DataSheet1_Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry.pdf
The dynamic stability of the Antarctic Ice Sheet is one of the largest uncertainties in projections of future global sea-level rise. Essential for improving projections of the ice sheet evolution is the understanding of the ongoing trends and accelerations of mass loss in the context of ice dynamics...
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Online Access: | https://doi.org/10.3389/feart.2021.741789.s001 https://figshare.com/articles/dataset/DataSheet1_Acceleration_of_Dynamic_Ice_Loss_in_Antarctica_From_Satellite_Gravimetry_pdf/17695127 |
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ftfrontimediafig:oai:figshare.com:article/17695127 2023-05-15T13:58:46+02:00 DataSheet1_Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry.pdf Theresa Diener Ingo Sasgen Cécile Agosta Johannes J. Fürst Matthias H. Braun Hannes Konrad Xavier Fettweis 2021-12-27T14:37:51Z https://doi.org/10.3389/feart.2021.741789.s001 https://figshare.com/articles/dataset/DataSheet1_Acceleration_of_Dynamic_Ice_Loss_in_Antarctica_From_Satellite_Gravimetry_pdf/17695127 unknown doi:10.3389/feart.2021.741789.s001 https://figshare.com/articles/dataset/DataSheet1_Acceleration_of_Dynamic_Ice_Loss_in_Antarctica_From_Satellite_Gravimetry_pdf/17695127 CC BY 4.0 CC-BY Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Antarctica GRACE/GRACE-FO ice-dynamic discharge surface mass balance sea-level rise (SLR) mass balance ISMIP6 climate indices Dataset 2021 ftfrontimediafig https://doi.org/10.3389/feart.2021.741789.s001 2021-12-30T00:00:23Z The dynamic stability of the Antarctic Ice Sheet is one of the largest uncertainties in projections of future global sea-level rise. Essential for improving projections of the ice sheet evolution is the understanding of the ongoing trends and accelerations of mass loss in the context of ice dynamics. Here, we examine accelerations of mass change of the Antarctic Ice Sheet from 2002 to 2020 using data from the GRACE (Gravity Recovery and Climate Experiment; 2002–2017) and its follow-on GRACE-FO (2018-present) satellite missions. By subtracting estimates of net snow accumulation provided by re-analysis data and regional climate models from GRACE/GRACE-FO mass changes, we isolate variations in ice-dynamic discharge and compare them to direct measurements based on the remote sensing of the surface-ice velocity (2002–2017). We show that variations in the GRACE/GRACE-FO time series are modulated by variations in regional snow accumulation caused by large-scale atmospheric circulation. We show for the first time that, after removal of these surface effects, accelerations of ice-dynamic discharge from GRACE/GRACE-FO agree well with those independently derived from surface-ice velocities. For 2002–2020, we recover a discharge acceleration of -5.3 ± 2.2 Gt yr −2 for the entire ice sheet; these increasing losses originate mainly in the Amundsen and Bellingshausen Sea Embayment regions (68%), with additional significant contributions from Dronning Maud Land (18%) and the Filchner-Ronne Ice Shelf region (13%). Under the assumption that the recovered rates and accelerations of mass loss persisted independent of any external forcing, Antarctica would contribute 7.6 ± 2.9 cm to global mean sea-level rise by the year 2100, more than two times the amount of 2.9 ± 0.6 cm obtained by linear extrapolation of current GRACE/GRACE-FO mass loss trends. Dataset Antarc* Antarctic Antarctica Bellingshausen Sea Dronning Maud Land Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf Frontiers: Figshare Antarctic The Antarctic Dronning Maud Land Bellingshausen Sea Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
institution |
Open Polar |
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Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Antarctica GRACE/GRACE-FO ice-dynamic discharge surface mass balance sea-level rise (SLR) mass balance ISMIP6 climate indices |
spellingShingle |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Antarctica GRACE/GRACE-FO ice-dynamic discharge surface mass balance sea-level rise (SLR) mass balance ISMIP6 climate indices Theresa Diener Ingo Sasgen Cécile Agosta Johannes J. Fürst Matthias H. Braun Hannes Konrad Xavier Fettweis DataSheet1_Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry.pdf |
topic_facet |
Solid Earth Sciences Climate Science Atmospheric Sciences not elsewhere classified Exploration Geochemistry Inorganic Geochemistry Isotope Geochemistry Organic Geochemistry Geochemistry not elsewhere classified Igneous and Metamorphic Petrology Ore Deposit Petrology Palaeontology (incl. Palynology) Structural Geology Tectonics Volcanology Geology not elsewhere classified Seismology and Seismic Exploration Glaciology Hydrogeology Natural Hazards Quaternary Environments Earth Sciences not elsewhere classified Evolutionary Impacts of Climate Change Antarctica GRACE/GRACE-FO ice-dynamic discharge surface mass balance sea-level rise (SLR) mass balance ISMIP6 climate indices |
description |
The dynamic stability of the Antarctic Ice Sheet is one of the largest uncertainties in projections of future global sea-level rise. Essential for improving projections of the ice sheet evolution is the understanding of the ongoing trends and accelerations of mass loss in the context of ice dynamics. Here, we examine accelerations of mass change of the Antarctic Ice Sheet from 2002 to 2020 using data from the GRACE (Gravity Recovery and Climate Experiment; 2002–2017) and its follow-on GRACE-FO (2018-present) satellite missions. By subtracting estimates of net snow accumulation provided by re-analysis data and regional climate models from GRACE/GRACE-FO mass changes, we isolate variations in ice-dynamic discharge and compare them to direct measurements based on the remote sensing of the surface-ice velocity (2002–2017). We show that variations in the GRACE/GRACE-FO time series are modulated by variations in regional snow accumulation caused by large-scale atmospheric circulation. We show for the first time that, after removal of these surface effects, accelerations of ice-dynamic discharge from GRACE/GRACE-FO agree well with those independently derived from surface-ice velocities. For 2002–2020, we recover a discharge acceleration of -5.3 ± 2.2 Gt yr −2 for the entire ice sheet; these increasing losses originate mainly in the Amundsen and Bellingshausen Sea Embayment regions (68%), with additional significant contributions from Dronning Maud Land (18%) and the Filchner-Ronne Ice Shelf region (13%). Under the assumption that the recovered rates and accelerations of mass loss persisted independent of any external forcing, Antarctica would contribute 7.6 ± 2.9 cm to global mean sea-level rise by the year 2100, more than two times the amount of 2.9 ± 0.6 cm obtained by linear extrapolation of current GRACE/GRACE-FO mass loss trends. |
format |
Dataset |
author |
Theresa Diener Ingo Sasgen Cécile Agosta Johannes J. Fürst Matthias H. Braun Hannes Konrad Xavier Fettweis |
author_facet |
Theresa Diener Ingo Sasgen Cécile Agosta Johannes J. Fürst Matthias H. Braun Hannes Konrad Xavier Fettweis |
author_sort |
Theresa Diener |
title |
DataSheet1_Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry.pdf |
title_short |
DataSheet1_Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry.pdf |
title_full |
DataSheet1_Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry.pdf |
title_fullStr |
DataSheet1_Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry.pdf |
title_full_unstemmed |
DataSheet1_Acceleration of Dynamic Ice Loss in Antarctica From Satellite Gravimetry.pdf |
title_sort |
datasheet1_acceleration of dynamic ice loss in antarctica from satellite gravimetry.pdf |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.741789.s001 https://figshare.com/articles/dataset/DataSheet1_Acceleration_of_Dynamic_Ice_Loss_in_Antarctica_From_Satellite_Gravimetry_pdf/17695127 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic The Antarctic Dronning Maud Land Bellingshausen Sea Ronne Ice Shelf |
geographic_facet |
Antarctic The Antarctic Dronning Maud Land Bellingshausen Sea Ronne Ice Shelf |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea Dronning Maud Land Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea Dronning Maud Land Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf |
op_relation |
doi:10.3389/feart.2021.741789.s001 https://figshare.com/articles/dataset/DataSheet1_Acceleration_of_Dynamic_Ice_Loss_in_Antarctica_From_Satellite_Gravimetry_pdf/17695127 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/feart.2021.741789.s001 |
_version_ |
1766267114813915136 |