Recovery of sediment cores at site Janssand and the southern beach of Spiekeroog
Taxi to Janssand and water sampling
Short cores are recovered to obtain undisturbed surface samples
Deep into the subsurface of the tidal flat
Preparation for core recovery
The hardest part
Methane sampling and temperature measurements were done before leaving ...
... the rest was done till late in the lab
Back in the mud after a short night
The first attempt failed and the empty tube had to be recovered under sceptical inspection
Even though not all sediment was in the tube, there was enough left to be analysed back in the lab