In summer 2014 we went to collect the dGPS gear – but found most of it buried in old snow from the winter.
We also did an annual survey of the ice depth with the new ground penetrating radar.
Just added a new page collecting together most of the 4x4s we have used in Iceland
We have been analysing the time-lapse image sequences from the river camera. Mostly it recorded at 4-hour intervals, but for a couple of days in September 2012 it took pictures every minute – the sequence is shown here.
At about noon the river rises by a few centimetres. The change is hardly noticeable, but we can measure the level quite accurately with careful image analysis, and we can see it happening by watching the river start flowing over a rock in this video.
We would like to relate this to what is happening up on the glacier. One factor is when the sun falls on the ice, and we can work this out from a map of the terrain. Here we are using a digital elevation model from the ASTER instrument aboard the Terra satellite. (ASTER GDEM is a product of METI and NASA.) The animation shows sunlit areas on the glacier and surrounding mountains increasing as the sun rises on 25 September 2012.
We’re investigating the texture of till using CT scans. This shows successive sections through a sample.
The first step in the analysis is to extract the shapes of the clasts (rock fragments) embedded in the sample. These show up mainly as red in the sections above. The shape below is a clast about 3 mm long.
We are occasionally getting pictures from the camera set up on the moraine of the glacier.