Two such field campaigns were then carried out: the first one in March 2017 in the Bláfjöll area near Reykjavik (F1, Iceland,) and the second one in February 2018 in Sodankylä (F2, Finland). The sampling strategies followed during each campaign are presented in Figure 1. All the measurement sites had a seemingly homogeneous snowpack in terms of depth and density, smallsized sampling plots with very smooth topography (slope < 5º and low roughness) and a shallow to moderate snow depth (