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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
  • 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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EU Countries Consume Earth’s Resources Faster than they can be Renewed: Report

Some 100 Greenpeace activists and students from several European countries marched through Sibiu carrying a huge banner saying "Broken Climate Broken Future"

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France's President Emmanuel Macron, right, and President of the European Commission Jean-Claude Juncker speak during the informal meeting of European Union leaders in Sibiu, Romania, May 9, 2019. VOA

The European Union’s 28 countries consume the Earth’s resources faster than they can be renewed and none of them has sustainable consumption policies, a report released Thursday said, as EU leaders met to discuss priorities for the next five years.

“All EU countries are living beyond the means of our planet. The EU and its citizens are currently using twice more than the EU ecosystems can renew,” the report by the World Wide Fund (WWF) and Global Footprint Network said. It was issued as leaders met in the Romanian city of Sibiu to set the course for the bloc after Britain’s planned departure from the EU.

Climate change key priority

French President Emmanuel Macron said before the summit that climate change was among his key priorities and it was included in the bloc’s 10 “commitments” for the future until 2024, agreed by all the 27 leaders meeting in Sibiu.

earth's resources
The European Union’s 28 countries consume the Earth’s resources faster than they can be renewed and none of them has sustainable consumption policies. Pixabay

But the bloc is divided on how to achieve any ambitious climate goals and it remains far from clear how the Sibiu declaration would be implemented. Some 100 Greenpeace activists and students from several European countries marched through Sibiu carrying a huge banner saying “Broken Climate Broken Future.”

“We cannot talk about a prosperous future without a healthy climate,” Greenpeace climate activist Alin Tanase told Reuters. Views on concrete action to be taken to combat climate change differ between EU countries, influenced greatly by their dominant industries, such as carmakers in Germany or the coal industry in Poland.

Tusk sensitive to climate change

The chairman of the summit, President of the European Council Donald Tusk, said there was no future for politicians who were not sensitive to climate change and environment protection issues.

“The young generation is much more united on this than the member states. The truth is that nothing has changed when it comes to this divide and different opinions about this. What is new is this very fresh and energetic pressure,” he told a news conference after the summit.

climate change, earth's resources
Some 100 Greenpeace activists and students from several European countries marched through Sibiu carrying a huge banner saying “Broken Climate Broken Future.” VOA

Climate protection and sustainable development is also an important topic in the election campaign for the May 23-26 European Parliament elections, which will influence the leadership of European institutions and their programs.

The European Commission has been pushing for the EU to become climate neutral by 2050 through reducing carbon emissions that will otherwise boost the Earth’s average temperatures with devastating consequences.

“The EU uses up almost 20 percent of the Earth’s bio-capacity although it comprises only 7 percent of the world population,” the WWF report said. “In other words, 2.8 planets would be needed if everyone consumed at the rate of the average EU resident,” it said.

climate change, earth's resources
FILE – Climate change demonstrators hold banners in front of the Winston Churchill Statue during a protest near Parliament in London, April 12, 2019. VOA

ALSO READ: Billionaire Jeff Bezos Reveals Mockup of Lunar Lander, Embraces Trump’s Moon Timetable

Luxembourg smallest but fastest

It said the EU’s smallest and richest country, Luxembourg, was also the one which used up renewable resources the fastest last year. Just 46 days into the year, it had consumed its full share of the Earth’s resources, it said.

The EU’s poorest nation, Romania, took the longest to arrive at that point, on July 12th. But that was still earlier than the world’s average of Aug. 1, called Earth overshoot day. (VOA)