Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern Iceland
We use the apparent horizontal shift of an englacial tephra layer outcrop to calculate local glacier mass balance on Sléttjökull, a lobe of Mýrdalsjökull in Southern Iceland. For this approach, the dipping angle of the englacial tephra layer in the glacier upstream of the outcrop and the flow veloci...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Cambridge University Press
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| Series: | Annals of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0260305522000015/type/journal_article |
| _version_ | 1811155654921945088 |
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| author | Wilfried Hagg Christoph Mayer Ulrich Münzer Natalie Barbosa Hans-Martin Schuler Matthias Staudacher |
| author_facet | Wilfried Hagg Christoph Mayer Ulrich Münzer Natalie Barbosa Hans-Martin Schuler Matthias Staudacher |
| author_sort | Wilfried Hagg |
| collection | DOAJ |
| description | We use the apparent horizontal shift of an englacial tephra layer outcrop to calculate local glacier mass balance on Sléttjökull, a lobe of Mýrdalsjökull in Southern Iceland. For this approach, the dipping angle of the englacial tephra layer in the glacier upstream of the outcrop and the flow velocity of the ice need to be known. An earlier investigation was expanded by the application of ground-penetrating radar, detecting the depth of the tephra along tracks with a total length of 10 km. Interpolation between the tracks enables us to derive the dipping angle of the layer along several flow lines. Together with glacier surface velocities, determined from feature tracking, we are able to estimate the local surface mass balance from the horizontal displacement of the tephra outcrop using freely available satellite imagery without additional fieldwork. The earlier local balance series was extended to the period 2014/15 to 2019/20. Although the results for the individual profiles differ slightly from each other, they show the same temporal pattern and clear variations from year to year. The results are compared to traditional mass-balance data from Hofsjökull. The two series show a good agreement in their interannual variability. |
| first_indexed | 2024-04-10T04:37:04Z |
| format | Article |
| id | doaj.art-0901d18ef6eb47aab2c1e5d579b21d62 |
| institution | Directory Open Access Journal |
| issn | 0260-3055 1727-5644 |
| language | English |
| last_indexed | 2024-04-10T04:37:04Z |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Annals of Glaciology |
| spelling | doaj.art-0901d18ef6eb47aab2c1e5d579b21d622023-03-09T12:44:39ZengCambridge University PressAnnals of Glaciology0260-30551727-56441910.1017/aog.2022.1Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern IcelandWilfried Hagg0https://orcid.org/0000-0002-0554-1936Christoph Mayer1https://orcid.org/0000-0002-4226-4608Ulrich Münzer2Natalie Barbosa3Hans-Martin Schuler4Matthias Staudacher5Department of Geoinformatics, Munich University of Applied Sciences HM, Munich, GermanyGeodesy and Glaciology, Bavarian Academy of Sciences and Humanities, Munich, GermanyDepartment of Earth and Environmental Sciences, Geology Section, Ludwig-Maximilians-University, Munich, GermanyDepartment of Earth and Environmental Sciences, Faculty of Earth Sciences, GeoBio Center, Ludwig-Maximilians-University, Munich, GermanyIGM Ingenieurgesellschaft für Geophysikalische Messtechnik mbH, Überlingen, GermanyWasserwirtschaftsamt Traunstein, Traunstein, GermanyWe use the apparent horizontal shift of an englacial tephra layer outcrop to calculate local glacier mass balance on Sléttjökull, a lobe of Mýrdalsjökull in Southern Iceland. For this approach, the dipping angle of the englacial tephra layer in the glacier upstream of the outcrop and the flow velocity of the ice need to be known. An earlier investigation was expanded by the application of ground-penetrating radar, detecting the depth of the tephra along tracks with a total length of 10 km. Interpolation between the tracks enables us to derive the dipping angle of the layer along several flow lines. Together with glacier surface velocities, determined from feature tracking, we are able to estimate the local surface mass balance from the horizontal displacement of the tephra outcrop using freely available satellite imagery without additional fieldwork. The earlier local balance series was extended to the period 2014/15 to 2019/20. Although the results for the individual profiles differ slightly from each other, they show the same temporal pattern and clear variations from year to year. The results are compared to traditional mass-balance data from Hofsjökull. The two series show a good agreement in their interannual variability.https://www.cambridge.org/core/product/identifier/S0260305522000015/type/journal_articleGlacier monitoringice capmass-balance reconstructionradio-echo sounding |
| spellingShingle | Wilfried Hagg Christoph Mayer Ulrich Münzer Natalie Barbosa Hans-Martin Schuler Matthias Staudacher Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern Iceland Annals of Glaciology Glacier monitoring ice cap mass-balance reconstruction radio-echo sounding |
| title | Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern Iceland |
| title_full | Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern Iceland |
| title_fullStr | Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern Iceland |
| title_full_unstemmed | Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern Iceland |
| title_short | Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern Iceland |
| title_sort | estimating local surface glacier mass balance from migration of the 1918 katla eruption tephra layer on slettjokull southern iceland |
| topic | Glacier monitoring ice cap mass-balance reconstruction radio-echo sounding |
| url | https://www.cambridge.org/core/product/identifier/S0260305522000015/type/journal_article |
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