Glacial and erosional contributions to Late Quaternary uplift of the European Alps (GEOLQUEA)
Isostatic adjustments of the Earth’s surface to changes in water, ice, and sediment loading are important contributions to present-day uplift/subsidence rates in many regions on Earth. In the absence of significant horizontal tectonic shortening in the central and western parts of the European Alps,...
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ftfuberlin:oai:refubium.fu-berlin.de:fub188/41360 2023-12-03T10:24:11+01:00 Glacial and erosional contributions to Late Quaternary uplift of the European Alps (GEOLQUEA) Scherler, Dirk Werner, Helen Winkelmann, Ricarda Jouvet, Guillaume Klemann, Volker 2023 1 S. application/pdf https://refubium.fu-berlin.de/handle/fub188/41360 https://doi.org/10.17169/refubium-41081 eng eng https://refubium.fu-berlin.de/handle/fub188/41360 http://dx.doi.org/10.17169/refubium-41081 https://creativecommons.org/licenses/by/4.0/ Ice sheet modelling Late Quaternary uplift European Alps ddc:550 doc-type:Other 2023 ftfuberlin https://doi.org/10.17169/refubium-41081 2023-11-05T23:25:25Z Isostatic adjustments of the Earth’s surface to changes in water, ice, and sediment loading are important contributions to present-day uplift/subsidence rates in many regions on Earth. In the absence of significant horizontal tectonic shortening in the central and western parts of the European Alps, uplift rates larger than 2 mm/yr are difficult to explain by geodynamic processes and have been a matter of debate for many decades. Here we examine the likely contribution of glacial isostatic adjustment in the European Alps in response to changes in ice loading using state of the art ice flow and lithospheric numerical modeling. In contrast to a similar previous approach (Mey et al., 2016), we employ a transient ice sheet model over the last glacial cycle (100 kyr) in combination with a spherical viscoelastic solid earth model. We present ice model results using the Instructed Glacier Model (Jouvet et al., 2021), in which we tested the effect of spatial resolution on the growth and extent of the European ice cap. We found significant differences using a model resolution of 200 m compared to a resolution of 2000 m, which is commonly used in large-scale glacier modeling studies. These differences result in near-steady state volumetric differences at the maximum ice extent of +13% for the high compared to the low-resolution model. In addition, we observed periods of marked ice growth that initiated at significantly different times for the different resolution models. Therefore, we conclude that a realistic ice loading history requires a sufficiently high spatial resolution, which is significantly higher than used in previous models. Based on the modeled ice loading histories, we used the lithosphere and mantle model VILMA (Klemann et al., 2008, J. Geodyn.) to predict the vertical land motion. These estimates are based on a global 60 km thick elastic lithosphere, followed by a 200 km thick viscous layer with a viscosity of 1020 Pa s, which increases to 5 x 1020 Pa s down to 670 km depth, and 3.16 x 1021 Pa s to the ... Other/Unknown Material Ice cap Ice Sheet Freie Universität Berlin: Refubium (FU Berlin) |
institution |
Open Polar |
collection |
Freie Universität Berlin: Refubium (FU Berlin) |
op_collection_id |
ftfuberlin |
language |
English |
topic |
Ice sheet modelling Late Quaternary uplift European Alps ddc:550 |
spellingShingle |
Ice sheet modelling Late Quaternary uplift European Alps ddc:550 Scherler, Dirk Werner, Helen Winkelmann, Ricarda Jouvet, Guillaume Klemann, Volker Glacial and erosional contributions to Late Quaternary uplift of the European Alps (GEOLQUEA) |
topic_facet |
Ice sheet modelling Late Quaternary uplift European Alps ddc:550 |
description |
Isostatic adjustments of the Earth’s surface to changes in water, ice, and sediment loading are important contributions to present-day uplift/subsidence rates in many regions on Earth. In the absence of significant horizontal tectonic shortening in the central and western parts of the European Alps, uplift rates larger than 2 mm/yr are difficult to explain by geodynamic processes and have been a matter of debate for many decades. Here we examine the likely contribution of glacial isostatic adjustment in the European Alps in response to changes in ice loading using state of the art ice flow and lithospheric numerical modeling. In contrast to a similar previous approach (Mey et al., 2016), we employ a transient ice sheet model over the last glacial cycle (100 kyr) in combination with a spherical viscoelastic solid earth model. We present ice model results using the Instructed Glacier Model (Jouvet et al., 2021), in which we tested the effect of spatial resolution on the growth and extent of the European ice cap. We found significant differences using a model resolution of 200 m compared to a resolution of 2000 m, which is commonly used in large-scale glacier modeling studies. These differences result in near-steady state volumetric differences at the maximum ice extent of +13% for the high compared to the low-resolution model. In addition, we observed periods of marked ice growth that initiated at significantly different times for the different resolution models. Therefore, we conclude that a realistic ice loading history requires a sufficiently high spatial resolution, which is significantly higher than used in previous models. Based on the modeled ice loading histories, we used the lithosphere and mantle model VILMA (Klemann et al., 2008, J. Geodyn.) to predict the vertical land motion. These estimates are based on a global 60 km thick elastic lithosphere, followed by a 200 km thick viscous layer with a viscosity of 1020 Pa s, which increases to 5 x 1020 Pa s down to 670 km depth, and 3.16 x 1021 Pa s to the ... |
format |
Other/Unknown Material |
author |
Scherler, Dirk Werner, Helen Winkelmann, Ricarda Jouvet, Guillaume Klemann, Volker |
author_facet |
Scherler, Dirk Werner, Helen Winkelmann, Ricarda Jouvet, Guillaume Klemann, Volker |
author_sort |
Scherler, Dirk |
title |
Glacial and erosional contributions to Late Quaternary uplift of the European Alps (GEOLQUEA) |
title_short |
Glacial and erosional contributions to Late Quaternary uplift of the European Alps (GEOLQUEA) |
title_full |
Glacial and erosional contributions to Late Quaternary uplift of the European Alps (GEOLQUEA) |
title_fullStr |
Glacial and erosional contributions to Late Quaternary uplift of the European Alps (GEOLQUEA) |
title_full_unstemmed |
Glacial and erosional contributions to Late Quaternary uplift of the European Alps (GEOLQUEA) |
title_sort |
glacial and erosional contributions to late quaternary uplift of the european alps (geolquea) |
publishDate |
2023 |
url |
https://refubium.fu-berlin.de/handle/fub188/41360 https://doi.org/10.17169/refubium-41081 |
genre |
Ice cap Ice Sheet |
genre_facet |
Ice cap Ice Sheet |
op_relation |
https://refubium.fu-berlin.de/handle/fub188/41360 http://dx.doi.org/10.17169/refubium-41081 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17169/refubium-41081 |
_version_ |
1784272535544659968 |