Volcanic ash can help reduce carbon dioxide associated with climate change

Volcanic ash can help reduce CO2 associated with climate change

Volcanic debris flow Avalanche at Souffrere Hills Volcano, Montserrat. Sincerely: Martin Palmer

Scientists at the University of Southampton investigated ways to remove carbon dioxide (CO)2) And other greenhouse gases from our atmosphere believe that volcanic ash may play an important role.

A team from the University’s School of Ocean and Earth Science has controlled the effect of spreading volcanic ash from an area of ​​the ocean floor to an area of ​​the ocean floor to enhance natural processes that shut down CO.2 In seabed. They found that the technique has the potential to be inexpensive, technically simple, and less invasive than other techniques to remove harmful gases.

Researcher’s findings have been published in the journal Anthropocene.

Human-based climate change is one of the most pressing topics in contemporary science and politics. The impact of hundreds of years of greenhouse gas emissions is becoming evident every year, including environmental changes including heatwaves, droughts, wildfires and other extreme weather events.

“As a result of overwhelming evidence, politicians have begun to take steps toward incorporating emission reductions into policies, such as in the 2015 Paris Agreement with their long-term goal of ensuring that global average temperatures exceed pre-industrial 2. Do not exceed degrees Celsius. Levels. However, it is becoming clear that active greenhouse gas removal (GGR) will be needed to avoid the worst effects of climate change, “co-authored the study and the University of Southampton Professor of Geochemistry, Martin Palmer explains.

GGR technology removes carbon dioxide and other gases from the atmosphere, reducing the greenhouse effect, and slowing climate change over the long term. There are several possible approaches for GGR to simplify, redistribution from complex to complex, such as actively removing CO.2 From the environment.

Most volcanoes are located close to the oceans, and every year millions of tons of volcanic ash fall into them and settle on the seashore. Once there, it increases carbon storage in marine sediments and reduces atmospheric CO2 Levels. This is important because oceans are the largest sink of man-made CO2 on the earth.

“One way the oceans shut down the C.O.2 It is stored as sediment on the ocean floor in the form of calcium carbonate and organic carbon. In our work, we discuss how this natural process can be artificially enhanced by adding ashes to the oceans, ”says lead author and former post-doctoral research assistant Jack Launman of the University of Southampton, who is now a professor at the institute Place. ” Chemistry and Biology Marine Environment (ICBM), Oldenburg University.

The scientists modeled the effect of distributing volcanic ash from a ship to an area of ​​the ocean. Results show that this method can be as large as 2300 tons of CO.2 50,000 tons of ash supplied at a cost of 50,000 tons per CO.2 Much cheaper than most other GGR methods. Furthermore, the approach is simply an extension of a naturally occurring process, does not involve expensive technology and does not require remodeling valuable agricultural land.

Scientists say more research is needed to test the efficiency of increased ash deposition in the oceans and to ensure that there are no further side effects, but early indications suggest that it may be used in many areas of the world. Can be applied easily and inexpensively.

How will the ocean carbon cycle evolve in the future? The purpose of the new project is to find out

more information:
Jack Longman et al., Viability of Greenhouse Gas Removal via Artificial Addition of Volcanic Ash to the Ocean, Anthropocene (2020). DOI: 10.1016 / j.ancene.2020.100264

Provided by the University of Southampton

Quotes: Volcanic ash can help reduce carbon dioxide associated with climate change (2020, 29 September). Retrieved 29 September 2020 from https://phys.org/news/2020-09-volcanic-ash-carbon-dioxide-climate.html.

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