Scott D. Doiron, Gregg J.S. Bluth, Charles C. Schnetzler, Arlin J. Krueger, and Louis S. Walter
Eos Transactions AGU, 1991, 72, 489-498
The Cerro Hudson volcano in southern Chile (45.92S, 73.0W) emitted large ash and sulfur dioxide clouds on August 12-15, following several days of minor activity.
The SO2 clouds were observed suing (preliminary) near real-time data from the Total Ozone Mapping Spectrometer )TOMS) as they encircled the south polar region.
The injection of SO2 into the stratosphere essentially created a gigantic chemical tracer that could provide new insights into the wind patterns and seasonal circulation around the Antarctic region.