00:00We could soon build huge barrages in the Detroit of Bering
00:03to prevent the oceanic systems most importants of the Earth to effondre.
00:08But there is a big problem.
00:11If this system is weak enough before we finish the barrages,
00:14the project will turn to disaster.
00:18Instead of falling off, the barriers will accelerate
00:21and the entire planet will take effect.
00:27The Detroit of Bering is located between the Asie and the North of America
00:31and it is one of the most hostile places of the planet.
00:34L'eau y gêne and enormous blocks of banquise derives in the region.
00:39The tempest y font rage and of puissants currents traversent cet étroit passage.
00:45Despite these conditions cauchemardesques,
00:48researchers think that we might perhaps have to launch a construction.
00:52The reason is LAMOC,
00:54a vast system of currents of the Atlantic Ocean
00:57which transports of the cold water around the planet.
01:00It works like a gigantic system of circulation of heat.
01:05Without Lys,
01:07the temperatures in a large part of the North
01:09change radically.
01:12LAMOC is immense.
01:14Each second,
01:15it places around 20 millions of m3 of water across the ocean.
01:20It is about 100 times more than the Amazon
01:23and it does not only replace the water.
01:27LAMOC transports also an enormous amount of heat.
01:31About as much energy as 1 million of electricity.
01:36But this system moves very slowly.
01:40The surface of the ocean.
01:49The surface of the ocean.
01:52The ocean.
01:57The ocean.
02:02The ocean.
02:04The ocean.
02:04The ocean.
02:06The ocean.
02:15The ocean.中
02:21- Camees. The
02:32ocean. The
02:33ocean. The
02:36ocean.
02:36The climate change and agriculture would be hard to touch in certain areas.
02:42The effondrement of the amok would increase the global temperatures of about 0,2 degrees Celsius.
02:49It may seem a little, but the consequences would be catastrophic.
02:54So scientists are looking for a way to slow this effondrement.
02:58And the good answer could be the salt.
03:02It may seem strange, but the ocean contributes to the circulation oceanic.
03:08The cold and cold is more lourde than the ocean.
03:11And when it falls in the depths, it trains the big currents,
03:15like a tapis roulant that moves the ocean around the planet.
03:20But today, there is more water in the ocean,
03:24because of the clouds and the clouds are more abundant.
03:26The ocean is less light, and it weakens the process of plunging.
03:32That's why scientists are interested in the Bering in this moment.
03:37The ocean less salty from the Pacific Pacific
03:39traverses this intense passage towards the Arctic Arctic,
03:42and ends up reaching the North Atlantic.
03:46If we block partially the water between the Pacific Pacific and the Arctic,
03:50it could maintain the sea of the North Atlantic more salt and more lourdes,
03:54and allow the amok to continue to work.
03:57It's there that comes the project of the barrage.
04:00Three massive barriers covering about 80 km total.
04:05Two sections latérales of about 40 km each,
04:09with one more short section in the middle.
04:13Of course, building a such structure in a very isolated region would be extremely difficult.
04:19It would be extremely difficult.
04:20You would need ships, materials,
04:22materials, workers,
04:23carbonated,
04:24and gas lourdes.
04:25And all this would work in the glacier conditions,
04:29surrounded by bankies in movement and by a violent time.
04:32The cost would reach hundreds of billions,
04:35even hundreds of billions of dollars.
04:39And all this for one reason.
04:40To prevent the ocean circulation system of erupting.
04:45If that works,
04:46the population in Europe would not have to face a extreme cold weather.
04:52The coast of the North Atlantic could avoid a dangerous rise of the sea level.
04:57And the oceans would continue to cold out the planet.
05:01It's interesting.
05:03The idea of the barrage is not coming out of any part.
05:06It's a very long time,
05:08the Detroit of Bering was naturally blocked
05:10at different periods of the history of the Earth.
05:13And the specialists think that when it happened,
05:17the MOC became more stable.
05:19Unfortunately,
05:20the engineering of the barrage is perhaps not even the most difficult.
05:23It's true.
05:24It's true.
05:25The Detroit of Bering
05:26is in isolated waters,
05:28full of floodwaters,
05:30full of floodwaters,
05:31and extremely powerful winds.
05:34In many places,
05:36the water is about 50 meters deep.
05:38It's about the height of a building of 15 floors.
05:41Of course,
05:43building the barrage is very difficult.
05:47But there is still a bigger problem.
05:49To build it,
05:50it would require huge international agreements.
05:53And it's not a simple project of infrastructure.
05:56The structure could directly affect the ocean circulation,
06:00the temperatures,
06:01the level of the sea level
06:02and the weather around the planet.
06:06It would also disturb the most important routes
06:09in the Arctic.
06:10Today,
06:12the cargoes,
06:13the petroliers,
06:13the fishing ships
06:14and scientific expeditions
06:16will take place.
06:20If we were blocked it,
06:22it would affect the maritime transport
06:23in the Grand Nord
06:24and completely transform the ecosystem
06:27of marine ecosystems
06:27that exist there for thousands of years.
06:31The environmental damage could be huge.
06:33The fish,
06:34the fish and other marine animals
06:36migrate through the Detroit every year.
06:39A giant barrier
06:40will destroy its itinéraires
06:42and never change the Pacific Pacific
06:45and the Arctic.
06:48And even if the project worked,
06:50it would not solve the problem of the pond.
06:52The planet continues to heat up
06:55and the glaciers of Groenland
06:56continue to fond.
06:59The water water will continue to deversy
07:01in the Atlantic
07:02by other sources.
07:03The river can only ralentir
07:05a part of the process.
07:08The climate system is incredibly complex.
07:11It changes a part of the ocean
07:13and it creates a reaction in chains
07:15at thousands of kilometers.
07:17So scientists have launched
07:19some computer simulations
07:20to see what would happen
07:22if humanity would block the Detroit of Bering.
07:26The model showed that the bridge
07:27could effectively stabilize the MOC,
07:30but only if the current current
07:31is still relatively sain
07:33at the beginning of the work.
07:36In this scenario,
07:38the Atlantic North
07:39becomes more saly.
07:40It gives a bit more
07:42of the marge
07:42before all the water
07:44of the water
07:45from the glass of Groenland
07:46will not paralyze everything.
07:49But if the MOC
07:50is too weak
07:51before the construction of the bridge,
07:53the effect could be reversed.
07:56And instead of helping the circulation,
07:57the barrier would accelerate the flood.
08:02All this because the bridge
08:04would probably increase the bank
08:05in the Arctic.
08:08At the beginning,
08:09it may seem positive.
08:10Plus of glass
08:11means generally
08:12more light
08:13will be transferred
08:14into the space.
08:15Moins of heat
08:16will be placed in the surface.
08:18The region
08:19will be better
08:19and this refroidissement
08:21can also produce
08:22even more glass.
08:23But all this glass
08:25supplémentaire
08:26reduces also
08:27the evaporation.
08:30The ocean
08:30evaporates.
08:31It goes into the atmosphere
08:32but the water
08:33remains.
08:35It is one of the main reasons
08:37why the water
08:37becomes more saly
08:39with the time.
08:42Imagine
08:42that you make
08:43the water
08:43in a casserole.
08:45At a moment,
08:46the water
08:46escapes
08:47but the water
08:48remains.
08:50The water
08:50will be better
08:52and the water
08:53The ocean
08:54works in a similar way
08:56and if the evaporation
08:57slow down,
08:58less water
08:59will be better
09:00and the ocean
09:01will be better
09:01than the water
09:03will become more saly.
09:05For the MOC,
09:07it is a bad news
09:08because
09:08all this system
09:09depends on
09:10the water
09:10and saly
09:12which plonges
09:12into the depths
09:13of the Atlantic.
09:14If the water
09:15becomes more douce,
09:16the circulation
09:20the water
09:21will be better
09:22and the water
09:23will be better
09:23and the water
09:24will be better
09:25to repair
09:26the damage.
09:28According to the models,
09:29since the MOC
09:30has reduced
09:30about 16%
09:33the water
09:33will stop
09:34and reduce
09:35the problem.
09:36And the most frightening
09:37is that
09:38no one knows
09:39if we are already
09:40close to this level.
09:44Even the experts
09:45admit that
09:46despite the power
09:47of our climate models,
09:49the ocean
09:49of the Earth
09:50are extremely chaotic.
09:53The minuscule
09:54changes
09:54can cause
09:55massive effects
09:56but decades
09:57later,
09:58which leads us
09:59to a uncomfortable conclusion.
10:01We are talking
10:02about the giant mur
10:03of the ocean
10:04and to
10:05remodel the Arctic
10:06while reducing
10:07the energy
10:07fossiles
10:08would be perhaps
10:09the simplest solution
10:10of the ocean
10:10is quite simple.
10:12of the ocean
10:12of the ocean
10:12of the ocean
10:12.
10:12of the ocean
10:13.
10:13the ocean
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