Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment
We report results from a field experiment investigating the influence of volcanic tephra coverage on glacier ablation. These influences are known to be significantly different from those of moraine debris on glaciers due to the contrasting grain size distribution and thermal conductivity. Thus far,...
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ftdoajarticles:oai:doaj.org/article:ef07cb3d4a9a42fda0f0e3da1cc1714f 2023-05-15T16:09:30+02:00 Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment R. Möller M. Möller P. A. Kukla C. Schneider 2018-01-01T00:00:00Z https://doi.org/10.5194/essd-10-53-2018 https://doaj.org/article/ef07cb3d4a9a42fda0f0e3da1cc1714f EN eng Copernicus Publications https://www.earth-syst-sci-data.net/10/53/2018/essd-10-53-2018.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-10-53-2018 1866-3508 1866-3516 https://doaj.org/article/ef07cb3d4a9a42fda0f0e3da1cc1714f Earth System Science Data, Vol 10, Pp 53-60 (2018) Environmental sciences GE1-350 Geology QE1-996.5 article 2018 ftdoajarticles https://doi.org/10.5194/essd-10-53-2018 2022-12-31T14:28:45Z We report results from a field experiment investigating the influence of volcanic tephra coverage on glacier ablation. These influences are known to be significantly different from those of moraine debris on glaciers due to the contrasting grain size distribution and thermal conductivity. Thus far, the influences of tephra deposits on glacier ablation have rarely been studied. For the experiment, artificial plots of two different tephra types from Eyjafjallajökull and Grímsvötn volcanoes were installed on a snow-covered glacier surface of Vatnajökull ice cap, Iceland. Snow-surface lowering and atmospheric conditions were monitored in summer 2015 and compared to a tephra-free reference site. For each of the two volcanic tephra types, three plots of variable thickness ( ∼ 1.5, ∼ 8.5 and ∼ 80 mm) were monitored. After limiting the records to a period of reliable measurements, a 50-day data set of hourly records was obtained, which can be downloaded from the Pangaea data repository ( https://www.pangaea.de doi:10.1594/PANGAEA.876656). The experiment shows a substantial increase in snow-surface lowering rates under the ∼ 1.5 and ∼ 8.5 mm tephra plots when compared to uncovered conditions. Under the thick tephra cover some insulating effects could be observed. These results are in contrast to other studies which depicted insulating effects for much thinner tephra coverage on bare-ice glacier surfaces. Differences between the influences of the two different petrological types of tephra exist but are negligible compared to the effect of tephra coverage overall. Article in Journal/Newspaper Eyjafjallajökull glacier Ice cap Iceland Vatnajökull Directory of Open Access Journals: DOAJ Articles Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) Earth System Science Data 10 1 53 60 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 R. Möller M. Möller P. A. Kukla C. Schneider Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
We report results from a field experiment investigating the influence of volcanic tephra coverage on glacier ablation. These influences are known to be significantly different from those of moraine debris on glaciers due to the contrasting grain size distribution and thermal conductivity. Thus far, the influences of tephra deposits on glacier ablation have rarely been studied. For the experiment, artificial plots of two different tephra types from Eyjafjallajökull and Grímsvötn volcanoes were installed on a snow-covered glacier surface of Vatnajökull ice cap, Iceland. Snow-surface lowering and atmospheric conditions were monitored in summer 2015 and compared to a tephra-free reference site. For each of the two volcanic tephra types, three plots of variable thickness ( ∼ 1.5, ∼ 8.5 and ∼ 80 mm) were monitored. After limiting the records to a period of reliable measurements, a 50-day data set of hourly records was obtained, which can be downloaded from the Pangaea data repository ( https://www.pangaea.de doi:10.1594/PANGAEA.876656). The experiment shows a substantial increase in snow-surface lowering rates under the ∼ 1.5 and ∼ 8.5 mm tephra plots when compared to uncovered conditions. Under the thick tephra cover some insulating effects could be observed. These results are in contrast to other studies which depicted insulating effects for much thinner tephra coverage on bare-ice glacier surfaces. Differences between the influences of the two different petrological types of tephra exist but are negligible compared to the effect of tephra coverage overall. |
format |
Article in Journal/Newspaper |
author |
R. Möller M. Möller P. A. Kukla C. Schneider |
author_facet |
R. Möller M. Möller P. A. Kukla C. Schneider |
author_sort |
R. Möller |
title |
Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment |
title_short |
Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment |
title_full |
Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment |
title_fullStr |
Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment |
title_full_unstemmed |
Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment |
title_sort |
modulation of glacier ablation by tephra coverage from eyjafjallajökull and grímsvötn volcanoes, iceland: an automated field experiment |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/essd-10-53-2018 https://doaj.org/article/ef07cb3d4a9a42fda0f0e3da1cc1714f |
long_lat |
ENVELOPE(-16.823,-16.823,64.420,64.420) |
geographic |
Vatnajökull |
geographic_facet |
Vatnajökull |
genre |
Eyjafjallajökull glacier Ice cap Iceland Vatnajökull |
genre_facet |
Eyjafjallajökull glacier Ice cap Iceland Vatnajökull |
op_source |
Earth System Science Data, Vol 10, Pp 53-60 (2018) |
op_relation |
https://www.earth-syst-sci-data.net/10/53/2018/essd-10-53-2018.pdf https://doaj.org/toc/1866-3508 https://doaj.org/toc/1866-3516 doi:10.5194/essd-10-53-2018 1866-3508 1866-3516 https://doaj.org/article/ef07cb3d4a9a42fda0f0e3da1cc1714f |
op_doi |
https://doi.org/10.5194/essd-10-53-2018 |
container_title |
Earth System Science Data |
container_volume |
10 |
container_issue |
1 |
container_start_page |
53 |
op_container_end_page |
60 |
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1766405374100897792 |