Study Excerpt: "Ilyinskaya et al. recorded the first atmospheric gas emission rate measurements from Katla, one of Iceland’s largest active volcanoes. This massive ice-covered caldera, which last erupted a century ago, was previously assumed to be a relatively minor emitter of CO2, but the new results suggest otherwise...The results indicate that Katla emits 12–24 kilotons of CO2 per day, which is more than double previous estimates of the emission rate of CO2 from all volcanic and geothermal sources in Iceland combined (2.7–5.8 kilotons per day)"
"These findings suggest that subglacial volcanoes—the emissions of which have not been considered in much detail, historically—may be major emitters of carbon dioxide. Because of this, their contributions to the global volcanic CO2 budget may have been underestimated."
'An explosive eruption large enough to cause huge numbers of deaths, alter the climate and poison the atmosphere occurring by the end of the century...The ash cloud thrown out from this eruption reached more than 26 miles (43km) into the atmosphere and triggered temperature changes that led to widespread famine and epidemics. The summer following the Tambora eruption is known as 'the year without summer'.
'Eruptions through 1990s and 2000s have contributed to warming 'pause'
Global temperatures plateaued since 1998 after rapid warming in 1990s
The findings mean models predicting climate change need to be revised'
'Back to the drawing board again for climate models...A newly discovered mechanism for cooling the planet - potentially, according to its discoverers, more significant even than the well-known chilling effects of volcanic eruptions - has now been further investigated. The mechanism in question is the action of difficult-to-study atmospheric molecules known as 'Criegee intermediates'
'So while volcanoes certainly may cause a minor drop in global temperature, the claim of Richard Muller and the BEST folks that there are “abrupt dips that match the emissions of known explosive volcanic eruptions” is simply not true. There are abrupt dips, but they don't match up with the volcanic eruptions'