Tag: antarctica

European satellites capture images of the world’s largest iceberg, the size of Mallorca
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European satellites capture images of the world’s largest iceberg, the size of Mallorca

A huge iceberg has broken off the western side of the Ronne Ice Shelf, in the Weddell Sea, Antarctica. The iceberg, nicknamed 'A-76', measures around 4,320 square kilometers, making it the largest iceberg in the world, and has been spotted by the Copernicus Sentinel-1 mission of the European Space Agency (THAT). 'A-76' is around 170 km long and 25 km wide, which makes it in a mass slightly larger than the island of Mallorca. This type of phenomenon is quite common, however there are seldom cases of such large icebergs: Until now the first place had been the 'A-23A' with its approximately 3,880 square kilometers in size -also located in the Weddell Sea-.Usually scientists they enc...
The rise in sea level due to the Antarctic thaw could be catastrophic in the coming decades, scientists warn
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The rise in sea level due to the Antarctic thaw could be catastrophic in the coming decades, scientists warn

If global warming exceeds 2 degrees, the risk that the ice shelves on the perimeter Antarctic melt would increase remarkably and their collapse would trigger a rapid thaw.SIGHT: The melting of Antarctica will raise the sea level 30% more than expectedThat would result in at least 0.17 centimeter global average rise in sea level per year in 2060 and beyond, according to a new study published in the journal Nature.That is faster than the average rate of sea level rise in the last 120 years and, in vulnerable coastal locations, has already led to a dramatic increase in extreme flood days.SIGHT: How climate change is changing the Earth's axis of rotationGlobal warming of 3 degrees Celsius could cause a catastrophic rise in sea level due to the melting of Antarctica, an increase of at least 0....
The place on Earth that comes closest to total isolation from outer space
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The place on Earth that comes closest to total isolation from outer space

Scientists are continually discovering new types of health risks associated with space, related to how factors such as microgravity and cosmic radiation affect our bones and organs.But as it collects Science Alert, prolonged exposure to the space environment is not just a concern for our bodies. What about our minds? The psychological effects of isolation and the extreme confinement during long-term space travel and missions to other planets still represents a great unknown.If we are ever to successfully travel through space and even colonize other worlds, we must understand much more about what happens to women. people trapped in unforgiving places for long periods, while they are very, very ...
‘Ocean in crisis’: Global plan to protect world’s seas
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‘Ocean in crisis’: Global plan to protect world’s seas

A new global marine initiative has been launched to protect and conserve 18 million square kilometres of the ocean (seven million square miles) over the next five years, an area larger than the continent of South America. The collaboration, known as Blue Nature Alliance, established on Wednesday is led by several philanthropic organisations and plans to work with national governments, local communities, Indigenous peoples, scientists, and academics. The Alliance’s initial protection work will cover 4.8 million sq km (1.9 million sq miles) across three marine locations: Fiji’s Lau Seascape, Antarctica’s Southern Ocean and the volcanic archipelago of Tristan da Cunha in the southern Atlantic Ocean. “The ocean is in crisis,” said Karen Sack, the president and CEO of Ocean Unite, one of the or...
Sci&Tech

Particles of a Meteor Explosion From 430,000 Years Ago Found Hidden in Antarctic Ice

Approximately 430,000 years ago, a meteorite exploded over Antarctica.The only reason we know about it now is because scientists have just found tiny, once-molten particles of space rock that have been hidden away in the ice ever since.  Based on an analysis of those particles, the event was an unusual one - not quite powerful enough to produce an impact crater, but nor was it a lightweight. The jet of melted and vaporized material that blasted from the mid-air explosion would have been more hazardous than the Tunguska event that flattened a Siberian forest in 1908.Although crater-producing impacts are fairly rare, rocks entering and exploding in Earth's atmosphere are not. They're called bolides, and NASA has logged 861 of them since 1988 at time of writing. Superbolides - those like the...