An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations
The Greenland ice sheet is a major contributor to sea level rise, adding on average 0.47 ± 0.23 mm year −1 to global mean sea level between 1991 and 2015. The cryosphere as a whole has contributed around 45% of observed global sea level rise since 1993. Understanding the present-day state of the Gre...
Published in: | Remote Sensing |
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Online Access: | https://orbit.dtu.dk/en/publications/6c397f77-dbda-4fb1-8ead-df4eb8f3f5f5 https://doi.org/10.3390/rs11121407 https://backend.orbit.dtu.dk/ws/files/182829082/remotesensing_11_01407_2_.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/6c397f77-dbda-4fb1-8ead-df4eb8f3f5f5 2024-04-28T08:19:57+00:00 An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations Mottram, Ruth Simonsen, Sebastian B. Høyer Svendsen, Synne Barletta, Valentina R. Sørensen, Louise Sandberg Nagler, Thomas Wuite, Jan Groh, Andreas Horwath, Martin Rosier, Job Solgaard, Anne S. Hvidberg, Christine Forsberg, René 2019 application/pdf https://orbit.dtu.dk/en/publications/6c397f77-dbda-4fb1-8ead-df4eb8f3f5f5 https://doi.org/10.3390/rs11121407 https://backend.orbit.dtu.dk/ws/files/182829082/remotesensing_11_01407_2_.pdf eng eng https://orbit.dtu.dk/en/publications/6c397f77-dbda-4fb1-8ead-df4eb8f3f5f5 info:eu-repo/semantics/openAccess Mottram , R , Simonsen , S B , Høyer Svendsen , S , Barletta , V R , Sørensen , L S , Nagler , T , Wuite , J , Groh , A , Horwath , M , Rosier , J , Solgaard , A , S. Hvidberg , C & Forsberg , R 2019 , ' An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations ' , Remote Sensing , vol. 11 , no. 12 , 1407 . https://doi.org/10.3390/rs11121407 Climate Change Initiative (CCI) Greenland ice sheet Mass budget Cryosphere Sea level rise Altimetry Mass balance Ice sheet modelling /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2019 ftdtupubl https://doi.org/10.3390/rs11121407 2024-04-03T15:40:44Z The Greenland ice sheet is a major contributor to sea level rise, adding on average 0.47 ± 0.23 mm year −1 to global mean sea level between 1991 and 2015. The cryosphere as a whole has contributed around 45% of observed global sea level rise since 1993. Understanding the present-day state of the Greenland ice sheet is therefore vital for understanding the processes controlling the modern-day rates of sea level change and for making projections of sea level rise into the future. Here, we provide an overview of the current state of the mass budget of Greenland based on a diverse range of remote sensing observations to produce the essential climate variables (ECVs) of ice velocity, surface elevation change, grounding line location, calving front location, and gravimetric mass balance as well as numerical modelling that together build a consistent picture of a shrinking ice sheet. We also combine these observations with output from a regional climate model and from an ice sheet model to gain insight into existing biases in ice sheet dynamics and surface mass balance processes. Observations show surface lowering across virtually all regions of the ice sheet and at some locations up to −2.65 m year −1 between 1995 and 2017 based on radar altimetry analysis. In addition, calving fronts at 28 study sites, representing a sample of typical glaciers, have retreated all around Greenland since the 1990s and in only two out of 28 study locations have they remained stable. During the same period, two of five floating ice shelves have collapsed while the locations of grounding lines at the remaining three floating ice shelves have remained stable over the observation period. In a detailed case study with a fracture model at Petermann glacier, we demonstrate the potential sensitivity of these floating ice shelves to future warming. GRACE gravimetrically-derived mass balance (GMB) data shows that overall Greenland has lost 255 ± 15 Gt year −1 of ice over the period 2003 to 2016, consistent with that shown by IMBIE and a marked ... Article in Journal/Newspaper glacier Greenland Ice Sheet Ice Shelves Petermann glacier Technical University of Denmark: DTU Orbit Remote Sensing 11 12 1407 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Climate Change Initiative (CCI) Greenland ice sheet Mass budget Cryosphere Sea level rise Altimetry Mass balance Ice sheet modelling /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
Climate Change Initiative (CCI) Greenland ice sheet Mass budget Cryosphere Sea level rise Altimetry Mass balance Ice sheet modelling /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Mottram, Ruth Simonsen, Sebastian B. Høyer Svendsen, Synne Barletta, Valentina R. Sørensen, Louise Sandberg Nagler, Thomas Wuite, Jan Groh, Andreas Horwath, Martin Rosier, Job Solgaard, Anne S. Hvidberg, Christine Forsberg, René An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations |
topic_facet |
Climate Change Initiative (CCI) Greenland ice sheet Mass budget Cryosphere Sea level rise Altimetry Mass balance Ice sheet modelling /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
The Greenland ice sheet is a major contributor to sea level rise, adding on average 0.47 ± 0.23 mm year −1 to global mean sea level between 1991 and 2015. The cryosphere as a whole has contributed around 45% of observed global sea level rise since 1993. Understanding the present-day state of the Greenland ice sheet is therefore vital for understanding the processes controlling the modern-day rates of sea level change and for making projections of sea level rise into the future. Here, we provide an overview of the current state of the mass budget of Greenland based on a diverse range of remote sensing observations to produce the essential climate variables (ECVs) of ice velocity, surface elevation change, grounding line location, calving front location, and gravimetric mass balance as well as numerical modelling that together build a consistent picture of a shrinking ice sheet. We also combine these observations with output from a regional climate model and from an ice sheet model to gain insight into existing biases in ice sheet dynamics and surface mass balance processes. Observations show surface lowering across virtually all regions of the ice sheet and at some locations up to −2.65 m year −1 between 1995 and 2017 based on radar altimetry analysis. In addition, calving fronts at 28 study sites, representing a sample of typical glaciers, have retreated all around Greenland since the 1990s and in only two out of 28 study locations have they remained stable. During the same period, two of five floating ice shelves have collapsed while the locations of grounding lines at the remaining three floating ice shelves have remained stable over the observation period. In a detailed case study with a fracture model at Petermann glacier, we demonstrate the potential sensitivity of these floating ice shelves to future warming. GRACE gravimetrically-derived mass balance (GMB) data shows that overall Greenland has lost 255 ± 15 Gt year −1 of ice over the period 2003 to 2016, consistent with that shown by IMBIE and a marked ... |
format |
Article in Journal/Newspaper |
author |
Mottram, Ruth Simonsen, Sebastian B. Høyer Svendsen, Synne Barletta, Valentina R. Sørensen, Louise Sandberg Nagler, Thomas Wuite, Jan Groh, Andreas Horwath, Martin Rosier, Job Solgaard, Anne S. Hvidberg, Christine Forsberg, René |
author_facet |
Mottram, Ruth Simonsen, Sebastian B. Høyer Svendsen, Synne Barletta, Valentina R. Sørensen, Louise Sandberg Nagler, Thomas Wuite, Jan Groh, Andreas Horwath, Martin Rosier, Job Solgaard, Anne S. Hvidberg, Christine Forsberg, René |
author_sort |
Mottram, Ruth |
title |
An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations |
title_short |
An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations |
title_full |
An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations |
title_fullStr |
An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations |
title_full_unstemmed |
An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations |
title_sort |
integrated view of greenland ice sheet mass changes based on models and satellite observations |
publishDate |
2019 |
url |
https://orbit.dtu.dk/en/publications/6c397f77-dbda-4fb1-8ead-df4eb8f3f5f5 https://doi.org/10.3390/rs11121407 https://backend.orbit.dtu.dk/ws/files/182829082/remotesensing_11_01407_2_.pdf |
genre |
glacier Greenland Ice Sheet Ice Shelves Petermann glacier |
genre_facet |
glacier Greenland Ice Sheet Ice Shelves Petermann glacier |
op_source |
Mottram , R , Simonsen , S B , Høyer Svendsen , S , Barletta , V R , Sørensen , L S , Nagler , T , Wuite , J , Groh , A , Horwath , M , Rosier , J , Solgaard , A , S. Hvidberg , C & Forsberg , R 2019 , ' An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations ' , Remote Sensing , vol. 11 , no. 12 , 1407 . https://doi.org/10.3390/rs11121407 |
op_relation |
https://orbit.dtu.dk/en/publications/6c397f77-dbda-4fb1-8ead-df4eb8f3f5f5 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/rs11121407 |
container_title |
Remote Sensing |
container_volume |
11 |
container_issue |
12 |
container_start_page |
1407 |
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1797583148963332096 |