The development of jökulhlaups revealed with remote sensing
Eyjólfur Magnússon, Research Scientist at the Institute of Earth Sciences gives a lecture titled:The development of jökulhlaups revealed with remote sensing and field observations of glacier motion. Case study from the Grímsvötn jökulhlaups, Vatnajökull ice cap, in 2021 and 2022
Glacial lake outburst floods, or jökulhlaups, provide unique opportunities to study the mechanics of the subglacial hydraulic system. The spatially widespread and temporally varying impact of jökulhlaups on glacier surface motion gives insight into the coupling between the motion of glaciers and ice sheets and the underlying hydraulic system. In the talk I will present a unique data set of the motion of Skeiðarárjökull outlet glacier in Vatnajökull, during the Grímsvötn jökulhlaups in 2021 and 2022, deduced from SAR interferometry data obtained by the ICEYE satellites. This is further complimented by ice motion measurements from in-situ GNSS station and maps of elevation changes during the jökulhlaups, extracted from Pléiades optical satellite data.