Volcano’s Toxic Plume Returns as Stealth Hazard
During a closely watched eruption, plumes of harmful sulfur dioxide gas morphed into “plumerangs” of sulfuric-acid-rich aerosols that descended on populated parts of Iceland.
Holuhraun eruption
By JoAnna Wendel 20 July 2017
Toxic airborne emissions from volcanoes in Iceland may be dangerous even when pollution-monitoring instruments indicate that the air is safe, according to a new study. Volcanologists observing a 2014–2015 eruption in Iceland have found that even when air quality detectors had determined that sulfur dioxide (SO2) gas had fallen to acceptable levels in the air downwind from an eruption, another form of contamination known as sulfate aerosols had sneaked back, sullying the air.
https://eos.org/articles/volcanos-toxic-plume-returns-as-stealth-hazard
