Modelling the behavior of Jakobshavn glacier in the last century
Current model estimates of the Greenland Ice Sheet (GrIS) are almost entirely based on coarse grids (>10km) and constrained by climate models that span from 60s to present. To improve the projection of future sea level rise, a long-term data record that reveals the mass balance beyond decadal tim...
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ftdtupubl:oai:pure.atira.dk:publications/29283f5b-9aeb-462e-84d0-382132abd459 2024-09-15T18:07:44+00:00 Modelling the behavior of Jakobshavn glacier in the last century Muresan, Ioana Stefania Khroulev, Constantine Khan, Shfaqat Abbas Kjær, Kurt Box, Jason E. 2014 application/pdf https://orbit.dtu.dk/en/publications/29283f5b-9aeb-462e-84d0-382132abd459 https://backend.orbit.dtu.dk/ws/files/97831104/IGS.pdf http://www.igsoc.org/symposia/2014/chamonix/proceedings/proceedings.html eng eng IGS https://orbit.dtu.dk/en/publications/29283f5b-9aeb-462e-84d0-382132abd459 info:eu-repo/semantics/openAccess Muresan , I S , Khroulev , C , Khan , S A , Kjær , K & Box , J E 2014 , Modelling the behavior of Jakobshavn glacier in the last century . in Proceedings of the Chamonix Symposium . , 70A1071 , IGS , Chamonix, France , International Symposium on Contribution of Glaciers and Ice Sheets to Sea Level Change 2014 , Chamonix , France , 26/05/2014 . < http://www.igsoc.org/symposia/2014/chamonix/proceedings/proceedings.html > /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action conferenceObject 2014 ftdtupubl 2024-07-01T23:52:53Z Current model estimates of the Greenland Ice Sheet (GrIS) are almost entirely based on coarse grids (>10km) and constrained by climate models that span from 60s to present. To improve the projection of future sea level rise, a long-term data record that reveals the mass balance beyond decadal timescale is required. Here, we use a continuous 171 year reconstruction (since the end of the Little Ice Age) by J.E. Box of the Greenland Ice Sheet climatic surface mass balance and its sub-components to study the interaction between climate and the cryosphere originating in changes in the surface mass balance and dynamics of the GrIS over the last 111 years. Throughout our study, we use the Parallel Ice Sheet Model (PISM) capabilities. The initialization of the ice sheet is performed on a 5 km grid using paleo climatic forcing (125 ka to present) based on a positive degree day (PDD) model. For a better overview and for the purpose of increasing the resolution to 2 km, our study focuses only on the Jakobshavn glacier. In order to determine the locations of the flow for the regional model, a drainage basin mask was extracted from the surface elevation data based on the gradient flow. While inside the basin mask the full PISM model is applied, outside the basin mask the boundary conditions are taken as captured by the whole Greenland initialization. Considering the surface mass balanced reconstruction where the monthly accumulation rates are assumed to be 1/12 of the annual accumulation, a yearly 1900-2011 climatic forcing is applied in the regional run. Conference Object glacier Greenland Ice Sheet Jakobshavn Technical University of Denmark: DTU Orbit |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Muresan, Ioana Stefania Khroulev, Constantine Khan, Shfaqat Abbas Kjær, Kurt Box, Jason E. Modelling the behavior of Jakobshavn glacier in the last century |
topic_facet |
/dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Current model estimates of the Greenland Ice Sheet (GrIS) are almost entirely based on coarse grids (>10km) and constrained by climate models that span from 60s to present. To improve the projection of future sea level rise, a long-term data record that reveals the mass balance beyond decadal timescale is required. Here, we use a continuous 171 year reconstruction (since the end of the Little Ice Age) by J.E. Box of the Greenland Ice Sheet climatic surface mass balance and its sub-components to study the interaction between climate and the cryosphere originating in changes in the surface mass balance and dynamics of the GrIS over the last 111 years. Throughout our study, we use the Parallel Ice Sheet Model (PISM) capabilities. The initialization of the ice sheet is performed on a 5 km grid using paleo climatic forcing (125 ka to present) based on a positive degree day (PDD) model. For a better overview and for the purpose of increasing the resolution to 2 km, our study focuses only on the Jakobshavn glacier. In order to determine the locations of the flow for the regional model, a drainage basin mask was extracted from the surface elevation data based on the gradient flow. While inside the basin mask the full PISM model is applied, outside the basin mask the boundary conditions are taken as captured by the whole Greenland initialization. Considering the surface mass balanced reconstruction where the monthly accumulation rates are assumed to be 1/12 of the annual accumulation, a yearly 1900-2011 climatic forcing is applied in the regional run. |
format |
Conference Object |
author |
Muresan, Ioana Stefania Khroulev, Constantine Khan, Shfaqat Abbas Kjær, Kurt Box, Jason E. |
author_facet |
Muresan, Ioana Stefania Khroulev, Constantine Khan, Shfaqat Abbas Kjær, Kurt Box, Jason E. |
author_sort |
Muresan, Ioana Stefania |
title |
Modelling the behavior of Jakobshavn glacier in the last century |
title_short |
Modelling the behavior of Jakobshavn glacier in the last century |
title_full |
Modelling the behavior of Jakobshavn glacier in the last century |
title_fullStr |
Modelling the behavior of Jakobshavn glacier in the last century |
title_full_unstemmed |
Modelling the behavior of Jakobshavn glacier in the last century |
title_sort |
modelling the behavior of jakobshavn glacier in the last century |
publisher |
IGS |
publishDate |
2014 |
url |
https://orbit.dtu.dk/en/publications/29283f5b-9aeb-462e-84d0-382132abd459 https://backend.orbit.dtu.dk/ws/files/97831104/IGS.pdf http://www.igsoc.org/symposia/2014/chamonix/proceedings/proceedings.html |
genre |
glacier Greenland Ice Sheet Jakobshavn |
genre_facet |
glacier Greenland Ice Sheet Jakobshavn |
op_source |
Muresan , I S , Khroulev , C , Khan , S A , Kjær , K & Box , J E 2014 , Modelling the behavior of Jakobshavn glacier in the last century . in Proceedings of the Chamonix Symposium . , 70A1071 , IGS , Chamonix, France , International Symposium on Contribution of Glaciers and Ice Sheets to Sea Level Change 2014 , Chamonix , France , 26/05/2014 . < http://www.igsoc.org/symposia/2014/chamonix/proceedings/proceedings.html > |
op_relation |
https://orbit.dtu.dk/en/publications/29283f5b-9aeb-462e-84d0-382132abd459 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1810445102856798208 |