Images of the Eruption
AOPP Oxford observations of May 2011 Grimsvötn eruption
This page provides an overview of research performed within the Earth Observation Data Group (EODG) of the Atmospheric, Oceanic and Planetary Physics (AOPP) department at the University of Oxford, relating to the May 2011 eruption of the volcano at Grimsvötn in Iceland. This work is funded mainly through grants from the UK Natural Environment Research Council (NERC), including the NERC National Centre for Earth Observation (NCEO). The Grimsvotn volcano lies under the Vatnajokull glacier, about 120 miles, (200 kilometers) east of the capital, Rejkjavik. The volcano began erupting around 1900 GMT on May 21, 2011 for the first time since 2004. In less than an hour the cloud had reached an altitude of 11 kilometers (6.8 miles).
| False colour images from the AATSR instrument, showing the
presence of a significant volcanic ash cloud off the North-West
coast of Scotland at approximately 12:30 pm BST on the 24th of May
2011. Images from both views of AATSR are shown, with the left image
showing the nadir (i.e. vertically down) view and the right showing
the forward view (where the instrument looks towards the South at an
angle of approximately 55o). The forward view
provides more sensitivity to the semi-transparent ash cloud, making
it much more apparent.|
The images also indicate the region identified as ash by an automated detection algorithm developed by EODG, which is outlined in red. The densest part of the ash cloud has been identified, however there is some hint of thinner ash extending further West than the identified region.
If compared to the images from IASI above, the ash cloud can be seen to be associated with the SO2 plume seen near Scotland in the morning image, and other images show some ash associated with the region of enhanced SO2 seen to the North of Iceland. Credit Dr Gareth Thomas.
All data and plots on this site should be considered preliminary work. Please contact us before reproducing these images elsewhere, or if you have further questions.
© EODG, 2010 | Maintained by Don Grainger | Contact us | Last update 28/05/11 12:15