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The connection between Antarctic Volcanic Eruptions and abrupt Climate Change: Study

Joseph McConnell conducted the study

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The connection between Antarctic Volcanic Eruptions and abrupt Climate Change
The connection between Antarctic Volcanic Eruptions and abrupt Climate Change. Pixabay
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  • The Climate change that began approximately 17,700 years ago included a sudden poleward shift in the westerly winds encircling Antarctica
  • Joseph McConnell’s ice core laboratory enabled high-resolution measurements of ice cores extracted from remote regions of the Earth, such as Greenland and Antarctica
  • West Antarctic Ice Sheet Divide core was drilled to a depth of more than 3,405 meters

New York, USA, September 7, 2017: A series of volcanic eruptions in the Antarctica coincided with increased deglaciation and rise in global greenhouse gas concentrations about 17,700 years ago, says a study.

“Detailed chemical measurements in Antarctic ice cores show that massive, halogen-rich eruptions from the West Antarctic Mt. Takahe volcano coincided exactly with the onset of the most rapid, widespread Climate Change in the Southern Hemisphere during the end of the last ice age,” said Joseph McConnell, Professor at the Desert Research Institute (DRI) in Nevada, US.

The Climate Change that began approximately 17,700 years ago included a sudden poleward shift in the westerly winds encircling Antarctica with corresponding changes in sea ice extent, ocean circulation and ventilation of the deep ocean.

Evidence of Climate Change like this is found in many parts of the Southern Hemisphere and in different paleoclimate archives, but what prompted these changes has remained largely unexplained.

“We postulate that these halogen-rich eruptions created a stratospheric ozone hole over Antarctica that, analogous to the modern ozone hole, led to large-scale changes in atmospheric circulation and hydro climate throughout the Southern Hemisphere,” McConnell said.

Furthermore, the fallout from these eruptions – containing elevated levels of hydrofluoric acid and toxic heavy metals – extended at least 2,800 kilometers from Mt. Takahe and likely reached southern South America.

For the study, McConnell’s ice core laboratory enabled high-resolution measurements of ice cores extracted from remote regions of the Earth, such as Greenland and Antarctica.

One such ice core, known as the West Antarctic Ice Sheet Divide (WAIS Divide) core was drilled to a depth of more than 3,405 meters, and much of it was analyzed in the Desert Research Institute Ultra-Trace Laboratory for more than 30 different elements and chemical species.

Additional analyses and modeling studies critical to support the authors’ findings were made by collaborating institutions around the US and the world.

“These precise, high-resolution records illustrate that the chemical anomaly observed in the WAIS Divide ice core was the result of a series of eruptions of Mt. Takahe located 350 kilometers to the north,” Monica Arienzo, Assistant Research Professor at DRI, said. (IANS)

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U.S. Sponsored Event Promoting Fossil Fuels Disrupted by Protesters

The conference, in Katowice, Poland, aims to work out the rules for implementing the Paris Agreement, the global pact on combating climate change.

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Fossil Fuels
Youth and indigenous groups protest against fossil fuels during US-hosted event at the UN climate talks in Katowice, Poland, Dec. 10, 2018, as the COP24 UN Climate Change Conference takes place in the city. VOA

Protesters disturbed a U.S.-sponsored event promoting fossil fuels on the sidelines of U.N. climate change talks on Monday.

The event called “U.S. innovative technologies spur economic dynamism,” touting the benefits of burning fossil fuels more efficiently, infuriated campaigners and many government delegations who want the talks to focus on moving away from coal, oil and gas.

Some 100 protestors in the audience at the event seized a microphone and interrupted opening remarks by Wells Griffith, the man President Donald Trump appointed as senior director for energy at the National Security Council.

fossil fuels
Representational Image Of Fossil Fuel plant.Wikimedia Commons.

They waved banners and chanted: “keep it in the ground.”

“I’m 19 years old and I’m pissed,” shouted Vic Barrett, a plaintiff in the “Juliana vs U.S.” lawsuit filed in 2015 by 21 young people against the government for allowing activities that harm the climate.

“I am currently suing my government for perpetuating the global climate change crisis… Young people are at the forefront of leading solutions to address the climate crises and we won’t back down.”

Before the interruption, Griffiths said it was important to be pragmatic in dealing with climate change in a world still heavily reliant on fossil fuels.

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Firefighters battle a wildfire as it threatens to jump a street near Oroville, California. VOA

“Alarmism should not silence realism… This administration does not see the benefit of being part of an agreement which impedes U.S. economic growth and jobs,” he said.

Also Read: Climate Change Left Its Fingerprint On The Most Extreme Disasters in 2017

The conference, in Katowice, Poland, aims to work out the rules for implementing the Paris Agreement, the global pact on combating climate change.

The United States, the world’s top oil and gas producer, is the only country to have announced its withdrawal from the accord. (VOA)