Jökull - 01.10.1998, Síða 17

mountain ridge and the eastem branch terminates in a
proglacial lake. It was monitored at three locations in
the period 1930-1979. Since 1980 the terminus has
been fluctuating in approximately the same position,
although it is thinning. It has not been accessible for
measurements since 1979 because of the lake. The
western branch, which is named Svínafellsjökull í
Hornafiröi, has been monitored since 1930 by local
farmers. In the earlier part of the period it was moni-
tored at three locations.
Hojfellsdalsjökull is a bifurcation from the outlet
glacier Lambatungnajökull. It was monitored at three
locations for a short period in the 1930s and 1940s.
The length along the centre line and the area are
therefore hard to define and are not stated in Table 1.
EyjabakkajökuU is a surge-type glacier which has
been monitored by sighting from a distance. The ad-
vance retreat record is therefore not reliable. The surge
period is about a 35 years, possibly quite irregular as
the glacier is composed of two branches, a valley
glacier from SE and an outlet glacier from the main ice
cap, both of which may be surge-type. The two
branches are separated by a distinct 10 km long medi-
al moraine. The eastem branch is 17 km along the cen-
tre line and drains 55 km2 with elevations in the range
680-1560 m a.s.l. The westem branch is 16 km along
the centre line and drains 50 km2 with elevations in the
range 680-1320 m a.s.l. (Bjömsson, 1988).
1: Skeiðarárjökull, vestur, Vatnajökli
------2: Skeiðarárjökull, austur I, Vatnajökli
------3: Skeiðarárjökull, austur III, Vatnajökli
------ 4: Skeiðarárjökull, austur IV, Vatnajökli
------ 5: Skeiðarárjökull, austur V, Vatnajökli
------6: Breiðamerkurjökull, Breiðam.fj., Öræfajökli
------ 7: Breiðamerkurjökull, Skáli, Vatnajökli
------- 8: Breiðamerkurjökull, Nýgræður, Vatnajökli
-------9: Breiðamerkurjökull, Stemma, Vatnajökli
-------10: Breiðamerkurjökull, Fellsfjall, Vatnajökli
------- 11: Brúarjökull, Vatnajökli
------- 12: Kverkjökull, Vatnajökli
-------13: Tungnaárjökull, Vatnajökli
------- 14: Síðujökull, staður 1, Vatnajökli
Fig. 11. Glacier variations of Skeiðarárjökull in Vatnajökull and of outlet glaciers on the northem and westem sides of Vatnajökull.
- Jöklabreytingar, Skeiðarárjökull og skriðjöklar í norður- og vesturhluta Vatnajökuls.
IOKULL, No. 45, 1998
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