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...
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ftdoajarticles:oai:doaj.org/article:0901d18ef6eb47aab2c1e5d579b21d62 2023-05-15T13:29:26+02:00 Estimating local surface glacier mass balance from migration of the 1918 Katla eruption tephra layer on Sléttjökull, southern Iceland Wilfried Hagg Christoph Mayer Ulrich Münzer Natalie Barbosa Hans-Martin Schuler Matthias Staudacher https://doi.org/10.1017/aog.2022.1 https://doaj.org/article/0901d18ef6eb47aab2c1e5d579b21d62 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0260305522000015/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2022.1 0260-3055 1727-5644 https://doaj.org/article/0901d18ef6eb47aab2c1e5d579b21d62 Annals of Glaciology, Pp 1-9 Glacier monitoring ice cap mass-balance reconstruction radio-echo sounding Meteorology. Climatology QC851-999 article ftdoajarticles https://doi.org/10.1017/aog.2022.1 2023-03-12T01:30:52Z 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. Article in Journal/Newspaper Annals of Glaciology glacier Hofsjökull Ice cap Iceland Mýrdalsjökull Directory of Open Access Journals: DOAJ Articles Katla ENVELOPE(-19.062,-19.062,63.631,63.631) Mýrdalsjökull ENVELOPE(-19.174,-19.174,63.643,63.643) Annals of Glaciology 1 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Glacier monitoring ice cap mass-balance reconstruction radio-echo sounding Meteorology. Climatology QC851-999 |
spellingShingle |
Glacier monitoring ice cap mass-balance reconstruction radio-echo sounding Meteorology. Climatology QC851-999 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 |
topic_facet |
Glacier monitoring ice cap mass-balance reconstruction radio-echo sounding Meteorology. Climatology QC851-999 |
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. |
format |
Article in Journal/Newspaper |
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 |
title |
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_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_sort |
estimating local surface glacier mass balance from migration of the 1918 katla eruption tephra layer on sléttjökull, southern iceland |
publisher |
Cambridge University Press |
url |
https://doi.org/10.1017/aog.2022.1 https://doaj.org/article/0901d18ef6eb47aab2c1e5d579b21d62 |
long_lat |
ENVELOPE(-19.062,-19.062,63.631,63.631) ENVELOPE(-19.174,-19.174,63.643,63.643) |
geographic |
Katla Mýrdalsjökull |
geographic_facet |
Katla Mýrdalsjökull |
genre |
Annals of Glaciology glacier Hofsjökull Ice cap Iceland Mýrdalsjökull |
genre_facet |
Annals of Glaciology glacier Hofsjökull Ice cap Iceland Mýrdalsjökull |
op_source |
Annals of Glaciology, Pp 1-9 |
op_relation |
https://www.cambridge.org/core/product/identifier/S0260305522000015/type/journal_article https://doaj.org/toc/0260-3055 https://doaj.org/toc/1727-5644 doi:10.1017/aog.2022.1 0260-3055 1727-5644 https://doaj.org/article/0901d18ef6eb47aab2c1e5d579b21d62 |
op_doi |
https://doi.org/10.1017/aog.2022.1 |
container_title |
Annals of Glaciology |
container_start_page |
1 |
op_container_end_page |
9 |
_version_ |
1766000629882290176 |