GroMoPo Metadata for Nordfjord glacier ice model
Basal water pressure and water flow patterns are significant factors in controlling the behavior of an ice sheet, because they influence ice-sheet thickness, stability and extent. Water produced by basal melting may infiltrate the subsurface, or occur as sheet or channelized flow at the ice/bed inte...
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dataone:sha256:ca3cab11fa4f784bf821d894e90d9f1c93e783740be19f39d236f52352de0528 2024-06-03T18:46:51+00:00 GroMoPo Metadata for Nordfjord glacier ice model GroMoPo Emilia Leijnse ENVELOPE(4.8343,9.7685,62.4105,58.3477) 2023-02-08T00:00:00Z https://search.dataone.org/view/sha256:ca3cab11fa4f784bf821d894e90d9f1c93e783740be19f39d236f52352de0528 unknown GroMoPo Ice flow modelling and meltwater modelling M. P. Anderson D. M. Mickelson Climate change C. Winguth MODFLOW C. A. Moeller Static water levels Dataset dataone:urn:node:HYDROSHARE 2024-06-03T18:19:11Z Basal water pressure and water flow patterns are significant factors in controlling the behavior of an ice sheet, because they influence ice-sheet thickness, stability and extent. Water produced by basal melting may infiltrate the subsurface, or occur as sheet or channelized flow at the ice/bed interface. We examine subglacial groundwater conditions along a flowline of the Scandinavian ice sheet through Nordfjord, in the western fjords region of southern Norway, using a steady-state, two-dimensional groundwater-flow model. Meltwater input to the groundwater model is calculated by a two-dimensional, time-dependent, thermomechanically coupled ice-flow model oriented along the same flowline. Model results show that the subglacial sediments could not have transmitted all the meltwater out of the fjord during times of ice advance and when the ice sheet was at its maximum position at the edge of the continental shelf. In order for pore-water pressures to remain below the overburden pressure of the overlying ice, other paths of subglacial drainage are necessary to remove excess water. During times of retreat, the subglacial aquifer is incapable of transmitting all the meltwater that was probably generated. Pulses of meltwater reaching the bed could explain non-climatically driven margin readvances during the overall retreat phase. Dataset glacier Ice Sheet Unknown Norway ENVELOPE(4.8343,9.7685,62.4105,58.3477) |
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Open Polar |
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Unknown |
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dataone:urn:node:HYDROSHARE |
language |
unknown |
topic |
GroMoPo Ice flow modelling and meltwater modelling M. P. Anderson D. M. Mickelson Climate change C. Winguth MODFLOW C. A. Moeller Static water levels |
spellingShingle |
GroMoPo Ice flow modelling and meltwater modelling M. P. Anderson D. M. Mickelson Climate change C. Winguth MODFLOW C. A. Moeller Static water levels GroMoPo Emilia Leijnse GroMoPo Metadata for Nordfjord glacier ice model |
topic_facet |
GroMoPo Ice flow modelling and meltwater modelling M. P. Anderson D. M. Mickelson Climate change C. Winguth MODFLOW C. A. Moeller Static water levels |
description |
Basal water pressure and water flow patterns are significant factors in controlling the behavior of an ice sheet, because they influence ice-sheet thickness, stability and extent. Water produced by basal melting may infiltrate the subsurface, or occur as sheet or channelized flow at the ice/bed interface. We examine subglacial groundwater conditions along a flowline of the Scandinavian ice sheet through Nordfjord, in the western fjords region of southern Norway, using a steady-state, two-dimensional groundwater-flow model. Meltwater input to the groundwater model is calculated by a two-dimensional, time-dependent, thermomechanically coupled ice-flow model oriented along the same flowline. Model results show that the subglacial sediments could not have transmitted all the meltwater out of the fjord during times of ice advance and when the ice sheet was at its maximum position at the edge of the continental shelf. In order for pore-water pressures to remain below the overburden pressure of the overlying ice, other paths of subglacial drainage are necessary to remove excess water. During times of retreat, the subglacial aquifer is incapable of transmitting all the meltwater that was probably generated. Pulses of meltwater reaching the bed could explain non-climatically driven margin readvances during the overall retreat phase. |
format |
Dataset |
author |
GroMoPo Emilia Leijnse |
author_facet |
GroMoPo Emilia Leijnse |
author_sort |
GroMoPo |
title |
GroMoPo Metadata for Nordfjord glacier ice model |
title_short |
GroMoPo Metadata for Nordfjord glacier ice model |
title_full |
GroMoPo Metadata for Nordfjord glacier ice model |
title_fullStr |
GroMoPo Metadata for Nordfjord glacier ice model |
title_full_unstemmed |
GroMoPo Metadata for Nordfjord glacier ice model |
title_sort |
gromopo metadata for nordfjord glacier ice model |
publishDate |
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url |
https://search.dataone.org/view/sha256:ca3cab11fa4f784bf821d894e90d9f1c93e783740be19f39d236f52352de0528 |
op_coverage |
ENVELOPE(4.8343,9.7685,62.4105,58.3477) |
long_lat |
ENVELOPE(4.8343,9.7685,62.4105,58.3477) |
geographic |
Norway |
geographic_facet |
Norway |
genre |
glacier Ice Sheet |
genre_facet |
glacier Ice Sheet |
_version_ |
1800872018939215872 |