The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE
The Greenland Ice Sheet has steadily lost mass over the past decades, presently representing the second-largest single contributor to global sea-level rise. Even the glaciers draining the Northeast Greenland ice stream have been observed to retreat and thin. Here, we present a comprehensive study of...
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ftcopernicus:oai:publications.copernicus.org:egusphere118795 2024-06-23T07:52:54+00:00 The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE Kanzow, Torsten Humbert, Angelika Mölg, Thomas Scheinert, Mirko Braun, Matthias Burchard, Hans Doglioni, Francesca Hochreuther, Philipp Horwath, Martin Huhn, Oliver Kusche, Jürgen Loebel, Erik Lutz, Katrina Marzeion, Ben McPherson, Rebecca Mohammadi-Aragh, Mahdi Möller, Marco Pickler, Carolyne Reinert, Markus Rhein, Monika Rückamp, Martin Schaffer, Janin Shafeeque, Muhammad Stolzenberger, Sophie Timmermann, Ralph Turton, Jenny Wekerle, Claudia Zeising, Ole 2024-04-29 application/pdf https://doi.org/10.5194/egusphere-2024-757 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-757/ eng eng doi:10.5194/egusphere-2024-757 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-757/ eISSN: Text 2024 ftcopernicus https://doi.org/10.5194/egusphere-2024-757 2024-06-13T01:24:45Z The Greenland Ice Sheet has steadily lost mass over the past decades, presently representing the second-largest single contributor to global sea-level rise. Even the glaciers draining the Northeast Greenland ice stream have been observed to retreat and thin. Here, we present a comprehensive study of processes affecting and being affected by the mass balance of marine terminating and peripheral glaciers in Northeast Greenland. Our focus is on the 79N Glacier (79NG), which hosts Greenland’s largest floating ice tongue. We provide new insight into the ice surface melt, ice mass balance, glacier dynamics, regional solid earth response, ocean-driven basal melt and the consequences of meltwater discharge into the ocean. Our study is based on observations, remote sensing and simulations with numerical models of different complexity, most of them originating from the Greenland Ice Sheet–Ocean Interaction Experiment (GROCE). We find the overall negative climatic mass balance of the 79NG to co-vary with summertime volumes of supraglacial lakes, and show the spatial pattern of overall negative ice mass balance for NE Greenland to be mirrored by the pattern of glacial isostatic adjustment. We find near coastal mass losses of both marine terminating and peripheral glaciers in NE Greenland to be of similar magnitude in the last decade. In contrast to the neighboring Zachariae Isstrøm, the 79NG – despite experiencing massive thinning of the floating tongue – has resisted an acceleration of ice discharge across the grounding line due to buttressing imposed by lateral friction of the 70 km-long ice tongue in the narrow glacial fjord. Observations and models employed in this study are consistent in terms of melt rates occurring below the floating ice tongue. Our results suggest the multidecadal warming of Atlantic Intermediate Water flowing into the cavity below the ice tongue – supplied by the recirculating branch of the West Spitsbergen Current in Fram Strait ... Text Fram Strait glacier Greenland Ice Sheet Spitsbergen Copernicus Publications: E-Journals Greenland |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The Greenland Ice Sheet has steadily lost mass over the past decades, presently representing the second-largest single contributor to global sea-level rise. Even the glaciers draining the Northeast Greenland ice stream have been observed to retreat and thin. Here, we present a comprehensive study of processes affecting and being affected by the mass balance of marine terminating and peripheral glaciers in Northeast Greenland. Our focus is on the 79N Glacier (79NG), which hosts Greenland’s largest floating ice tongue. We provide new insight into the ice surface melt, ice mass balance, glacier dynamics, regional solid earth response, ocean-driven basal melt and the consequences of meltwater discharge into the ocean. Our study is based on observations, remote sensing and simulations with numerical models of different complexity, most of them originating from the Greenland Ice Sheet–Ocean Interaction Experiment (GROCE). We find the overall negative climatic mass balance of the 79NG to co-vary with summertime volumes of supraglacial lakes, and show the spatial pattern of overall negative ice mass balance for NE Greenland to be mirrored by the pattern of glacial isostatic adjustment. We find near coastal mass losses of both marine terminating and peripheral glaciers in NE Greenland to be of similar magnitude in the last decade. In contrast to the neighboring Zachariae Isstrøm, the 79NG – despite experiencing massive thinning of the floating tongue – has resisted an acceleration of ice discharge across the grounding line due to buttressing imposed by lateral friction of the 70 km-long ice tongue in the narrow glacial fjord. Observations and models employed in this study are consistent in terms of melt rates occurring below the floating ice tongue. Our results suggest the multidecadal warming of Atlantic Intermediate Water flowing into the cavity below the ice tongue – supplied by the recirculating branch of the West Spitsbergen Current in Fram Strait ... |
format |
Text |
author |
Kanzow, Torsten Humbert, Angelika Mölg, Thomas Scheinert, Mirko Braun, Matthias Burchard, Hans Doglioni, Francesca Hochreuther, Philipp Horwath, Martin Huhn, Oliver Kusche, Jürgen Loebel, Erik Lutz, Katrina Marzeion, Ben McPherson, Rebecca Mohammadi-Aragh, Mahdi Möller, Marco Pickler, Carolyne Reinert, Markus Rhein, Monika Rückamp, Martin Schaffer, Janin Shafeeque, Muhammad Stolzenberger, Sophie Timmermann, Ralph Turton, Jenny Wekerle, Claudia Zeising, Ole |
spellingShingle |
Kanzow, Torsten Humbert, Angelika Mölg, Thomas Scheinert, Mirko Braun, Matthias Burchard, Hans Doglioni, Francesca Hochreuther, Philipp Horwath, Martin Huhn, Oliver Kusche, Jürgen Loebel, Erik Lutz, Katrina Marzeion, Ben McPherson, Rebecca Mohammadi-Aragh, Mahdi Möller, Marco Pickler, Carolyne Reinert, Markus Rhein, Monika Rückamp, Martin Schaffer, Janin Shafeeque, Muhammad Stolzenberger, Sophie Timmermann, Ralph Turton, Jenny Wekerle, Claudia Zeising, Ole The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE |
author_facet |
Kanzow, Torsten Humbert, Angelika Mölg, Thomas Scheinert, Mirko Braun, Matthias Burchard, Hans Doglioni, Francesca Hochreuther, Philipp Horwath, Martin Huhn, Oliver Kusche, Jürgen Loebel, Erik Lutz, Katrina Marzeion, Ben McPherson, Rebecca Mohammadi-Aragh, Mahdi Möller, Marco Pickler, Carolyne Reinert, Markus Rhein, Monika Rückamp, Martin Schaffer, Janin Shafeeque, Muhammad Stolzenberger, Sophie Timmermann, Ralph Turton, Jenny Wekerle, Claudia Zeising, Ole |
author_sort |
Kanzow, Torsten |
title |
The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE |
title_short |
The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE |
title_full |
The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE |
title_fullStr |
The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE |
title_full_unstemmed |
The atmosphere-land/ice-ocean system in the region near the 79N Glacier in Northeast Greenland: Synthesis and key findings from GROCE |
title_sort |
atmosphere-land/ice-ocean system in the region near the 79n glacier in northeast greenland: synthesis and key findings from groce |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2024-757 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-757/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Fram Strait glacier Greenland Ice Sheet Spitsbergen |
genre_facet |
Fram Strait glacier Greenland Ice Sheet Spitsbergen |
op_source |
eISSN: |
op_relation |
doi:10.5194/egusphere-2024-757 https://egusphere.copernicus.org/preprints/2024/egusphere-2024-757/ |
op_doi |
https://doi.org/10.5194/egusphere-2024-757 |
_version_ |
1802644324402331648 |