After decades of gradual increases, Antarctic sea ice is now decreasing faster than that in the Arctic, according to new research based on 40 years' worth of satellite data
After decades of gradual increases, Antarctic sea ice is now decreasing faster than that in the Arctic, according to new research based on 40 years' worth of satellite data. Sea ice has a crucial impact on the Earth's climate, says Claire Parkinson, a senior scientist at NASA and the author of the new study. Its bright surface reflects 50% to 70% of sunlight back into space. But when sea ice melts, it turns into dark ocean surface, which absorbs 90% of the sunlight.
Boaty McBoatface makes significant climate change discovery on first missionParkinson said it is too early to determine what exactly caused the trend to reverse.Scientist were never able to determine why Antarctic sea ice increased prior to 2014. Dr Kaitlin Naughten, sea ice modeller at British Antarctic Survey, said Antarctica is largely protected from atmospheric warming by the westerly winds which surround the continent.
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After growing for decades, Antarctic sea ice suddenly plunged. Scientists are stumpedAround Antarctica, sea ice averaged 4.9 million square miles in 2014. By 2017, that average fell to a record low of 4.1 million square miles. That difference would cover an area larger than Mexico.
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Antarctic sea ice is shrinking rapidly after decades of growth. Scientists aren’t sure why.Researchers have long struggled to explain the unusual behavior of ice floating in the ocean around the planet's southernmost continent.
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