#IMC: September 14 - 18 2025

Rediscovery marks established by Johan Bernhard Rekstad around the turn of the 20th century to measure frontal variations of outlet glaciers from the Jostedalsbreen Ice Cap in western Norway

Assigned Session: FS 3.201: Treasures from the past: using archival information to quantify environmental change in mountains

Abstract ID: 3.9638 | Accepted as Talk | Talk/Oral | TBA | TBA

Atle Nesje (0)
Atle Nesje ((0) University of Bergen, Allégaten 41, 5007, Bergen, Vestland, NO)

(0) University of Bergen, Allégaten 41, 5007, Bergen, Vestland, NO

Categories: Monitoring
Keywords: Permanent marks, Johan Bernhard Rekstad, Jostedalsbreen Ice Cap, glacier-front measurements

Categories: Monitoring
Keywords: Permanent marks, Johan Bernhard Rekstad, Jostedalsbreen Ice Cap, glacier-front measurements

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Around the turn of the 20th century, the first state geologist at the Geological Survey of Norway, located in Kristiania (Oslo) at that time, Johan (also sometimes named John) Bernhard Rekstad (2 October 1852 – 1 April 1934) established permanent marks to be used for frontal measurements of outlet glaciers from the Jostedalsbreen Ice Cap. In total, he established 29 marks at 15 outlet glaciers from the Jostedalsbreen Ice Cap. The exact location of only a few of these marks have been known by still living local inhabitants and scientists. Therefore, the authors started a search for these marks some years ago, and at present (2025), 15 marks in front of 11 of the outlet glaciers have been found and documented by exact location (coordinates and altitude) and photos.

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