Antarctic Ozone Depletion Caused By Volcano

Erebus Volcano and Ozone Depletion

“Erebus volcano eruptions are of the Strombolian type, which volcanic ejecta and gases are known to reach heights of 1–2 km above the volcano summit and, therefore, cannot directly reach the stratosphere (Boichu et al., 2010, 2011; Dibble et al., 2008). However, according to aircraft observations in 1989 at a height of 8 km over Antarctica, the detected aerosol particles were identified as volcanic ejecta of Erebus (Chuan, 1994). Together with HCl and H2SO4 high concentrations in the Antarctic stratosphere, it is indicative of delivery mechanisms of Erebus volcanic gases into the Antarctic stratosphere.

Erebus volcano gas emissions can ascend to the Antarctic stratosphere via high-latitude cyclones which are coupled to the stratospheric polar vortex in cold seasons.”

“Thus, for more than 40 years, Erebus volcano, which activity restarted in 1972, has been a natural source of chemical species destroying the Antarctic ozone. The extremely high Erebus volcanic activity in the early 1980s definitely made a major contribution to the increase of the ozone hole along with man-made chlorofluorocarbons. Regular observations of Erebus volcano gas emissions can help to predict the total ozone content dynamics and, therefore, the ozone hole area.”

 

http://www.sciencedirect.com/science/article/pii/S1352231015304246

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One Volcano = Up to Four Times As Much SO2 As All Of Europe

There is an AGW site called RealClimate (I’m not going to link to them). They have a post up mocking  the use of volcano’s as a source of CO2/SO2 etc compared to human sources.

I did a post a while back looking at the amount of SO2 produced by one volcano.

Here is another news snippet from the same period.

“The sulfur dioxide (SO2) emitted from the Holuhraun eruption has reached up to 60,000 tons per day and averaged close to 20,000 tons since it began. For comparison, all the SO2 pollution in Europe, from industries, energy production, traffic and house heating, etc., amounts to 14,000 tons per day.”

Admittedly this is unusual. But there are 3,000,000 undersea volcanoes.

And they could have pumped out a lot of CO2 in the past.

The climate-driven rise and fall of sea level during the past million years matches up with valleys and ridges on the seafloor, suggesting ice ages influence underwater volcanic eruptions, two new studies reveal. And because volcanic chains suture some 37,000 miles (59,500 kilometers) of ocean floor, the eruptions could pump out enough carbon dioxide gas to shift planetary temperatures, the study authors suggest.

“Surprisingly, the deep seafloor matters in the long-term climate cycle,” said Maya Tolstoy, lead author of one of the studies and a marine geophysicist at the Lamont-Doherty Earth Observatory in Palisades, New York.”

 

 

 

Pavlof Alaska Volcano Erupts

VOlcano_Alaska_Capture

A “massive” ash cloud that erupted from an Alaskan volcano disrupted flights operating on flight paths in the region on Monday, The Associated Press reports.

The ash cloud spewed from the Pavlof Volcano – one of the most-active in the state – that sits about 625 miles southwest of Anchorage.

http://www.wkyc.com/news/nation-now/volcano-ash-cloud-disrupts-flights-over-alaska/108262623