Le Plus Grand Iceberg Au Monde S'Est Détaché Et A Dérivé Vers L'Atlantique

Sympa

Saviez-vous que le plus grand iceberg du monde navigue actuellement à travers l'océan ? Il s'appelle A23a et s'est détaché pour la première fois de la barrière de glace Filchner en 1986 ! Pendant des décennies, il est resté immobile (littéralement) dans la mer de Weddell, coincé sur les fonds marins. Puis, il a recommencé à se déplacer en 2020, pour être ensuite piégé dans un vortex océanique appelé la Colonne de Taylor. Mais en décembre 2024, il s'est enfin libéré et se dirige maintenant vers l'île de la Géorgie du Sud. Oh, et tenez-vous bien — il fait plus de 4 300 kilomètres carrés, ce qui le rend plus de trois fois plus grand que la ville de New York !  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

Transcript

00:00You are on the pont of the ship when a black and gray mass appears to the horizon.

00:06In a manner of a nightmare or a horror movie, a strange brume approche slowly from the building.

00:12It seems without fin, impossible to distinguish where it starts and ends.

00:16In a rien of time, the ship is minuscule, perdu in a mer of glass.

00:20It is then that you understand, it is not the brouillard, but an iceberg,

00:24and your ship is on the point of knowing the same sort that the Titanic.

00:28This kind of scene is actually quite plausible,

00:31because the biggest iceberg in the world, called A-23A,

00:35is removed after being left prison for several months of a gigantic ocean turbine.

00:41It is the second time, in a few years only, that this colossus of glass comes to release.

00:46The first comes to 2023.

00:48After being left out on the ground for not less than 37 years,

00:52the iceberg was made to err on the grays of the currents.

00:55It covers an equivalent to three times that of New York.

00:58Its weight is also about 1000 milliards of tons.

01:02This glacier glacier is detached for the first time from the glacier plate of Fischner,

01:06in Antarctica, in 1986.

01:09But instead of deriving, it was immobilized on the high fonds,

01:13at a weak distance from its point of rupture.

01:15It has thus fonded much more slowly than most icebergs.

01:18It is in December 2023 that A-23A is finally released for the good,

01:23entamant a lente derive along the Antarctic.

01:25However, its course has quickly been interrupted.

01:28It is found close to not far from the East,

01:31in the East,

01:32took place in what we call a column of Taylor.

01:35A gigantic tourbillons,

01:37which is formed when the currents currents circulate

01:40around a marine mountain.

01:42At a moment,

01:43the iceberg is turning on himself

01:45at about 15 degrees per day,

01:46in the inverse of the stars of a guard.

01:48But since the 13th of December 2024,

01:51A-23A is able to get out of this column of Taylor,

01:54and move on again.

01:56The scientists observe attentively his journey,

01:59curious to know if he will take the same trajectory

02:02as other icebergs,

02:03or if he will follow an inevitable route.

02:05The icebergs,

02:06as gigantic as the A-23A,

02:08liberate nutrients in the environmental water

02:11when they are sinking.

02:12This phenomenon can actually create

02:14some living areas in the ocean,

02:16usually deserts.

02:17However,

02:18there is still a lot to understand

02:20how the characteristics such as the size,

02:23the form,

02:24or the origin of an iceberg,

02:25influence this process.

02:26To learn more,

02:28the researchers have begun to collect

02:30some of the particles of water

02:31that A-23A is susceptible to traverse.

02:34And they will continue to

02:36in the prelever all along their derives,

02:38hoping that this will allow us

02:40to better understand the impact

02:41of the icebergs massifs

02:42on the marine ecosystems

02:44around.

02:45In fact,

02:46the glacier to which our Colosse

02:48belonged would be

02:49an old man,

02:50literally millenniaire.

02:52In Antarctica,

02:53the most ancient glace

02:55could date of

02:56about a million years ago.

02:57In Groenland,

02:58she reached more

02:59than 100.000 years ago.

03:00While in Alaska,

03:01the most ancient glace

03:03never recovered

03:04discovered in a basin

03:06between the Mont Bonnat

03:07and the Mont Churchill

03:08has about 30.000 years ago.

03:10A bambin

03:11next to the others.

03:12In a typical glacier

03:13of Alaska,

03:14in a typical valley

03:15of Alaska,

03:16it takes about 100 years

03:17for the recently formed

03:18across the entire glacier.

03:20The glacier

03:21of Bering,

03:22the most vast

03:23of this state,

03:24with its 225 kilometers

03:25of long,

03:26its glace

03:27has been able to traverse

03:28in less than 400 years.

03:29This shows

03:30the constant movement

03:31of a glacier

03:32of such an ample amount.

03:33Now,

03:34the Alley des Icebergs,

03:35a tronçon

03:36of the Atlantic Ocean

03:37which relie the Arctic

03:38to Terre-Neuve.

03:39If you dream

03:40of seeing a multitude

03:41of icebergs,

03:42it is there

03:43to make sure

03:44many blocks of glass

03:45traverse this region,

03:47most from the Groenland.

03:49In winter and summer,

03:51large fragments

03:52of glaciers

03:53get out

03:54by the currents north-sud

03:55across the Baie

03:56of Baffin

03:57to reach the Mer

03:58of the Labrador

03:59where they end up

04:00from.

04:01Some also come from

04:02from the Canadian coast

04:03to Davis

04:04to arrive

04:05towards the Mer

04:06of the Labrador

04:07and along the coast

04:08east and west

04:09of Terre-Neuve.

04:10These large blocks

04:11of glass are also

04:12very old,

04:13from around 10,000 years.

04:15Each year,

04:16between 400 and 800

04:17icebergs

04:18of average

04:19across the Alley

04:20of the Icebergs.

04:21The speed of their

04:22derives depends

04:23of their volume,

04:24their shape,

04:25currents,

04:26waves and the wind.

04:27But the average

04:28is less than 600

04:29meters per hour.

04:30There are six types

04:31of icebergs

04:32traversing the Alley.

04:33The icebergs

04:34tabulaires

04:35are large

04:36large than large

04:37than large.

04:38The icebergs

04:39trapus

04:40have abrupt

04:41and angles

04:42similar to

04:43pyramids

04:44tronqués.

04:45The icebergs

04:46biseautés

04:47have a

04:48wide

04:49and a

04:50wide

04:51wide

04:52wide

04:53wide

04:54wide

04:55wide

04:56wide

04:57wide

04:58wide

04:59wide

05:00large

05:01of

05:02the

05:03icebergs

05:04are

05:05very

05:06different.

05:07The

05:08icebergs

05:09are

05:10very

05:11dangerous.

05:12Today,

05:13the satellites

05:14follow the icebergs

05:15have

05:17to avoid

05:18accidents.

05:19But the

05:20most

05:21reduced

05:22is a danger

05:23for the small

05:24embarcations.

05:25In 2018,

05:26an iceberg

05:27has made the

05:28big

05:29icebergs

05:30dominate the

05:31houses

05:32have

05:33turned

05:34the

05:35web.

05:36He is

05:37found

05:38in 100

05:39mètres

05:40of

05:41a

05:42vast

05:43over the

05:44past

05:45to assist

05:46to something

05:47magnificent and

05:48great

05:49tragedy.

05:50His existence

05:51has led to

05:52one of the biggest

05:53catastrophe

05:54of history.

05:55Look,

05:56a huge

05:57block of

05:58ice

05:59is

06:00made

06:01of

06:02the

06:03sea

06:04of

06:05the

06:06icebergs

06:07are

06:08in

06:09the

06:10sea

06:11of

06:12mountain.

06:13Malgré sa taille,

06:14il reste relativement

06:15paisible et s'éloigne

06:16des navires ainsi

06:17que des principales voies

06:18de maritime proches

06:19de son glacier

06:20natal.

06:21Cependant,

06:22il commence à dériver vers

06:23the sud,

06:24bien plus loin que la plupart

06:25des icebergs.

06:26En général,

06:27des blocs comme celui-ci

06:28fondent bien avant de

06:29parvenir dans des eaux

06:30aussi chaudes.

06:31Parmi les

06:3215 000 à 3 000 icebergs

06:34qui se détachent des glaciers

06:35et du Groenland

06:36chaque année,

06:37seuls 1% environ

06:38parviennent jusqu'à

06:39l'Atlantique.

06:40La trajectoire exceptionnelle

06:42de cet iceberg,

06:43qui atteint plus de 8 000 km

06:45au sud du cercle arctique

06:46en avril,

06:47le rend véritablement unique.

06:49Même après plusieurs mois

06:50de fonte,

06:51ce bloc de glace

06:52reste d'une taille

06:53impressionnante.

06:54Il pèse environ

06:551,5 million de tonnes,

06:56soit près de deux fois

06:57le poids du pont du Golden Gate.

06:59Au-dessus de l'eau,

07:00sa partie visible

07:01s'élève à plus de 30 mètres.

07:03Mais,

07:04comme la plupart des icebergs,

07:05la majorité de sa masse,

07:07environ 90%,

07:08demeure sous la surface.

07:11L'histoire de cet iceberg

07:12prend une tournure tragique

07:13le 14 avril 1912,

07:15lorsque,

07:16devinez quoi ?

07:17Et oui,

07:18il croise le paquebot

07:19Titanic.

07:20Le navire se trouve

07:21à environ 600 km

07:22de Terre-Neuve

07:23dans l'Océan Atlantique Nord,

07:24lorsque l'iceberg

07:25semble surgir de nulle part.

07:27L'équipage ne le repère

07:28que quelques minutes

07:29avant la collision.

07:30Pourquoi ne l'ont-ils

07:32pas vu plus tôt ?

07:33Une excellente question.

07:35La plupart des gens

07:36imaginent les icebergs

07:37comme de grands blocs

07:38de glace d'un blanc

07:39éclatant,

07:40souvent recouverts de neige.

07:41Pourtant,

07:42en réalité,

07:43les icebergs existent

07:44sous une multitude

07:45de couleurs.

07:46Certains présentent

07:47des rayures,

07:48des motifs,

07:49ou même des tourbillons

07:50semblables à des bonbons.

07:51Et il est même possible

07:52qu'ils soient noirs.

07:53Un iceberg peut devenir noir

07:56de deux manières.

07:57Lorsque la glace

07:58est extrêmement pure,

07:59sans bulles ni fissures,

08:00elle absorbe toute la lumière

08:02au lieu de la renvoyer,

08:03ce qui lui donne

08:04une apparence sombre.

08:05Une autre possibilité

08:06est qu'une éruption volcanique

08:08recouvre un glacier de cendres.

08:10Si un morceau de ce glacier

08:11se détache,

08:12il peut revêtir

08:13une teinte noire.

08:14Les chercheurs

08:15ne sont toujours pas certains

08:16de la raison pour laquelle

08:17l'iceberg du Titanic

08:18semblait sombre.

08:19Ou même si c'était

08:20réellement le cas.

08:21Cependant,

08:23la vigie a affirmé

08:24qu'il paraissait noir.

08:25Un autre matelot

08:26l'a décrit

08:27comme gris,

08:28ou gris foncé.

08:29Une hypothèse suggère

08:30que ce bloc

08:31ait pu être

08:32un iceberg noir,

08:33formé lorsque

08:34la partie supérieure fond,

08:35ce qui entraîne

08:36un basculement

08:37de l'iceberg.

08:38Si la partie inférieure

08:39est suffisamment lisse

08:40pour absorber la lumière,

08:41il apparaît

08:42alors sombre.

08:43Cependant,

08:44même si l'iceberg

08:45n'était pas véritablement noir,

08:46la nuit a certainement

08:47dû compliquer sa détection.

08:49Les icebergs

08:50réfléchissent peu

08:51la lumière,

08:52notamment lorsqu'ils sont

08:53irréguliers

08:54ou verticaux.

08:55Ils se fondent alors

08:56dans l'océan sombre

08:57et scintillant.

08:58Sans radar,

08:59il est extrêmement difficile

09:00de repérer

09:01un iceberg la nuit,

09:02ce qui explique

09:03probablement

09:04pourquoi l'équipage

09:05du Titanic

09:06ne l'a pas aperçu

09:07de la nuit.

09:08Il n'y a pas d'eau.

09:09Il n'y a pas d'eau.

09:10Il n'y a pas d'eau.

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