The influence of inter-annual temperature variability on the Greenland Ice Sheet volume
The Greenland Ice Sheet has become an increasingly larger contributor to sea level rise in the past two decades and is projected to continue to lose mass. Climate variability is expected to increase under future warming, but the effect of climate variability on the Greenland Ice Sheet volume is poor...
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| Format: | Article |
| Language: | English |
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Cambridge University Press
2023-09-01
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| Series: | Annals of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0260305523000538/type/journal_article |
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| author | Mikkel Lauritzen Guðfinna Aðalgeirsdóttir Nicholas Rathmann Aslak Grinsted Brice Noël Christine S. Hvidberg |
| author_facet | Mikkel Lauritzen Guðfinna Aðalgeirsdóttir Nicholas Rathmann Aslak Grinsted Brice Noël Christine S. Hvidberg |
| author_sort | Mikkel Lauritzen |
| collection | DOAJ |
| description | The Greenland Ice Sheet has become an increasingly larger contributor to sea level rise in the past two decades and is projected to continue to lose mass. Climate variability is expected to increase under future warming, but the effect of climate variability on the Greenland Ice Sheet volume is poorly understood and is adding to the uncertainty of the projected mass loss. Here we quantify the influence of inter-annual temperature variability on mass loss from the Greenland Ice Sheet using the PISM model. We construct an ensemble of temperature-forcing fields that accounts for inter-annual variability in temperature using reanalysis data from NOAA-CIRES over the period 1851–2014. We investigate the steady-state and transient response of the Greenland Ice Sheet. We find that the simulated steady-state ice-sheet volume decreases by 1.9 ± 0.4 cm of sea level equivalent when forced with a varying temperature forcing compared to a constant temperature forcing, and by 11.5 ± 1.4 cm when the variability is doubled. The northern basins are particularly sensitive with a change in volume of 0.9–1.1%. Our results emphasize the importance of including temperature variability in projections of future mass loss. |
| format | Article |
| id | doaj-art-e2572bac4f4a46c5bf4ff114fef14f9d |
| institution | Kabale University |
| issn | 0260-3055 1727-5644 |
| language | English |
| publishDate | 2023-09-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Annals of Glaciology |
| spelling | doaj-art-e2572bac4f4a46c5bf4ff114fef14f9d2024-11-27T11:13:48ZengCambridge University PressAnnals of Glaciology0260-30551727-56442023-09-016426827510.1017/aog.2023.53The influence of inter-annual temperature variability on the Greenland Ice Sheet volumeMikkel Lauritzen0https://orcid.org/0000-0002-5951-9339Guðfinna Aðalgeirsdóttir1Nicholas Rathmann2https://orcid.org/0000-0001-7140-0931Aslak Grinsted3https://orcid.org/0000-0003-1634-6009Brice Noël4Christine S. Hvidberg5https://orcid.org/0000-0002-9665-1339Niels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkInstitute of Earth Sciences, University of Iceland, Reykjavík, IcelandNiels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkNiels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkDepartment of Geography Laboratoire de Climatologie et Topoclimatologie, University of Liége, Liége, BelgiumNiels Bohr Institute, University of Copenhagen, Copenhagen, DenmarkThe Greenland Ice Sheet has become an increasingly larger contributor to sea level rise in the past two decades and is projected to continue to lose mass. Climate variability is expected to increase under future warming, but the effect of climate variability on the Greenland Ice Sheet volume is poorly understood and is adding to the uncertainty of the projected mass loss. Here we quantify the influence of inter-annual temperature variability on mass loss from the Greenland Ice Sheet using the PISM model. We construct an ensemble of temperature-forcing fields that accounts for inter-annual variability in temperature using reanalysis data from NOAA-CIRES over the period 1851–2014. We investigate the steady-state and transient response of the Greenland Ice Sheet. We find that the simulated steady-state ice-sheet volume decreases by 1.9 ± 0.4 cm of sea level equivalent when forced with a varying temperature forcing compared to a constant temperature forcing, and by 11.5 ± 1.4 cm when the variability is doubled. The northern basins are particularly sensitive with a change in volume of 0.9–1.1%. Our results emphasize the importance of including temperature variability in projections of future mass loss.https://www.cambridge.org/core/product/identifier/S0260305523000538/type/journal_articleclimate changice-sheet mass balanceice-sheet modeling |
| spellingShingle | Mikkel Lauritzen Guðfinna Aðalgeirsdóttir Nicholas Rathmann Aslak Grinsted Brice Noël Christine S. Hvidberg The influence of inter-annual temperature variability on the Greenland Ice Sheet volume Annals of Glaciology climate chang ice-sheet mass balance ice-sheet modeling |
| title | The influence of inter-annual temperature variability on the Greenland Ice Sheet volume |
| title_full | The influence of inter-annual temperature variability on the Greenland Ice Sheet volume |
| title_fullStr | The influence of inter-annual temperature variability on the Greenland Ice Sheet volume |
| title_full_unstemmed | The influence of inter-annual temperature variability on the Greenland Ice Sheet volume |
| title_short | The influence of inter-annual temperature variability on the Greenland Ice Sheet volume |
| title_sort | influence of inter annual temperature variability on the greenland ice sheet volume |
| topic | climate chang ice-sheet mass balance ice-sheet modeling |
| url | https://www.cambridge.org/core/product/identifier/S0260305523000538/type/journal_article |
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