New annual report - Glaciological investigations in Norway in 2017
In a new report NVE presents results from measurements on Norwegian glaciers in 2017. The report describes measurements of glacier mass balance and glacier length changes. There is also information about measurement of glacier movement and ice thickness, jøkulhlaups and meteorological measurements at some glaciers, and the report describes measurements from the Svartisen Subglacial Observatory beneath Engabreen.
Mass balance investigations were performed on fifteen glaciers in Norway in 2017. The winter balance for five of the reference glaciers (those with a mass balance series back to at least 1981) was lower than the 1981-2010 average, and two were larger than average. Engabreen had the greatest relative winter balance with 142 % of the reference period and Gråsubreen had the lowest with 33 %. The summer balance was lower than the 1981-2010 average for six of the reference glaciers. Only Ålfotbreen had a greater than average summer balance with 105 %. Nigardsbreen had the lowest relative summer balance with 72 % of the reference period. Consequently, the annual balance was negative for four of the reference glaciers (Ålfotbreen, Storbreen, Hellstugubreen and Gråsubreen) and positive for three of the reference glaciers (Nigardsbreen, Rembesdalskåka and Engabreen).
Glacier length change
Glacier length changes were measured at 24 glaciers in southern Norway and 7 glaciers in northern Norway. Twenty-one of the glaciers had a decrease in length, nine were unchanged and one had a small advance. The largest retreats were observed at Nigardsbreen (54 m), an outlet from Jostedalsbreen ice cap, Gråfjellsbrea (43 m), an outlet from southern Folgefonna ice cap and Koppangsbreen (32 m), a valley glacier in Troms, northern Norway.
The report for 2017 can be down-loaded here.