The transport of the volcanic bromine monoxide plume emitted by the volcano Kasatochi during August 2008, as followed by the Global Ozone Monitoring Experiment-2 (GOME-2) instrument aboard MetOp-A. MetOp-A, developed by ESA and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), is Europe's first polar-orbiting satellite dedicated to operational meteorology.