So concludes a scientist who reviewed five published studies of present-day global volcanic carbon dioxide emissions and compared those emissions to anthropogenic (human-induced) carbon dioxide output.
"The most frequent question that I have gotten (and still get), in my 30 some years as a volcanic gas geochemist from the general public and from geoscientists working in fields outside of volcanology, is 'Do volcanoes emit more carbon dioxide than human activities?'" says Terrance Gerlach of the U.S. Geological Survey. "Research findings indicate unequivocally that the answer to this question is 'No'--anthropogenic carbon dioxide emissions dwarf global volcanic carbon dioxide emissions."
This is one of the messages detailed in a new article by Gerlach published today in Eos, the weekly newspaper of the Earth and space sciences. The article is publicly available for download at http://www.agu.org/pubs/pdf/2011EO240001.pdf . Eos is a publication of the American Geophysical Union.
The studies reviewed by Gerlach give a range of results for volcanic carbon dioxide emissions, from a minimum of about one tenth of a billion to a maximum of about half a billion metric tons of carbon dioxide per year. Gerlach used the figure of about one- quarter of a billion metric tons of volcanic carbon dioxide per year to make his comparisons. The published projected anthropogenic carbon dioxide emission rate for 2010 is about 35 billion metric tons per year. (In U.S. tons --i.e., "short" tons--, the above figures are approximately 10 percent greater.)
Gerlach's calculations suggest present-day annual anthropogenic carbon dioxide emissions may exceed the carbon dioxide output of one or more supereruptions. As he notes in the Eos article, "Supereruptions are extremely rare, with recurrence intervals of 100,000-200,000 years; none have occurred historically, the most recent examples being the Toba eruption 74,000 years ago in Indonesia and the Yellowstone caldera eruption in the United States 2 million years ago."
Although geoscientists continue in their efforts to improve estimates and reduce uncertainties about how much carbon dioxide is released from mid-ocean ridges, from volcanic arcs, and from hot spot volcanoes, agreement exists among volcanic gas scientists regarding the significantly smaller emissions of volcanic carbon dioxide compared to anthropogenic carbon dioxide.
Peter Weiss | American Geophysical Union
PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target
22.05.2018 | Mercator Research Institute on Global Commons and Climate Change (MCC) gGmbH
Monitoring lava lake levels in Congo volcano
16.05.2018 | Seismological Society of America
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
22.05.2018 | Life Sciences
22.05.2018 | Earth Sciences
22.05.2018 | Trade Fair News