Imaginez que l'atmosphère terrestre se retourne—les choses deviendraient folles ! 🌎 Normalement, l'air chaud reste près de la surface, et des couches d'air plus fraîches sont au-dessus, mais si cela s'inversait, le ciel piégerait l'air froid près du sol. 🌬️ Cela signifie que nous gèlerions au niveau de la mer tandis que les sommets des montagnes pourraient être agréablement chauds. 🏔️ Le temps deviendrait chaotique—les schémas de pluie s'inverseraient, et nous pourrions même voir de la neige sous les tropiques tandis que les déserts pourraient être inondés. 🌧️ Les avions devraient faire face à des turbulences imprévisibles car les courants d'air seraient totalement chamboulés. ✈️ Le monde serait méconnaissable, et les scientifiques s'efforceraient de comprendre comment survivre dans cette nouvelle Terre sens dessus dessous ! Animation créée par Sympa.
----------------------------------------------------------------------------------------
Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
----------------------------------------------------------------------------------------
Nos réseaux sociaux :
Facebook: https://www.facebook.com/sympasympacom/
Instagram: https://www.instagram.com/sympa.officiel/
Stock de fichiers (photos, vidéos et autres):
https://www.depositphotos.com
https://www.shutterstock.com
https://www.eastnews.ru
----------------------------------------------------------------------------------------
Si tu en veux encore plus, fais un tour ici:
http://sympa-sympa.com
----------------------------------------------------------------------------------------
Musique par Epidemic Sound https://www.epidemicsound.com
Pour ne rien perdre de Sympa, abonnez-vous!: https://goo.gl/6E4Xna
----------------------------------------------------------------------------------------
Nos réseaux sociaux :
Facebook: https://www.facebook.com/sympasympacom/
Instagram: https://www.instagram.com/sympa.officiel/
Stock de fichiers (photos, vidéos et autres):
https://www.depositphotos.com
https://www.shutterstock.com
https://www.eastnews.ru
----------------------------------------------------------------------------------------
Si tu en veux encore plus, fais un tour ici:
http://sympa-sympa.com
Category
😹
FunTranscript
00:00One day you walk in the street, wearing a mask connected to an oxygen bottle.
00:05There are no clouds in the sky.
00:07It's been several months that there are no clouds anywhere in the world.
00:11You notice a young girl who has trouble breathing.
00:14You lend her your mask so that she can breathe again.
00:17Then someone suddenly shouts,
00:19Put yourself in the shelter!
00:21You then hear a loud whistle,
00:23and you see a kind of invisible force
00:25that tears the trees from the ground and moves the parked cars.
00:30You hide in the nearest house.
00:33A icy and powerful wind sweeps the landscape.
00:37All these strange phenomena are due to the atmosphere that has reversed.
00:41To understand what would happen if the atmosphere of the Earth changed so radically,
00:46we must first understand what an atmosphere is.
00:49In simple terms, it is an air cover that envelops our planet.
00:54It warms us up, protects us and allows us to breathe.
00:58The atmosphere is made up of five main layers.
01:01The troposphere, the stratosphere, the mesosphere, the thermosphere and the exosphere.
01:07The troposphere is the heaviest layer.
01:09It represents about 80% of the total mass of the atmosphere.
01:13Clouds, dust and water particles fly in this first layer.
01:17It contains more oxygen than the other layers
01:20and exerts the strongest atmospheric pressure on us.
01:23In fact, all the air around us has a weight.
01:26At ground level, this weight is about 15 pounds per square inch.
01:30The air envelops all material objects,
01:33but we do not feel these 15 pounds per square inch, or psi,
01:37because our internal pressure is equal to this value.
01:40The air is dispersed in the atmosphere and on the ground.
01:43The higher we go up, the lower the atmospheric pressure and oxygen levels.
01:48For example, mountaineers,
01:50when climbing a high mountain,
01:52use oxygen bottles to allow their bodies to adapt to air changes.
01:57In airplanes, the pressure is artificial,
02:00so that passengers feel comfortable taking off, landing
02:04and throughout the flight.
02:06The most saturated and, at the same time, the heaviest air
02:10is therefore in the first layer.
02:12But in an inverted atmosphere, it would be the furthest from us.
02:16The next layer is the stratosphere.
02:18It acts as a shield.
02:20The stratosphere is made up of ozone,
02:22which absorbs most of the solar radiation and prevents it from reaching the ground.
02:27In other words, the sun's rays are filtered by the stratosphere.
02:31They lose their harmful properties,
02:33and our planet is heated up without being threatened.
02:37Then comes the mesosphere.
02:39It is in this layer that the temperatures are the lowest.
02:42The atmospheric pressure there is low,
02:45but the air is dense enough to burn meteorites.
02:49The thermosphere follows the mesosphere.
02:51It is subjected to the sun's rays.
02:53The temperature there is about 2,000 degrees Celsius,
02:56which is almost half as high as in a volcano.
03:00The last layer is the exosphere.
03:02It is the last frontier of our atmosphere.
03:05After that, it's space.
03:07The pressure there is so low that gas molecules escape
03:10and flow to distant stars.
03:12This is how things happen in an ordinary atmosphere.
03:16The sun's rays illuminate the exosphere,
03:19where almost nothing happens.
03:21They then heat up the thermosphere
03:23and cross the cold mesosphere.
03:26The sun's light cools down
03:28by passing through the ozone layer in the stratosphere.
03:31Then, these rays cross the heaviest and densest layer,
03:35the troposphere, and reach the ground.
03:39Now let's see how all this would work
03:41in an inverted atmosphere.
03:43The troposphere, with all the clouds, water and oxygen,
03:47would rise upwards.
03:49The sun's rays would burn all the humidity.
03:51The clouds would disappear from the sky.
03:54Then, the sun's rays would cool down
03:57by slightly crossing the ozone layer.
04:00The stratosphere would absorb all the radiation.
04:03The rays would then cross the cold mesosphere
04:06and quickly reach the surface of our planet.
04:09The thermosphere and the exosphere
04:11would have virtually no effect on the rays.
04:14If our planet had an inverted atmosphere,
04:17drought would take place on a large scale.
04:20All the rain clouds would disperse in the upper layers.
04:24All the earth's humidity would begin to evaporate
04:27and accumulate in the exosphere and the thermosphere.
04:30We would then have a new troposphere.
04:33It would be filled with gas, water and dust particles.
04:37The old troposphere, which would now be at the top,
04:40would lose its weight and turn into an exosphere.
04:44But what would happen to the oxygen?
04:47The higher we go, the lower the pressure,
04:49and the less oxygen there is.
04:51But in the inverted atmosphere,
04:53there would be less oxygen and less pressure
04:55closer to the surface of the earth.
04:57At first, people would feel like they were on Mount Everest.
05:02Many would lose their knowledge
05:04or be taken by violent vertigo.
05:06Others would have severe migraines
05:08and would feel bad because of the expansion of the blood vessels.
05:12But what would happen to people
05:14who are used to climbing high mountains?
05:16They would adapt more easily.
05:18All the others would do the same, but more slowly.
05:22And when people would feel comfortable in such conditions,
05:25they would start to benefit from it.
05:28We would feel less resistance to the air.
05:30It would be a bit like the vacuum in space.
05:33Cars would drive faster and consume less fuel.
05:37People would create trains that could move at the speed of sound.
05:41We would be less tired when we had to run.
05:44But at the same time, planes would fly much slower
05:47because they would have to go through thick layers of air.
05:50It would not rain for long and it would still be sunny.
05:53Instead of having a bad weather,
05:55we would be confronted with currents.
05:58Today, these powerful icy winds
06:00circulate in the upper layers of the atmosphere.
06:03They blow on the top of Mount Everest
06:05and pose a serious danger for climbers.
06:08When the sun's rays heat up the air,
06:10it rises and meets cold winds
06:13that push the hot air even higher.
06:15It then turns into a stream.
06:18This type of wind blows at 112 km per hour.
06:21It can easily tear down a tree or roofs.
06:24We would have to build houses and solid shelters
06:27to survive this calamity.
06:29But at the end of the day,
06:31the Earth's surface would warm up
06:33and push the icy currents up.
06:35In other words, even if the atmosphere
06:37went up and down,
06:39everything would come back to its place sooner or later.
06:42This may happen in a few hundred or millions of years.
06:46In any case, the laws of physics and nature
06:49will bring our planet back to its previous state.
06:52But all living creatures may not live long enough
06:55to witness it.
06:57But what would happen if the atmosphere of the planet
06:59went back constantly?
07:01It is unlikely that this will happen on Earth,
07:03but there is a spatial object in the solar system
07:06whose atmosphere is inverted.
07:08All the solid elements that are there evaporate and rise,
07:11while the atmosphere sinks and becomes denser.
07:14Thus, the ground and the sky of this spatial crust
07:17keep tilting.
07:19This strange celestial object is Pluto,
07:21the ancient planet.
07:23The average distance between Pluto and the sun
07:26is about 5.8 billion kilometers.
07:29Pluto's orbit is elliptical,
07:31that is, oval and tilted
07:33compared to the orbit of other planets.
07:36When Pluto approaches the sun,
07:38it receives a little heat.
07:40This heat is then enough
07:42to transform the surface ice into gas.
07:45The more this gas rises,
07:47the more it warms up.
07:49It is quite strange,
07:51because on Earth it is the opposite.
07:53The higher the air is, the colder it is.
07:56Now imagine a world
07:58that does not have a solid surface,
08:00but only an atmosphere.
08:02This is Jupiter,
08:04the largest planet in our system,
08:06and which is made up of gas.
08:08It is composed of 90% hydrogen,
08:11the remaining 10% being essentially made up of helium.
08:14Jupiter retains all its gases in its breast
08:17thanks to its powerful force of gravity.
08:19And the closer they are to the center,
08:21the more their concentration is important.
08:23If a huge spaceship
08:25tried to land on the surface of Jupiter,
08:27it would take a long time
08:29to reach the core of the planet.
08:31But in reality,
08:33it would be impossible for it to reach this center,
08:35because the weight of the surrounding gases
08:37would crush it fatally.
08:39Saturn has a similar structure.
08:41The gravity of the gases of this planet
08:43is so strong that it spins its rings,
08:45which are made up of pieces of comets
08:47and asteroids.
08:49This atmospheric air cover
08:51on our planet
08:53is ideal for all living creatures.
08:55For millions of years,
08:57evolution has created organisms
08:59capable of adapting to these atmospheric conditions.
09:01A good thing, isn't it?