Jökull - 01.01.2016, Blaðsíða 50
Orthorectified aerial photograph showing Torfajökull on 2nd of October, 1958, processed by Joaquín M. C.
Belart and Eyjólfur Magnússon. Almost no snow is remaining from the previous winter. A red dashed line
indicates the extent of the ice cap in 2011, based on a lidar survey (Jóhannesson et al., 2013). At the upper
right corner, the elevation change in 1958–2011 is shown, indicating general lowering of the ice cap, reaching
∼100 m in its northern part. – Upprétt loftmynd af Torfajökli tekin 2. október, 1958. Því næst allur snjór
frá vetrinum á undan er horfinn. Rauð brotalína sýnir legu jökuljaðarsins sumarið 2011 (Tómas Jóhannesson
og fl. 2013). Litmynd í hægra horni ofanverðu sýnir hæðarbreytingu jökulyfirborðs frá 1958 til 2011. Allur
jökullinn hefur lækkað, mest á honum norðanverðum, um 100 m. Reference: Jóhannesson, T., Björnsson,
H., E. Magnússon, S. Gudmundsson, F. Pálsson, O. Sigurdsson, T. Thorsteinsson and E. Berthier 2013. Ice-
volume changes, bias estimation of mass-balance measurements and changes in subglacial lakes derived by
lidar mapping of the surface of Icelandic glaciers. Ann. Glaciol. 54(63), 63–74, doi:10.3189/2013AoG63A422.
50 JÖKULL No. 66, 2016