Antarctica gives birth to “A-76 Iceberg”(world’s largest iceberg)

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The world’s largest existing iceberg has been found in Antarctica. It has been named as A-76 by scientists.

About A-76 Iceberg:

  • A-76 Iceber has been spotted in the satellite images captured by the European Space Agency’s Copernicus Sentinel-1 mission.
  • Formation: The iceberg has been formed after it broke away from Antarctica’s Ronne Ice Shelf. It is now floating freely in the Weddell Sea, a large bay in western Antarctica.
  • Features: The iceberg is shaped like a giant ironing board. It is measured around 170 km in length and 25 km in width. This makes the A-76 to become slightly larger than the Spanish island of Majorca.
  • The Largest Existing Iceberg: A-76 is now designated as the largest existing iceberg on the planet. It surpassed the A-23A (It is also floating in the Weddell Sea).
  • Significance: Once this iceberg melts, it will not lead to a sea-level rise because it was part of a floating ice shelf. It is just like a melting ice cube doesn’t increase the level of the water in the glass.
    • This makes the icebergs like this different from glaciers or ice sheets. Glaciers or ice sheets found on land, and they raise global sea levels when they break off into the ocean and melt.

Source: TOI

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Anjali saini
Anjali saini
4 years ago

I have confused that why it will not increase the sea level rise ?

HarsH
HarsH
4 years ago
Reply to  Anjali saini

Lets first understand the difference between icebergs & glaciers/ ice sheets.
Iceberg are present in ocean and they float on water. ex A76
Whereas, glaciers or ice sheets are formed on land surface. ex Himalayan glaciers

When glacier melst then water which unfreeze from that glacier subsequently enters sea/ocean therefore increasing water level.
But when icebergs melt, there is no change in water level, cuz when it melts the volume of water unfreeze is equal to weight of that iceberg or space occupied that iceberg initially. (Experimental: take a glass with half filled water add a ice cube, note down its level before ice melts and after ice melt……u will notice same water level)

Hope ur confusion got resolved. ATB

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