Jökull - 01.10.1998, Page 24

Jökull 30/31131 /32132/33133/34134/35 135/36136/37137/38138/39139/40140/41141/42142/43143/44144/45145/46146/47147/48148/49149/50150/51151/52152/53153/54 j 54/55155/56156/57157/58158/591
VI. HOFSJÖKULL
1. Blágnípujökull* -72 | -15 -90
2. Nauthagajökull* -73 1 -152 +10 -10 -26 -64 +34 -60 -8 -7 -19 -4 -9 -6 -4 -40 +86 -13 -27
3. Múlajökull, vcstur -22 -31 +10 -49 +24 +15 + 11 -18 -2 -23 +3 +62 +5 -28 -29 -37 -48
suður* -140 | -167 -50 -82 -22 -56 0 -35 0 -6 -49 -9 -54 +257 +24 -60 +26 -107 -10
4. Sátujökull, Lambahraun* -150 -30 -30
—„—, Eyþrðingahólar*
VII. LANGJÖKULL 1890-1934
1. Hagafellsjökull vestari, staður 1 -792 -160 -170 -290 -168 -168 -50 -250
—i,—, staður 2* -792 -160 -170 -290 -168 -168 -50 -250
2. Hagafcllsjökull eystri* -13504 -50 | -500 -250 -225 | -300 -500 -375
3. Jökulkrókur, 1932-1972* -41 | -40 | -131 | -50 | -125 | -205 -80 J -60 "j
—, 1972-*
VIII. HRÚTFELL
1. Norðurkinn, austur* -50 -20 -25 -56 -20 -25 -50 -45 -20
2. Norðurkinn, mið* -40 -10 -16 -29 -20 -15 -24 -34 -30 -30 -77 -3
3. Norðurkinn, vestur* -10 -35 -38 -8 -50 -15 -60 -40 -30 -30 -45 -21
4. Norðvesturjökull* -65 -18 -25 -25 -30 -20 -46 -45 -30 -70 -70 0
IX. KERLINGAFJÖLL
1. Loðmundarjökuil* -36 | -7 | -13 | -7 | -7 | -4 | -2 | -8 | -34 | -1 | +4 | -2 | +3
X. NORÐURLANDSJÖKLAR
1. Gljúfurárjökull* -46 | -68 | -25 | -23 | -6 | -21
2. Hálsjökull*
3. Tungnahryggsjökull* -75 | -107
1900-1975
4. Barkárdalsjökull* -300
6. Bægisárjökull J■ L
7. Grimslandsjökull
1 The variation of Leirufjarðarjökull between 1840 and 1931 is given
in Eyþórsson (1935). It was -1100 m between 1840 and 1886,
-220 mfrom 1886 to 1898,-1300 mfrom 1898 to 1913 and-630m
from 1913 to 1931.
2 The variation of Kaldalónsjökull between 1887 and 1931 is given in
Eyþórsson (1935).
GRÍMSL ANDS J ÖKULL
Grímslandsjökull is a cirque glacier in central
northern Iceland (Fig. 6). Surveying was started in
1993 by a teacher at a local secondary school.
GLACIER VARIATIONS
The measured variations of the glaciers in the data
set are tabulated in Table 2 and selected records are
shown in Figures 7-13. Each measurement location is
tabulated separately in cases when two or more loca-
tions on the same glacier tongue were monitored si-
multaneously. The table thus gives the original mea-
3 The variation of Reykjafjarðarjökull between 1850 and 1931 is
given in Eyþórsson (1935). It was -1500 between 1850 and 1914,
-650 m from 1914 to 1929 and -250 m from 1929 to 1931.
4 The retreat of Hagafellsjökull eystri between 1890 and 1934 is given
in Sigbjarnarson (1967). It was -115 m between 1890 and 1902 and
-635 m from 1902 to 1929 and -600 m from 1929 to 1934.
surements without averaging or interpretation.
Table 1 gives the measurement period and some
characteristics of each glacier and figures 2-6 show
location maps of the glaciers. Most measurement sites
are marked on the maps, except for sites which are
very close to each other and which are observed main-
ly in order to obtain more representative values for the
average variations over some part of a terminus.
Figures 7-13 show that most of the non-surging
glaciers retreated strongly during the early half of the
observation period from 1930 to 1995, followed by a
readvance or a slowing of the retreat after about 1970.
The records of surge-type glaciers, which are marked
with a superscripted 1 in Table 1, are dominated by
22
JÖKULL, No. 45, 1998