below). The discharge in Markarfljót was only low to average during the period of glacial melt. The drainage area on northwestern Mýrdalsjökull ice cap was covered with a thick layer of ash, which likely acted as an
insulator. Precipitation is a pronounced factor in Markarfljót.
Low precipitation
Haffjarðará
Figure 4. Discharge from Haffjarðará from mid May through August.
Haffjarðará
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