The influence of vegetation cover on the grain-size distributions and thicknesses of two Icelandic tephra layers

Grain-size distributions and thicknesses of tephra layers are used to reconstruct characteristics, dynamics, hazards explosive volcanic eruptions, but the extent which preservation is influenced by depositional environments unclear. This paper analyses grain-size produced Eyjafjallajökull (2010) Grímsvötn (2011) eruptions. We collected 110 samples layer thickness measurements from 86 sites at two locations in southern Iceland. Areas different vegetation cover have varying capacities affect rates erosion, retain fallout, or capture remobilised tephra. The was somewhat coarser-grained thicker areas birch woodland than adjacent moss heath, no comparable differences were observed. spatial variability (over tens metres) median particle-size low, providing confidence that relatively few may be required fallout characteristics.