Gravity effect of glacial ablation in the Eastern Alps – observation and modeling
Absolute gravity measurements have been regularly performed in the Austrian Eastern Alps since 1985. A gravity increase of 300 nm s−2 has been observed so far. The gravity trend is explained by ablation effects within surrounding glaciers. Ice thickness changes derived from 3 successive glacier inve...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00023095 2023-05-15T18:32:32+02:00 Gravity effect of glacial ablation in the Eastern Alps – observation and modeling Arneitz, P. Meurers, B. Ruess, D. Ullrich, C. Abermann, J. Kuhn, M. 2013-03 electronic https://doi.org/10.5194/tc-7-491-2013 https://noa.gwlb.de/receive/cop_mods_00023095 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023050/tc-7-491-2013.pdf https://tc.copernicus.org/articles/7/491/2013/tc-7-491-2013.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-491-2013 https://noa.gwlb.de/receive/cop_mods_00023095 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023050/tc-7-491-2013.pdf https://tc.copernicus.org/articles/7/491/2013/tc-7-491-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/tc-7-491-2013 2022-02-08T22:50:47Z Absolute gravity measurements have been regularly performed in the Austrian Eastern Alps since 1985. A gravity increase of 300 nm s−2 has been observed so far. The gravity trend is explained by ablation effects within surrounding glaciers. Ice thickness changes derived from 3 successive glacier inventories of 1969, 1997 and 2006 are used for quantitative 3-D modeling based on rectangular prisms with basis areas of ≤ 8 m × 8 m. Local topographic changes due to man-made mass displacements close to the measuring site are modeled by a polyhedron approach. Two-thirds (2/3) of the observed gravity increase can be explained by the ablation model response and man-made effects. A positive trend of about 100 nm s−2 remains. The origin of the residual trend remains open. Correcting for geodynamical processes like Alpine uplift or postglacial deformation is expected to cause a slight increase of this trend. The observed gravity signal shows seasonal gravity variations as well, which are probably due to snow cover effects but cannot be quantified due to the lack of appropriate snow cover information. Article in Journal/Newspaper The Cryosphere Niedersächsisches Online-Archiv NOA The Cryosphere 7 2 491 498 |
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article Verlagsveröffentlichung Arneitz, P. Meurers, B. Ruess, D. Ullrich, C. Abermann, J. Kuhn, M. Gravity effect of glacial ablation in the Eastern Alps – observation and modeling |
topic_facet |
article Verlagsveröffentlichung |
description |
Absolute gravity measurements have been regularly performed in the Austrian Eastern Alps since 1985. A gravity increase of 300 nm s−2 has been observed so far. The gravity trend is explained by ablation effects within surrounding glaciers. Ice thickness changes derived from 3 successive glacier inventories of 1969, 1997 and 2006 are used for quantitative 3-D modeling based on rectangular prisms with basis areas of ≤ 8 m × 8 m. Local topographic changes due to man-made mass displacements close to the measuring site are modeled by a polyhedron approach. Two-thirds (2/3) of the observed gravity increase can be explained by the ablation model response and man-made effects. A positive trend of about 100 nm s−2 remains. The origin of the residual trend remains open. Correcting for geodynamical processes like Alpine uplift or postglacial deformation is expected to cause a slight increase of this trend. The observed gravity signal shows seasonal gravity variations as well, which are probably due to snow cover effects but cannot be quantified due to the lack of appropriate snow cover information. |
format |
Article in Journal/Newspaper |
author |
Arneitz, P. Meurers, B. Ruess, D. Ullrich, C. Abermann, J. Kuhn, M. |
author_facet |
Arneitz, P. Meurers, B. Ruess, D. Ullrich, C. Abermann, J. Kuhn, M. |
author_sort |
Arneitz, P. |
title |
Gravity effect of glacial ablation in the Eastern Alps – observation and modeling |
title_short |
Gravity effect of glacial ablation in the Eastern Alps – observation and modeling |
title_full |
Gravity effect of glacial ablation in the Eastern Alps – observation and modeling |
title_fullStr |
Gravity effect of glacial ablation in the Eastern Alps – observation and modeling |
title_full_unstemmed |
Gravity effect of glacial ablation in the Eastern Alps – observation and modeling |
title_sort |
gravity effect of glacial ablation in the eastern alps – observation and modeling |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-491-2013 https://noa.gwlb.de/receive/cop_mods_00023095 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023050/tc-7-491-2013.pdf https://tc.copernicus.org/articles/7/491/2013/tc-7-491-2013.pdf |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-491-2013 https://noa.gwlb.de/receive/cop_mods_00023095 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00023050/tc-7-491-2013.pdf https://tc.copernicus.org/articles/7/491/2013/tc-7-491-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-7-491-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
2 |
container_start_page |
491 |
op_container_end_page |
498 |
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1766216695768154112 |