Jökull - 01.06.2000, Page 9

Ground deformation at Katla
Figure 4. The top graph shows estimated variations in ice mass of the Mýrdalsjökull glacier (whole line), mea-
sured in meters of water equivalent over the entire surface of the glacier, and times of tilt observations at the
stations Kötlukriki and Jökulkvísl (vertical dotted lines). Solid circles show the estimated ice mass at times of
tilt observations. Bottom graph gives the observed variations of east component of ground tilt at the two tilt
stations. Note the correlation between observed east component of tilt at either tilt station and the estimated
mass of ice of the Mýrdalsjökull glacier (From Tryggvason, 1973). - Efri hluti myndarinnar sýnir áætlaða
breytingu á ísmagni Mýrdalsjökuls (heila línan), íjafiigildi vatns á öllu yfirborði jökulsins. Fylltir hringir sýna
áætlað ísmagn þegar hallamœlingar voru gerðar við jökuljaðarinn. Neðri hluti myndarinnar sýnir breytingar
á mældum halla til austurs í Kötlukrika og við Jökulkvísl. Nokkurt samræmi milli hallamœlinga og áœtlaðs
ísmagns bendir til að breytingar jökulfargs valdi mœldum hallabreytingum við jökuljaðarinn.
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