National Geography recognises ‘Southern Ocean’ as globe’s fifth ocean
Southern Ocean
- It is the only ocean to touch three other oceans and to completely embrace a continent (Antarctica) rather than being embraced by them.
- It is limited to 60 degrees south.
- It is also defined by its Antarctic Circumpolar Current that was formed 34 million years ago. ( It is an ocean current that flows clockwise (as seen from the South Pole) from west to east around Antarctica.)
- The oceanic ring acts as an invisible wall that encloses Antarctica in freezing, less salty waters than northern waters. This separation makes the continent and the Southern Ocean ecologically distinct, hosting countless diverse organisms.
- The Southern Ocean is home to large populations of whales, penguins and seals. But industrial fishing on species like krill and Patagonian toothfish had been a concern for decades.
Why in the news?
- The National Geography cartographers have now identified the Southern Ocean as the fifth ocean on the planet.
- The organisation aims to promote conservation and awareness to the fragile ecosystem where thousands of marine species like whales, seals, and penguins live.
- The recognition will have an impact on education, where students will learn about this ocean and understand its importance.
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