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Registration & Abstracts due
  Friday 24 April 2015

STATUS – Abstract submission will be open through 24 April:

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Presentation title: Title with capitalization only where appropriate.

Authors: 1st-author-Last-name, 1st-author-First name (affiliation-number, additional-affiliation-number); 2nd-author-Last-name, 2nd-author-First name (affiliation-number, additional-affiliation-number); … Nth-author-Last-name, Nth-author-First name (affiliation-number, additional-affiliation-number).

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Presentation title: Late glacial and early Holocene palaeoclimatic reconstruction based on glacier fluctuations and equilibrium-line altitudes at northern Folgefonna, Hardanger, western Norway.

Authors: Nordmann, Ola (1,2); Nordmann, Kari (3,2).

Affiliations: 1 Department of Earth Science, University of Bergen, 2 Bjerknes Centre for Climate Research, 3 Department of Geography, University of Bergen.


Abstract text: Northern Folgefonna (c. 23 km2), is a nearly circular maritime ice cap located on the Folgefonna Peninsula in Hardanger, western Norway. By combining the position of marginal moraines with AMS radiocarbon dated glacier-meltwater induced sediments in proglacial lakes draining northern Folgefonna, a continuous high-resolution record of variations in glacier size and equilibrium-line altitudes (ELAs) during the Lateglacial and early Holocene has been obtained. After the termination of the Younger Dryas (c. 11 500 cal. yr BP), a short-lived (100–150 years) climatically induced glacier readvance termed the ‘Jondal Event 1’ occurred within the ‘Preboreal Oscillation’ (PBO) c. 11 100 cal. yr BP. Bracketed to 10 550–10 450 cal. yr BP, a second glacier readvance is named the ‘Jondal Event 2’. A third readvance occurred about 10 000 cal. yr BP and corresponds with the ‘Erdalen Event 1’ recorded at Jostedalsbreen.

An exponential relationship between mean solid winter precipitation and ablation-season temperature at the ELA of Norwegian glaciers is used to reconstruct former variations in winter precipitation based on the corresponding ELA and an independent proxy for summer temperature. Compared to the present, the Younger Dryas was much colder and drier, the ‘Jondal Event 1’/PBO was colder and somewhat drier, and the ‘Jondal Event 2’ was much wetter. The ‘Erdalen Event 1’ started as rather dry and terminated as somewhat wetter. Variations in glacier magnitude/ELAs and corresponding palaeoclimatic reconstructions at northern Folgefonna suggest that low-altitude cirque glaciers (lowest altitude of marginal moraines 290 m) in the area existed for the last time during the Younger Dryas. These low-altitude cirque glaciers of suggested Younger Dryas age do not fit into the previous reconstructions of the Younger Dryas ice sheet in Hardanger.



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