 00:24:02,675
ruins from a dwindling ice cap,
380
00:24:02,675 --> 00:24:05,477
provide a glimpse
into the future
381
00:24:05,477 --> 00:24:08,247
of all of Iceland's glaciers.
382
00:24:11,250 --> 00:24:14,086
We have done some modeling
for the Icelandic glaciers
383
00:24:14,086 --> 00:24:17,189
and taking some assumptions
384
00:24:17,189 --> 00:24:20,092
about how the temperature
is gonna increase in the future,
385
00:24:20,092 --> 00:24:22,528
we see actually quite
a bleak future for the glaciers.
386
00:24:22,528 --> 00:24:26,465
So most of them
will probably be gone
387
00:24:26,465 --> 00:24:28,701
in about 200, 250 years.
388
00:24:32,371 --> 00:24:35,074
The prospect
of a glacial collapse
389
00:24:35,074 --> 00:24:39,111
is a disturbing one
for the people of Iceland.
390
00:24:39,111 --> 00:24:42,214
Locked inside the ice caps
391
00:24:42,214 --> 00:24:45,250
is their largest reservoir
of fresh water.
392
00:24:48,721 --> 00:24:51,824
If all the glaciers
would disappear entirely,
393
00:24:51,824 --> 00:24:53,492
it would have
very negative effect
394
00:24:53,492 --> 00:24:56,095
on our water supply.
395
00:24:56,095 --> 00:25:00,466
And not only in form of the
drinking water that we need,
396
00:25:00,466 --> 00:25:02,368
both hot and cold water,
397
00:25:02,368 --> 00:25:03,369
but also the fact
398
00:25:03,369 --> 00:25:06,405
that 70% of the energy
that we have in Iceland
399
00:25:06,405 --> 00:25:08,707
is produced
in hydraulic power plants
400
00:25:08,707 --> 00:25:11,210
by damming the rivers.
401
00:25:11,210 --> 00:25:13,479
So they are
a very, very big part of--
402
00:25:13,479 --> 00:25:15,547
important part of our lives.
403
00:25:15,547 --> 00:25:25,524
(♪♪♪)
404
00:25:25,524 --> 00:25:28,227
The deterioration
of the ice sheets
405
00:25:28,227 --> 00:25:31,130
could have devastating
consequences,
406
00:25:31,130 --> 00:25:35,334
not just for Iceland,
but for the world beyond.
407
00:25:35,334 --> 00:25:41,473
(♪♪♪)
408
00:25:41,473 --> 00:25:42,841
In the global context,
409
00:25:42,841 --> 00:25:46,345
we can say
that when the glaciers melt,
410
00:25:46,345 --> 00:25:48,313
sea level is gonna rise.
411
00:25:48,313 --> 00:25:50,382
The glaciers in Iceland
412
00:25:50,382 --> 00:25:52,551
are not that big
in a global context.
413
00:25:52,551 --> 00:25:54,787
so if we take
all the glaciers in Iceland,
414
00:25:54,787 --> 00:25:56,755
melt them
and put it into the ocean,
415
00:25:56,755 --> 00:25:59,625
the sea level will rise
about 1 centimeter.
416
00:25:59,625 --> 00:26:01,493
So that's not a big influence.
417
00:26:01,493 --> 00:26:04,763
But we have greater neighbor,
Greenland ice sheet.
418
00:26:04,763 --> 00:26:08,267
And if we mentally
take that whole ice,
419
00:26:08,267 --> 00:26:10,702
and melt it
and put it into the ocean,
420
00:26:10,702 --> 00:26:13,138
the sea level would rise
7 meters.
421
00:26:16,775 --> 00:26:19,511
A sea-level-rise of 20 feet
422
00:26:19,511 --> 00:26:24,783
would drown more than
400,000 square miles of land,
423
00:26:24,783 --> 00:26:29,121
threaten the planet's
coastal nations and cities
424
00:26:29,121 --> 00:26:33,058
and put more than
100 million people at risk.
425
00:26:33,058 --> 00:26:39,331
(♪♪♪)
426
00:26:39,331 --> 00:26:42,334
But it's not just sea levels
that are climbing
427
00:26:42,334 --> 00:26:45,204
as a result of climate change.
428
00:26:45,204 --> 00:26:47,639
Iceland too is rising.
429
00:26:49,541 --> 00:26:52,744
As ice melts,
its load becomes lighter
430
00:26:52,744 --> 00:26:55,848
reducing pressure
on the land below
431
00:26:55,848 --> 00:26:58,517
and the ground rebounds.
432
00:26:58,517 --> 00:27:01,153
It's known
as "isostatic lift".
433
00:27:03,155 --> 00:27:04,490
In some areas,
434
00:27:04,490 --> 00:27:08,393
the island is rising
more than 1 inch per year.
435
00:27:08,393 --> 00:27:10,362
The speed of this rise
436
00:27:10,362 --> 00:27:12,698
is among the fastest
on the planet.
437
00:27:14,533 --> 00:27:18,370
And as the land rebounds,
volcanoes stir.
438
00:27:21,540 --> 00:27:24,710
Heavy weight
on top of a volcano,
439
00:27:24,710 --> 00:27:30,582
such as a massive sheet of ice
will suppress volcanic activity.
440
00:27:30,582 --> 00:27:34,253
As ice melts,
downward pressure is released
441
00:27:34,253 --> 00:27:37,756
allowing magma
to rise to the surface
442
00:27:37,756 --> 00:27:40,425
where it can trigger
volcanic eruptions.
443
00:27:45,264 --> 00:27:48,367
Geological evidence
from the last Ice Age
444
00:27:48,367 --> 00:27:51,470
suggests that volcanic eruptions
in Iceland
445
00:27:51,470 --> 00:27:55,374
increased 30-fold
after the glaciers retreated.
446
00:28:00,045 --> 00:28:03,048
Scientists estimate
a glacial collapse
447
00:28:03,048 --> 00:28:05,150
could lead
to a major eruption
448
00:28:05,150 --> 00:28:06,585
every 7 years.
449
00:28:08,020 --> 00:28:09,788
Eruptions on this scale
450
00:28:09,788 --> 00:28:12,324
can lead to something
even worse.
451
00:28:16,328 --> 00:28:18,630
In 1783,
452
00:28:18,630 --> 00:28:22,401
an eruption at Laki
in south-central Iceland
453
00:28:22,401 --> 00:28:25,437
sent a poisonous cloud
of sulfur dioxide
454
00:28:25,437 --> 00:28:26,705
into the atmosphere.
455
00:28:26,705 --> 00:28:35,447
(♪♪♪)
456
00:28:35,447 --> 00:28:39,484
The thick fog of fumes
plunged Iceland into famine,
457
00:28:39,484 --> 00:28:41,486
spread over Europe
458
00:28:41,486 --> 00:28:47,292
and possibly killed an estimated
two million people worldwide.
459
00:28:47,292 --> 00:28:50,629
It was one of the deadliest
volcanic eruptions
460
00:28:50,629 --> 00:28:52,564
in human history.
461
00:28:52,564 --> 00:28:58,637
(♪♪♪)
462
00:28:58,637 --> 00:29:01,540
As Iceland's glaciers
continue to melt
463
00:29:01,540 --> 00:29:05,510
atop some of the world's
deadliest volcanoes,
464
00:29:05,510 --> 00:29:08,180
the threat of eruptions
increases.
465
00:29:09,314 --> 00:29:11,583
Some geologists believe
466
00:29:11,583 --> 00:29:15,520
a massive natural disaster
similar to Laki
467
00:29:15,520 --> 00:29:17,322
could happen again.
468
00:29:18,657 --> 00:29:21,560
There will be another one
like that in the future, yes.
469
00:29:21,560 --> 00:29:24,029
Every now and then,
about 1,000 years apart,
470
00:29:24,029 --> 00:29:26,365
we get huge eruptions,
471
00:29:26,365 --> 00:29:30,669
which will even affect greatly
the modern society.
472
00:29:30,669 --> 00:29:33,438
We'll, probably,
have a much better way
473
00:29:33,438 --> 00:29:37,142
of defending ourselves
than people had then,
474
00:29:37,142 --> 00:29:40,479
when 10% of the people died
from the famine
475
00:29:40,479 --> 00:29:44,816
and the results of the haze.
476
00:29:44,816 --> 00:29:50,722
But there may very well be
volcanic eruptions
477
00:29:50,722 --> 00:29:55,160
that will affect
the whole society of Iceland
478
00:29:55,160 --> 00:29:58,563
in such a way that
it will hardly be habitable.
479
00:30:02,601 --> 00:30:04,703
The Laki lava field,
480
00:30:04,703 --> 00:30:08,707
which laid waste to more than
200 square miles,
481
00:30:08,707 --> 00:30:12,210
is a reminder of the horror
that befell Iceland.
482
00:30:14,112 --> 00:30:16,348
But where nature can destroy,
483
00:30:16,348 --> 00:30:18,650
it can also create beauty.
484
00:30:20,752 --> 00:30:22,254
On this night,
485
00:30:22,254 --> 00:30:25,123
the sky above the field
begins to bruise.
486
00:30:26,591 --> 00:30:31,430
And in the upper atmosphere,
a cosmic spectacle unfolds.
487
00:30:31,430 --> 00:30:33,498
Aurora Borealis.
488
00:30:33,498 --> 00:30:35,100
The Northern Lights.
489
00:30:37,669 --> 00:30:41,306
Electrically charged particles
of solar wind
490
00:30:41,306 --> 00:30:44,543
collide with
the Earth's magnetic field,
491
00:30:44,543 --> 00:30:46,211
creating one of nature's
492
00:30:46,211 --> 00:30:48,780
most elusive
and spectacular sights.
493
00:30:56,755 --> 00:31:00,759
Iceland may be built
from fire and volcanic rock
494
00:31:00,759 --> 00:31:03,261
but it takes its shape
from ice.
495
00:31:05,397 --> 00:31:07,566
As glaciers
advanced and retreated
496
00:31:07,566 --> 00:31:09,835
over thousands of years,
497
00:31:09,835 --> 00:31:12,838
they carved out deep fjords
498
00:31:12,838 --> 00:31:15,707
and sculpted
Iceland's furrowed coastline.
499
00:31:18,276 --> 00:31:20,712
Some glaciers are long gone.
500
00:31:25,751 --> 00:31:28,553
Others are still at work today
501
00:31:28,553 --> 00:31:30,789
dramatically transforming
the landscape.
502
00:31:34,259 --> 00:31:39,498
Vatnajokul bears down
on the valleys like a bulldozer.
503
00:31:39,498 --> 00:31:42,567
At the rate of 2 feet per day,
504
00:31:42,567 --> 00:31:45,370
it crushes
the land beneath it,
505
00:31:45,370 --> 00:31:50,208
eroding solid rock
like sandpaper over wood.
506
00:31:51,576 --> 00:31:54,279
Around Vatnajokul
you have these runoff glaciers
507
00:31:54,279 --> 00:31:56,248
that come flowing
down from the big ice sheet,
508
00:31:56,248 --> 00:31:57,649
carving the valleys,
509
00:31:57,649 --> 00:32:01,086
making the valleys deeper
and wider as they do that.
510
00:32:01,086 --> 00:32:04,055
So one of the things that
you can clearly see
511
00:32:04,055 --> 00:32:06,591
when you look at the glaciers
are the glacier moraines
512
00:32:06,591 --> 00:32:09,060
that are often
in front of them,
513
00:32:09,060 --> 00:32:11,229
which are the result
of the fact
514
00:32:11,229 --> 00:32:13,732
that the glacier
pushes forward,
515
00:32:13,732 --> 00:32:17,469
and it pushes gravel and dirt
in front of it,
516
00:32:17,469 --> 00:32:19,271
creating these mounds.
517
00:32:19,271 --> 00:32:20,839
And then
as the glacier retreats,
518
00:32:20,839 --> 00:32:23,642
it leaves these mounds
just sitting there
519
00:32:23,642 --> 00:32:27,579
like small hills--
sometimes very big hills.
520
00:32:27,579 --> 00:32:31,316
Piles of moraines
litter the landscape,
521
00:32:31,316 --> 00:32:35,320
evidence that the glaciers
are disappearing.
522
00:32:35,320 --> 00:32:38,790
Inside these rocky ridges
are clues
523
00:32:38,790 --> 00:32:40,792
to where the glaciers
have been.
524
00:32:42,194 --> 00:32:44,162
Rocks and minerals
525
00:32:44,162 --> 00:32:48,466
unique to a particular landscape
hundreds of miles away
526
00:32:48,466 --> 00:32:51,203
can be found in the moraine,
527
00:32:51,203 --> 00:32:54,639
proof that a glacier
flowed through that region.
528
00:32:58,543 --> 00:33:01,179
As the glaciers power forward,
529
00:33:01,179 --> 00:33:03,682
they scour and gouge
the bedrock
530
00:33:03,682 --> 00:33:07,686
with boulders
carried in their bellies,
531
00:33:07,686 --> 00:33:11,156
leaving scars in their wake
532
00:33:11,156 --> 00:33:15,260
only to be revealed
when the glaciers recede.
533
00:33:15,260 --> 00:33:18,496
These juggernauts of ice
are so powerful,
534
00:33:18,496 --> 00:33:20,565
they can destroy mountains.
535
00:33:24,202 --> 00:33:28,206
On the Snafellsnes Peninsula
in western Iceland,
536
00:33:28,206 --> 00:33:30,442
a free-standing mountain
537
00:33:30,442 --> 00:33:34,846
bears the scars of the glacier
that covered it,
538
00:33:34,846 --> 00:33:36,248
Kirkjufell.
539
00:33:38,850 --> 00:33:40,819
It is one of the most
distinct models
540
00:33:40,819 --> 00:33:43,188
of glacial erosion in Iceland.
541
00:33:46,091 --> 00:33:48,860
Kirkjufell's unusual
pyramid shape
542
00:33:48,860 --> 00:33:51,363
can be traced
to the last Ice Age.
543
00:33:53,565 --> 00:33:56,301
Glaciers on either side
of its peak,
544
00:33:56,301 --> 00:33:59,170
scraped slowly down
the mountain
545
00:33:59,170 --> 00:34:03,074
scooping out rock
and carrying it down its slopes.
546
00:34:07,312 --> 00:34:09,514
As the glacier flowed,
547
00:34:09,514 --> 00:34:12,484
shattered rocks,
caught underneath the ice,
548
00:34:12,484 --> 00:34:14,586
ground the mountainsides,
549
00:34:14,586 --> 00:34:16,721
carving out more rock.
550
00:34:19,157 --> 00:34:22,127
When the glaciers
melted and retreated,
551
00:34:22,127 --> 00:34:24,763
Kirkjufell was left
completely severed
552
00:34:24,763 --> 00:34:28,099
from the rest
of the mountain chain.
553
00:34:28,099 --> 00:34:30,735
Today, it stands alone.
554
00:34:30,735 --> 00:34:33,104
A mighty mountain,
555
00:34:33,104 --> 00:34:35,674
but no match
for the power of ice.
556
00:34:45,116 --> 00:34:49,287
Nowhere is the crushing strength
of ice more extensive
557
00:34:49,287 --> 00:34:52,490
than in Iceland's magnificent
glacial valleys.
558
00:34:52,490 --> 00:35:00,465
(♪♪♪)
559
00:35:00,465 --> 00:35:04,636
These canyons form
when glaciers push slowly
560
00:35:04,636 --> 00:35:08,373
through channels already cut
by flowing streams.
561
00:35:08,373 --> 00:35:14,713
(♪♪♪)
562
00:35:14,713 --> 00:35:16,548
Year after year,
563
00:35:16,548 --> 00:35:18,683
decade after decade,
564
00:35:18,683 --> 00:35:21,586
century after century,
565
00:35:21,586 --> 00:35:23,588
the glacier eats away
566
00:35:23,588 --> 00:35:27,058
at the sides
of the original valley
567
00:35:27,058 --> 00:35:29,461
transforming a narrow gully
568
00:35:29,461 --> 00:35:32,197
into a wide and mighty canyon.
569
00:35:34,632 --> 00:35:38,436
Entire mountainsides
are sheared away
570
00:35:38,436 --> 00:35:41,306
leaving behind
steep vertical cliffs.
571
00:35:46,077 --> 00:35:50,148
Melt-water from the glacier
now feeds the stream
572
00:35:50,148 --> 00:35:52,517
that flows
through this mighty valley.
573
00:35:57,155 --> 00:35:58,690
Clearly too small
574
00:35:58,690 --> 00:36:01,726
to have created
this majestic canyon,
575
00:36:01,726 --> 00:36:04,195
it's known as a misfit stream.
576
00:36:06,231 --> 00:36:10,135
It can take decades,
sometimes centuries,
577
00:36:10,135 --> 00:36:12,704
for Iceland's water
to complete its cycle
578
00:36:12,704 --> 00:36:14,506
and return to the sea.
579
00:36:15,807 --> 00:36:19,444
Rivers and streams
flow with meltwater from snow
580
00:36:19,444 --> 00:36:21,713
that fell hundreds
of years ago.
581
00:36:23,181 --> 00:36:25,250
Meltwater from glaciers
582
00:36:25,250 --> 00:36:30,221
seeps into the ground
and through porous lava rock.
583
00:36:30,221 --> 00:36:33,191
You could almost say
that the lava is like a sponge.
584
00:36:33,191 --> 00:36:34,592
It takes in a lot of water
585
00:36:34,592 --> 00:36:38,463
and then it slowly lets it go
586
00:36:38,463 --> 00:36:40,331
as the sponge fills up.
587
00:36:40,331 --> 00:36:43,735
It takes maybe 30 years
for a drop of water
588
00:36:43,735 --> 00:36:47,238
to go from the point it melts,
seeps into the ground,
589
00:36:47,238 --> 00:36:49,374
until it flows out
somewhere else.
590
00:36:49,374 --> 00:36:51,042
So it's a very slow process.
591
00:36:55,113 --> 00:36:57,782
These humble streams
merge together
592
00:36:57,782 --> 00:37:00,251
to form powerful rivers,
593
00:37:00,251 --> 00:37:03,421
which in turn form
another erosive force
594
00:37:03,421 --> 00:37:05,757
that has shaped Iceland.
595
00:37:05,757 --> 00:37:08,793
(Water gushing)
596
00:37:08,793 --> 00:37:10,361
Waterfalls.
597
00:37:21,106 --> 00:37:24,509
Iceland's climate and topography
combine to generate
598
00:37:24,509 --> 00:37:28,613
some of the most stunning
waterfalls in the world.
599
00:37:28,613 --> 00:37:32,417
On some parts of the island,
waterfalls outnumber people.
600
00:37:34,619 --> 00:37:37,155
In this North-Atlantic climate,
601
00:37:37,155 --> 00:37:40,058
snow and rain
frequently drench the land.
602
00:37:44,362 --> 00:37:46,231
High in the mountains,
603
00:37:46,231 --> 00:37:50,368
melting glaciers
feed frigid rivers
604
00:37:50,368 --> 00:37:53,238
already swollen
from precipitation.
605
00:37:55,306 --> 00:37:57,542
Over dozens of miles,
606
00:37:57,542 --> 00:38:01,079
these glacial rivers gather
pace and volume.
607
00:38:03,181 --> 00:38:06,518
Finally,
they roar over rocky cliffs.
608
00:38:06,518 --> 00:38:18,796
(♪♪♪)
609
00:38:18,796 --> 00:38:20,665
At Selfoss,
610
00:38:20,665 --> 00:38:24,169
an unending flow
of glacial melt water
611
00:38:24,169 --> 00:38:28,206
cascades over the ridge,
battering the rocks below.
612
00:38:30,742 --> 00:38:32,644
More than 30 feet high,
613
00:38:32,644 --> 00:38:35,313
Selfoss generates
immense power.
614
00:38:37,282 --> 00:38:38,750
But it is a trickle
615
00:38:38,750 --> 00:38:41,186
compared to what lies
downstream.
616
00:38:45,423 --> 00:38:46,558
Dettifoss.
617
00:38:49,294 --> 00:38:53,198
150 feet high.
618
00:38:53,198 --> 00:38:54,599
300 feet wide.
619
00:38:56,534 --> 00:39:01,472
It is the largest waterfall
in Europe,
620
00:39:01,472 --> 00:39:04,642
powerful enough
to fracture solid rock.
621
00:39:04,642 --> 00:39:10,448
(♪♪♪)
622
00:39:10,448 --> 00:39:13,484
Early Icelanders
called Dettifoss
623
00:39:13,484 --> 00:39:15,687
"the king of all waterfalls".
624
00:39:18,556 --> 00:39:20,358
On an average day,
625
00:39:20,358 --> 00:39:23,595
enough water cascades
over its crest line
626
00:39:23,595 --> 00:39:26,364
to fill
an Olympic-sized swimming pool
627
00:39:26,364 --> 00:39:29,534
every 5 seconds.
628
00:39:29,534 --> 00:39:32,670
In warm weather,
which boosts meltwater,
629
00:39:32,670 --> 00:39:34,706
or on rainy days,
630
00:39:34,706 --> 00:39:38,309
even more water is unleashed.
631
00:39:38,309 --> 00:39:41,446
Dettifoss
is a magnificent display
632
00:39:41,446 --> 00:39:43,281
of the power of water.
633
00:39:43,281 --> 00:39:45,450
It's a breathtaking thing
to see.
634
00:39:45,450 --> 00:39:46,718
And when you're standing
next to it,
635
00:39:46,718 --> 00:39:48,286
not only can you oversee it
636
00:39:48,286 --> 00:39:50,722
and hear the rumble
from the water,
637
00:39:50,722 --> 00:39:52,490
but if you touch
the rocks around it,
638
00:39:52,490 --> 00:39:55,260
you can feel them trembling.
639
00:39:55,260 --> 00:39:57,729
So the power there
is just unbelievable.
640
00:39:57,729 --> 00:40:05,637
(♪♪♪)
641
00:40:05,637 --> 00:40:09,307
The river that feeds
the largest waterfall in Europe
642
00:40:09,307 --> 00:40:14,078
is in turn fed by the largest
glacier in Europe,
643
00:40:14,078 --> 00:40:15,780
Vatnajokull,
644
00:40:15,780 --> 00:40:18,249
more than 100 miles
south of here.
645
00:40:20,852 --> 00:40:24,088
The river's glacial origins
are evident
646
00:40:24,088 --> 00:40:26,457
in its unusual silvery color.
647
00:40:27,759 --> 00:40:29,727
Tiny remnants of rocks
648
00:40:29,727 --> 00:40:31,829
that have been crushed
by the glacier
649
00:40:31,829 --> 00:40:35,099
are suspended in the river,
650
00:40:35,099 --> 00:40:38,436
creating an opaque-grey tint
in the rushing water.
651
00:40:40,872 --> 00:40:44,475
On its long journey
from glacier to sea,
652
00:40:44,475 --> 00:40:48,246
the river carves away
at the highland bedrock
653
00:40:48,246 --> 00:40:52,116
washing away rock fragments
to widen the valley.
654
00:40:52,116 --> 00:40:59,357
(♪♪♪)
655
00:40:59,357 --> 00:41:02,093
As the current
nears the highlands,
656
00:41:02,093 --> 00:41:04,162
it builds in power,
657
00:41:04,162 --> 00:41:05,697
forming rapids
658
00:41:05,697 --> 00:41:08,166
that plunge
into the canyon below.
659
00:41:09,500 --> 00:41:11,536
At the top of the falls,
660
00:41:11,536 --> 00:41:14,605
the force of the water
is powerful enough
661
00:41:14,605 --> 00:41:16,607
to flatten rocks at the edge.
662
00:41:21,245 --> 00:41:24,749
At the bottom,
the basin becomes larger
663
00:41:24,749 --> 00:41:28,820
as rushing water and sediment
wear away at the rock
664
00:41:28,820 --> 00:41:33,257
causing the waterfall
to recede upstream.
665
00:41:33,257 --> 00:41:35,526
It's slowly carving
the canyon
666
00:41:35,526 --> 00:41:37,695
that we have
below the waterfall.
667
00:41:37,695 --> 00:41:42,800
So in time it's slowly moving
further inland,
668
00:41:42,800 --> 00:41:45,103
carving the rock
that is underneath.
669
00:41:45,103 --> 00:41:47,271
So that's another form
of Iceland
670
00:41:47,271 --> 00:41:48,840
being under construction.
671
00:41:48,840 --> 00:41:51,342
If you would return
2,000 years from now,
672
00:41:51,342 --> 00:41:53,144
it would probably be
a little bit higher up
673
00:41:53,144 --> 00:41:54,479
than it is now.
674
00:41:54,479 --> 00:42:00,485
(♪♪♪)
675
00:42:00,485 --> 00:42:03,521
Dettifoss plummets
into a gorge,
676
00:42:03,521 --> 00:42:06,491
1,600 feet wide...
677
00:42:06,491 --> 00:42:09,761
...and 100 feet deep.
678
00:42:09,761 --> 00:42:12,230
This mighty canyon was formed
679
00:42:12,230 --> 00:42:14,799
by catastrophic
glacial flooding,
680
00:42:14,799 --> 00:42:17,368
sometime after the last Ice Age.
681
00:42:21,639 --> 00:42:25,843
A volcanic eruption underneath
the Vatnajokull glacier
682
00:42:25,843 --> 00:42:28,413
is believed to be
the source of the flood.
683
00:42:30,214 --> 00:42:31,482
At its peak,
684
00:42:31,482 --> 00:42:34,152
the flood roared
over the plateau
685
00:42:34,152 --> 00:42:37,588
with four times the power
of the Amazon River
686
00:42:37,588 --> 00:42:40,158
taking out everything
in its path.
687
00:42:42,260 --> 00:42:45,530
The spectacular collision
of fire and ice
688
00:42:45,530 --> 00:42:47,598
can wipe out entire landscapes.
689
00:42:50,134 --> 00:42:51,803
But as evidenced here,
690
00:42:51,803 --> 00:42:57,141
fire and ice work together
to create stunning new worlds.
691
00:43:01,546 --> 00:43:05,249
In the north of Iceland,
a barren plain,
692
00:43:05,249 --> 00:43:08,286
scarred by lava
from a volcanic eruption
693
00:43:08,286 --> 00:43:11,322
more than 9,000 years ago,
694
00:43:11,322 --> 00:43:13,791
gives way
to a tumbling waterfall,
695
00:43:13,791 --> 00:43:15,560
65 feet high.
696
00:43:18,229 --> 00:43:20,264
This is Aldeyjarfoss.
697
00:43:20,264 --> 00:43:28,072
(♪♪♪)
698
00:43:28,072 --> 00:43:29,640
Foaming glacial water
699
00:43:29,640 --> 00:43:32,777
gushes through
its narrow passage,
700
00:43:32,777 --> 00:43:37,748
thrashing into a wide basin
surrounded by basalt columns.
701
00:43:40,318 --> 00:43:44,622
These peculiar formations
are the result of lava flows
702
00:43:44,622 --> 00:43:48,826
that have cooled quickly,
contracted and cracked
703
00:43:48,826 --> 00:43:52,663
to create precise
geometric structures.
704
00:43:52,663 --> 00:43:53,798
Below the waterfall,
705
00:43:53,798 --> 00:43:57,368
we have this wonderful display
of the basalt columns
706
00:43:57,368 --> 00:43:58,769
that are hidden underground
707
00:43:58,769 --> 00:44:00,104
and we can only see them
708
00:44:00,104 --> 00:44:02,707
because this raging
torrent of water
709
00:44:02,707 --> 00:44:07,612
has carved this canyon for us
to get a peek into the Earth.
710
00:44:07,612 --> 00:44:10,815
These basalt columns are not,
all of them straight.
711
00:44:10,815 --> 00:44:13,818
It's very interesting
to watch them in that area
712
00:44:13,818 --> 00:44:16,087
because they're kind of--
they're curved,
713
00:44:16,087 --> 00:44:18,256
they're going in all
different directions.
714
00:44:18,256 --> 00:44:21,692
So around Aldeyjarfoss,
we have nature
715
00:44:21,692 --> 00:44:24,795
creating this
abstract piece of art for us.
716
00:44:24,795 --> 00:44:32,303
(♪♪♪)
717
00:44:32,303 --> 00:44:34,672
Not only
do Iceland's waterfalls sculpt
718
00:44:34,672 --> 00:44:37,842
its ever-evolving landscape,
719
00:44:37,842 --> 00:44:40,745
they have also played
a pivotal role in its culture.
720
00:44:45,449 --> 00:44:48,419
Godafoss, in north Iceland,
721
00:44:48,419 --> 00:44:50,488
is closely connected
to one of the most
722
00:44:50,488 --> 00:44:55,326
influential events
in the country's history:
723
00:44:55,326 --> 00:44:58,429
the conversion from heathendom
to Christianity
724
00:44:58,429 --> 00:44:59,797
in the year 1000.
725
00:45:03,367 --> 00:45:06,804
According to legend,
Iceland's lawspeaker,
726
00:45:06,804 --> 00:45:09,206
himself a pagan priest,
727
00:45:09,206 --> 00:45:11,776
was faced
with a growing religious crisis
728
00:45:11,776 --> 00:45:13,711
between Christians
729
00:45:13,711 --> 00:45:18,716
and those who worshipped
the old Nordic Gods.
730
00:45:18,716 --> 00:45:23,154
The lawspeaker declared
Iceland would become Christian.
731
00:45:23,154 --> 00:45:25,222
In a symbolic act,
732
00:45:25,222 --> 00:45:30,061
he hurled statues of the old
Norse Gods into the fall.
733
00:45:30,061 --> 00:45:33,497
Hence its name, Godafoss,
734
00:45:33,497 --> 00:45:35,266
the waterfall of the Gods.
735
00:45:39,337 --> 00:45:43,074
Even in the winter months,
when temperatures plummet
736
00:45:43,074 --> 00:45:45,743
and ice extends its grip,
737
00:45:45,743 --> 00:45:50,081
Iceland's waterfalls
continue to flow
738
00:45:50,081 --> 00:45:53,417
due to the sheer power
of the glacial rivers
739
00:45:53,417 --> 00:45:56,420
that pour from
its tremendous ice caps.
740
00:45:56,420 --> 00:46:06,063
(♪♪♪)
741
00:46:06,063 --> 00:46:07,365
Iceland is alive.
742
00:46:11,068 --> 00:46:13,304
Its landscape
is ever-evolving.
743
00:46:15,806 --> 00:46:19,176
Glaciers
that appear frozen in time
744
00:46:19,176 --> 00:46:21,445
are on the move,
745
00:46:21,445 --> 00:46:25,416
cutting away mountains
and gouging out valleys
746
00:46:25,416 --> 00:46:27,485
as they advance and retreat.
747
00:46:29,787 --> 00:46:32,523
It is a challenging wilderness,
748
00:46:32,523 --> 00:46:37,728
a place where cold waves
crash onto volcanic rock,
749
00:46:37,728 --> 00:46:42,066
where treacherous crevasses yawn
750
00:46:42,066 --> 00:46:44,001
and icebergs are born.
751
00:46:47,204 --> 00:46:49,640
Deep below its glaciers,
752
00:46:49,640 --> 00:46:54,378
molten lava burns
and volcanoes stir
753
00:46:54,378 --> 00:46:56,681
as fire and ice collide.
754
00:46:58,449 --> 00:47:02,219
But climate change
has tipped the balance.
755
00:47:02,219 --> 00:47:06,123
Iceland's glaciers are melting,
756
00:47:06,123 --> 00:47:10,027
freeing volcanoes
from their icy grip,
757
00:47:10,027 --> 00:47:14,699
triggering violent eruptions
and thundering floods
758
00:47:14,699 --> 00:47:16,233
that sculpt the land.
759
00:47:20,337 --> 00:47:23,107
Glaciers play a tremendous role
760
00:47:23,107 --> 00:47:26,644
in Iceland's
ever-changing environment.
761
00:47:26,644 --> 00:47:28,479
And yet
they are disappearing.
762
00:47:30,181 --> 00:47:33,350
Deep within the ice
lies history
763
00:47:33,350 --> 00:47:36,220
that scientists
need to extract
764
00:47:36,220 --> 00:47:38,222
before it vanishes forever.
765
00:47:40,658 --> 00:47:44,628
In 200 years,
Iceland's glaciers may be gone.
766
00:47:46,497 --> 00:47:47,798
For now,
767
00:47:47,798 --> 00:47:53,804
these icy giants
remain a frozen wonder.
768
00:47:53,804 --> 00:48:03,981
(♪♪♪)
769
00:48:03,981 --> 00:48:12,423
(♪♪♪)
770
00:48:12,423 --> 00:48:18,629
(♪♪♪)
57254
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