One of the most striking features of runoff from Alpine glaciers in the summer is the large diurnal variation in discharge during the period after the snow cover on the lower glacier has been ablated (Fig. 3.1). Variations in discharge are inverse to those of electrical conductivity (EC) on a diurnal basis (Fig. 3.2), and over the ablation season as a whole (Fig. 3.3), although there is much scatter in the data. EC increases as the concentration of total solutes increases, although supplementary chemical measurements are required to determine the absolute composition of the...

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