On Timescales and Reversibility of the Ocean's Response to Enhanced Greenland Ice Sheet Melting in Comprehensive Climate Models
Warming of the North Atlantic region in climate history often was associated with massive melting of the Greenland Ice Sheet. To identify the meltwater's impacts and isolate these from internal variability and other global warming factors, we run single‐forcing simulations including small ensem...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1029/2021GL097114 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9990 |
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ftsubggeo:oai:e-docs.geo-leo.de:11858/9990 2023-05-15T16:27:18+02:00 On Timescales and Reversibility of the Ocean's Response to Enhanced Greenland Ice Sheet Melting in Comprehensive Climate Models Martin, Torge Biastoch, Arne Lohmann, Gerrit Mikolajewicz, Uwe Wang, Xuezhu Biastoch, Arne; 1 GEOMAR Helmholtz‐Zentrum Für Ozeanforschung Kiel Kiel Germany Lohmann, Gerrit; 3 Alfred‐Wegener‐Institut Helmholtz‐Zentrum Für Polar‐ und Meeresforschung Bremerhaven Germany Mikolajewicz, Uwe; 4 Max‐Planck‐Instiut Für Meteorologie Hamburg Germany Wang, Xuezhu; 3 Alfred‐Wegener‐Institut Helmholtz‐Zentrum Für Polar‐ und Meeresforschung Bremerhaven Germany 2022-03-01 https://doi.org/10.1029/2021GL097114 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9990 eng eng doi:10.1029/2021GL097114 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9990 This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. CC-BY-NC-ND ddc:551.6 Greenland melting climate models rapid climate change freshwater experiment doc-type:article 2022 ftsubggeo https://doi.org/10.1029/2021GL097114 2022-11-09T06:51:42Z Warming of the North Atlantic region in climate history often was associated with massive melting of the Greenland Ice Sheet. To identify the meltwater's impacts and isolate these from internal variability and other global warming factors, we run single‐forcing simulations including small ensembles using three complex climate models differing only in their ocean components. In 200‐year‐long preindustrial climate simulations, we identify robust consequences of abruptly increasing Greenland runoff by 0.05 Sv: sea level rise of 44 ± 10 cm, subpolar North Atlantic surface cooling of 0.7°C, and a moderate AMOC decline of 1.1–2.0 Sv. The latter two emerge in under three decades—and reverse on the same timescale after the perturbation ends in year 100. The ocean translates the step‐change perturbation into a multidecadal‐to‐centennial signature in the deep overturning circulation. In all simulations, internal variability creates notable uncertainty in estimating trends, time of emergence, and duration of the response. Plain Language Summary: Enhanced melting of Greenland's glaciers is considered to be a major player in past rapid climate transitions and anticipated to soon impact ocean circulation under current global warming. Global warming triggers complex processes and feedbacks, of which greater amounts of meltwater slowing the large‐scale ocean circulation is only one. To better understand the sensitivity of the real but also the model ocean to just this meltwater, we run idealized experiments with up‐to‐date climate models, which use the same atmosphere and land but different ocean components. We find that sea level rise, cooling of the North Atlantic region, and slowing of the ocean circulation are responses common to all models while regional magnitudes of these responses differ considerably. Once we stop adding freshwater, all three models show that surface temperature and ocean circulation recover as quickly (or slowly) as they changed at the beginning of the experiment. Sea level rise is a lasting impact ... Article in Journal/Newspaper Greenland Ice Sheet North Atlantic GEO-LEOe-docs (FID GEO) Greenland Geophysical Research Letters 49 5 |
institution |
Open Polar |
collection |
GEO-LEOe-docs (FID GEO) |
op_collection_id |
ftsubggeo |
language |
English |
topic |
ddc:551.6 Greenland melting climate models rapid climate change freshwater experiment |
spellingShingle |
ddc:551.6 Greenland melting climate models rapid climate change freshwater experiment Martin, Torge Biastoch, Arne Lohmann, Gerrit Mikolajewicz, Uwe Wang, Xuezhu Biastoch, Arne; 1 GEOMAR Helmholtz‐Zentrum Für Ozeanforschung Kiel Kiel Germany Lohmann, Gerrit; 3 Alfred‐Wegener‐Institut Helmholtz‐Zentrum Für Polar‐ und Meeresforschung Bremerhaven Germany Mikolajewicz, Uwe; 4 Max‐Planck‐Instiut Für Meteorologie Hamburg Germany Wang, Xuezhu; 3 Alfred‐Wegener‐Institut Helmholtz‐Zentrum Für Polar‐ und Meeresforschung Bremerhaven Germany On Timescales and Reversibility of the Ocean's Response to Enhanced Greenland Ice Sheet Melting in Comprehensive Climate Models |
topic_facet |
ddc:551.6 Greenland melting climate models rapid climate change freshwater experiment |
description |
Warming of the North Atlantic region in climate history often was associated with massive melting of the Greenland Ice Sheet. To identify the meltwater's impacts and isolate these from internal variability and other global warming factors, we run single‐forcing simulations including small ensembles using three complex climate models differing only in their ocean components. In 200‐year‐long preindustrial climate simulations, we identify robust consequences of abruptly increasing Greenland runoff by 0.05 Sv: sea level rise of 44 ± 10 cm, subpolar North Atlantic surface cooling of 0.7°C, and a moderate AMOC decline of 1.1–2.0 Sv. The latter two emerge in under three decades—and reverse on the same timescale after the perturbation ends in year 100. The ocean translates the step‐change perturbation into a multidecadal‐to‐centennial signature in the deep overturning circulation. In all simulations, internal variability creates notable uncertainty in estimating trends, time of emergence, and duration of the response. Plain Language Summary: Enhanced melting of Greenland's glaciers is considered to be a major player in past rapid climate transitions and anticipated to soon impact ocean circulation under current global warming. Global warming triggers complex processes and feedbacks, of which greater amounts of meltwater slowing the large‐scale ocean circulation is only one. To better understand the sensitivity of the real but also the model ocean to just this meltwater, we run idealized experiments with up‐to‐date climate models, which use the same atmosphere and land but different ocean components. We find that sea level rise, cooling of the North Atlantic region, and slowing of the ocean circulation are responses common to all models while regional magnitudes of these responses differ considerably. Once we stop adding freshwater, all three models show that surface temperature and ocean circulation recover as quickly (or slowly) as they changed at the beginning of the experiment. Sea level rise is a lasting impact ... |
format |
Article in Journal/Newspaper |
author |
Martin, Torge Biastoch, Arne Lohmann, Gerrit Mikolajewicz, Uwe Wang, Xuezhu Biastoch, Arne; 1 GEOMAR Helmholtz‐Zentrum Für Ozeanforschung Kiel Kiel Germany Lohmann, Gerrit; 3 Alfred‐Wegener‐Institut Helmholtz‐Zentrum Für Polar‐ und Meeresforschung Bremerhaven Germany Mikolajewicz, Uwe; 4 Max‐Planck‐Instiut Für Meteorologie Hamburg Germany Wang, Xuezhu; 3 Alfred‐Wegener‐Institut Helmholtz‐Zentrum Für Polar‐ und Meeresforschung Bremerhaven Germany |
author_facet |
Martin, Torge Biastoch, Arne Lohmann, Gerrit Mikolajewicz, Uwe Wang, Xuezhu Biastoch, Arne; 1 GEOMAR Helmholtz‐Zentrum Für Ozeanforschung Kiel Kiel Germany Lohmann, Gerrit; 3 Alfred‐Wegener‐Institut Helmholtz‐Zentrum Für Polar‐ und Meeresforschung Bremerhaven Germany Mikolajewicz, Uwe; 4 Max‐Planck‐Instiut Für Meteorologie Hamburg Germany Wang, Xuezhu; 3 Alfred‐Wegener‐Institut Helmholtz‐Zentrum Für Polar‐ und Meeresforschung Bremerhaven Germany |
author_sort |
Martin, Torge |
title |
On Timescales and Reversibility of the Ocean's Response to Enhanced Greenland Ice Sheet Melting in Comprehensive Climate Models |
title_short |
On Timescales and Reversibility of the Ocean's Response to Enhanced Greenland Ice Sheet Melting in Comprehensive Climate Models |
title_full |
On Timescales and Reversibility of the Ocean's Response to Enhanced Greenland Ice Sheet Melting in Comprehensive Climate Models |
title_fullStr |
On Timescales and Reversibility of the Ocean's Response to Enhanced Greenland Ice Sheet Melting in Comprehensive Climate Models |
title_full_unstemmed |
On Timescales and Reversibility of the Ocean's Response to Enhanced Greenland Ice Sheet Melting in Comprehensive Climate Models |
title_sort |
on timescales and reversibility of the ocean's response to enhanced greenland ice sheet melting in comprehensive climate models |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021GL097114 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9990 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet North Atlantic |
genre_facet |
Greenland Ice Sheet North Atlantic |
op_relation |
doi:10.1029/2021GL097114 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9990 |
op_rights |
This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1029/2021GL097114 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
5 |
_version_ |
1766016441403834368 |