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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Copernicus Publications
2018
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00007617 2023-05-15T16:09:30+02:00 Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment Möller, Rebecca Möller, Marco Kukla, Peter A. Schneider, Christoph 2018-01 electronic https://doi.org/10.5194/essd-10-53-2018 https://noa.gwlb.de/receive/cop_mods_00007617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007574/essd-10-53-2018.pdf https://essd.copernicus.org/articles/10/53/2018/essd-10-53-2018.pdf eng eng Copernicus Publications Earth System Science Data -- http://www.earth-syst-sci-data.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2475469 -- 1866-3516 https://doi.org/10.5194/essd-10-53-2018 https://noa.gwlb.de/receive/cop_mods_00007617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007574/essd-10-53-2018.pdf https://essd.copernicus.org/articles/10/53/2018/essd-10-53-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/essd-10-53-2018 2022-02-08T22:58:25Z 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 Niedersächsisches Online-Archiv NOA Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) Earth System Science Data 10 1 53 60 |
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English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Möller, Rebecca Möller, Marco Kukla, Peter A. Schneider, Christoph Modulation of glacier ablation by tephra coverage from Eyjafjallajökull and Grímsvötn volcanoes, Iceland: an automated field experiment |
topic_facet |
article Verlagsveröffentlichung |
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 |
Möller, Rebecca Möller, Marco Kukla, Peter A. Schneider, Christoph |
author_facet |
Möller, Rebecca Möller, Marco Kukla, Peter A. Schneider, Christoph |
author_sort |
Möller, Rebecca |
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://noa.gwlb.de/receive/cop_mods_00007617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007574/essd-10-53-2018.pdf https://essd.copernicus.org/articles/10/53/2018/essd-10-53-2018.pdf |
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_relation |
Earth System Science Data -- http://www.earth-syst-sci-data.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2475469 -- 1866-3516 https://doi.org/10.5194/essd-10-53-2018 https://noa.gwlb.de/receive/cop_mods_00007617 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00007574/essd-10-53-2018.pdf https://essd.copernicus.org/articles/10/53/2018/essd-10-53-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
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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1766405372877209600 |