The Pinatubo ash cloud extended 35 kilometers into the atmosphere, cooling parts of the world by up to 0. Recent research has suggested that even small eruptions could be contributing to slower surface temperature rise in the last 15 years or so, compared to previous decades.
Satellite images suggest the Calbuco ash cloud has reached at least 14km, Dr Anja Schmidt , a researcher in volcanic impacts and hazards at the University of Leeds, tells Carbon Brief. Another important factor in whether a volcanic eruption influences climate is the amount of sulphur dioxide contained in the dust cloud.
And the quantities can be huge. Once in the stratosphere, fast-moving winds can quickly spread the ash cloud around the world, giving a local eruption a global impact.
Schmidt says right now, the priority is to ensure aviation safety by monitoring and predicting how the ash cloud disperses. Volcano eruptions can influence more than just temperature. Recent research suggests eruptions can affect the position of the Intertropical Convergence Zone ITCZ , a huge belt of low pressure that is the main source of rain for much of Africa.
Published scientific estimates of the global CO 2 emission rate for all degassing subaerial on land and submarine volcanoes lie in a range from 0. The gigaton projected anthropogenic CO 2 emission for is about 80 to times larger than the respective maximum and minimum annual global volcanic CO 2 emission estimates.
There is no question that very large volcanic eruptions can inject significant amounts of carbon dioxide into the atmosphere.
The eruption of Mount St. Helens vented approximately 10 million tons of CO 2 into the atmosphere in only 9 hours. However, it currently takes humanity only 2. While large explosive eruptions like this are rare and only occur globally every 10 years or so, humanity's emissions are ceaseless and increasing every year. There continues to be efforts to reduce uncertainties and improve estimates of present-day global volcanic CO 2 emissions, but there is little doubt among volcanic gas scientists that the anthropogenic CO 2 emissions dwarf global volcanic CO 2 emissions.
Skip to main content. Search Search. The authors. Any reuse without express permission from the copyright owner is prohibited. Iddris et al. Skip to content Preparation of the large balloon flight with aerosol payloads conducted during the KlAsh campaign on 20 May from Corroboree Northern Territory, Australia.
Credit: D. Original written by Daniel Strain. Note: Content may be edited for style and length. Science News. Lingering ash The discovery began with a chance observation: Members of the research team had been flying an unmanned aircraft near the site of the Mount Kelut eruption -- an event that covered large portions of Java in ash and drove people from their homes. Toon, Eric J. Jensen, Charles G. Bardeen, Michael J. Mills, Margaret A. Tolbert, Pengfei Yu, Sarah Woods.
Persisting volcanic ash particles impact stratospheric SO2 lifetime and aerosol optical properties. Nature Communications , ; 11 1 DOI:
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