We discovered that Katla volcano in Iceland is a globally important source of atmospheric carbon dioxide (CO2) in spite of being previously assumed to be a minor gas emitter. Volcanoes are a key natural source of atmospheric CO2 but estimates of the total global amount of CO2 that volcanoes emit are based on only a small number of active volcanoes. Very few volcanoes which are covered by glacial ice have been measured for gas emissions, probably because they tend to be difficult to access and often do not have obvious degassing vents. Through high‐precision airborne measurements and atmospheric dispersion modeling, we show that Katla, a highly hazardous subglacial volcano which last erupted 100 years ago, is one of the largest volcanic sources of CO2 on Earth, releasing up to 5% of total global volcanic emissions
Iceland’s Katla volcano [image credit: icelandmonitor]
Precision measurements show that sub-glacial volcanoes have been greatly underestimated as an ongoing source of carbon dioxide emissions. When will they re-do the calculations?
H/T Warwick Hughes
Recent research suggests the volume of volcanic CO2 being emitted into the atmosphere is far greater than previously thought, challenging man-made warming, says ClimateChangeDispatch.
The cornerstone principle of the global warming theory, anthropogenic global warming (AGW), is built on the premise that significant increases of modern era human-induced CO2 emissions have acted to unnaturally warm Earth’s atmosphere.
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