Search results
Results From The WOW.Com Content Network
Sulphur dioxide (SO 2) absorbs strongly in the ultraviolet wavelengths and has low background concentrations in the atmosphere. These characteristics make sulphur dioxide a good target for volcanic gas monitoring. It can be detected by satellite-based instruments, which allow for global monitoring, and by ground-based instruments such as DOAS.
The eruption was one of the most powerful of the 19th century, spewing so much sulfur dioxide into the stratosphere that annual average temperatures in the Northern Hemisphere dropped by about one ...
The effects of volcanic eruptions containing sulfur dioxide aerosols on the ozone layer are complex, however. In the absence of anthropogenic or biogenic halogenated compounds in the lower stratosphere, depletion of dinitrogen pentoxide in the middle stratosphere associated with its reactivity to the aerosols can promote ozone formation. [ 69 ]
The USGS said the primary concern is high levels of volcanic gas – primarily water vapor, carbon dioxide and sulfur dioxide – that could have "far-reaching effects down-wind."
A volcanic eruption is essentially the only natural way for short-lived – less than a few years – gases like sulfur dioxide and water vapor to make it into the stratosphere.
The 2014–2015 eruption of Bárðarbunga was a Hawaiian eruption in the Bárðarbunga volcanic system in Iceland, that began on 29 August 2014, and ended on 27 February 2015. The eruption emitted large volumes of sulphur dioxide and impacted air quality in Iceland.
an estimated 10–120 million tons of sulfur dioxide were emitted, produced the "Year Without a Summer" [23] 1808 ice core event: Unknown eruption near equator, magnitude roughly half Tambora: Emission of sulfur dioxide around the amount of the 1815 Tambora eruption (ice cores from Antarctica and Greenland). [24] 1808
Measurements of sulfur dioxide emissions showed a rapid increase from 500 t (550 short tons) per day by May 13 to 5,000 t (5,500 short tons) per day by May 28. [ 9 ] [ 8 ] This implied that there was a rising column of fresh magma beneath the volcano.