Rit (Vísindafélag Íslendinga) - 01.07.1931, Blaðsíða 28

28
Vík in Mýrdal, siíu-
ated on the coast
about 15 km. from the
southeastern margin
of Mýrdalsjökull. This
station will however
be fairly well repre-
sentative of the whole
southern side of the
glacier complex. In
fig. 16 curve A shows
the mean temperature
at Vík through the
year, while curve B
is the same tempera-
ture reduced to 1000
m. above sea level,
which is the approxi-
mate height of the firnlimit on the southern side of the
glacier. The latter curve passes through zero at the end of
May and the end of Sept. so that here the ablation period
will be fairly well represented by the four months ]une—Sept.
with a mean temperature of 2°,5—3°,o C. at the firnlimit.
From the northern side no meteorological data are avail-
áble, but here the summer temperature will be a good deal
higher on account of frequent föhn-winds from SE and less
cloudiness. The height of the firnlimit on the northern
side of Mýrdalsjökull is according to Thoroddsen about
1000 m.
The annual precipitation at Vík is the greatest hitherto
measured in Iceland, 2175 mm.
1. Fixing Marks and Individual Glaciers. On the
northern side I visited the glacier that comes from the
crater cirque. It is about three km. in length and one km. in
breadth. It is very steep, about 20 in the middle part while
the end of the tongue gradually slopes and spreads a little
out. At the western side and at the front an enormous