Jökull - 01.01.2020, Síða 7

Hannesdóttir et al.
Table 1: Glacier name, GLIMS ID, elevation span and area range for the ice caps, intermediate-size glaciers and small
glaciers (< 3 km2) for different regions in Iceland. All glaciers in Tröllaskagi are included in the small-glaciers group al-
though a few of them are in the intermediate-size category in terms of their size. *The LIA maximum of Drangajökull is
dated to 1850. – Nafn jökuls, GLIMS auðkenni, hæðarbil og flatarmálsbil jöklanna. Allir jöklar á Tröllaskaga eru flokkaðir
með litlum jöklum, þó að nokkrir þeirra séu stærri en 3 km2. Drangajökull náði mestri útbreiðslu á litlu ísöld um 1850.
Elevation span Area range
Glacier GLIMS-ID (m a.s.l.) (∼1890–2019, km2)
Main ice caps
Vatnajökull G343222E64409N 0–2100 8789–7720
Langjökull G339764E64629N 400–1400 1093–836
Hofsjökull G341164E64838N 600–1800 1038–810
Mýrdalsjökull G340925E63656N 100–1500 736–520
Drangajökull G337738E66173N 100–900 270*–137
Eyjafjallajökull G340399E63622N 200–1700 116–66
Intermediate-size glaciers (< 40 km2)
Tungnafellsjökull G342097E64755N 950–1500 49–32
Þórisjökull G339290E64537N 700–1300 44–23.8
Eiríksjökull G339601E64772N 1000–1500 37–20.5
Þrándarjökull G345090E64698N 950–1200 35–14.2
Tindfjallajökull G340403E63790N 1000–1450 22.6–12.4
Snæfellsjökull G336220E64811N 700–1450 25–8.8
Torfajökull G340991E63899N 850–1200 22.8–8.1
Hrútfellsjökull G340262E64742N 700–1400 10.8–4.4
Hofsjökull eystri G344949E64616N 1000–1150 11.6–3.1
Ok glacier G339116E64609N 1100–1200 10.3–0.07
Kaldaklofsjökull G340860E63893N 1000–1100 8–1.6
Snæfell (Tindsjökull) G344437E64800N 1200–1800 8–4.4
Small glaciers (< 3 km2)
Tröllaskagi glaciers – 700–1300 201–127
Flateyjarskagi glaciers – 500–1200 18.4–9.7
East Iceland glaciers – 650–1200 10.8–4.1
Southeast Iceland glaciers – 950–1200 12.6–4.5
Kerlingarfjöll glaciers – 1000–1450 13.6–1.7
Vestfirðir glaciers – 400–850 5.5–0.6
South Iceland glaciers – 950–1400 2.5–0.5
West Iceland glaciers – 1000–1200 4.1–0.2
Total – 0–2100 12,594–10,371
Glacier surges are responsible for a large propor-
tion of the total mass transport by the larger outlet
glaciers of the main ice caps. Up to 75% of the area
of the Vatnajökull ice cap has been affected by surges,
and many outlet glaciers have a history of regular
surges (Björnsson et al., 2003). For the 20th century
as a whole, surges contributed at least 10% to the to-
tal ice transport to the ablation areas of Vatnajökull
(Björnsson et al., 2003). Typical advances are in the
range of ∼0.3–2 km, with the exception of the 10 km
advance of Brúarjökull during the surges in 1890 and
in 1963–1964 (Þórarinsson, 1969). The timing and
duration of recorded surges that have caused advances
of the glacier terminus are summarized in Björnsson
et al. (2003).
4 JÖKULL No. 70, 2020