Process-based estimate of global-mean sea-level changes in the Common Era
Although the global-mean sea level (GMSL) rose over the twentieth century with a positive contribution from thermosteric and barystatic (ice sheets and glaciers) sources, the driving processes of GMSL changes during the pre-industrial Common Era (PCE; 1–1850 CE) are largely unknown. Here, the contri...
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ftnorce:oai:norceresearch.brage.unit.no:11250/3090733 2023-10-25T01:31:23+02:00 Process-based estimate of global-mean sea-level changes in the Common Era Gangadharan, Nidheesh Goosse, Hugues Parkes, David C. Goelzer, Heiko Maussion, Fabien Marzeion, Ben 2022 application/pdf https://hdl.handle.net/11250/3090733 https://doi.org/10.5194/esd-13-1417-2022 eng eng Sigma2: NS9560K Sigma2: NS8006K Sigma2: NS5011K Norges forskningsråd: 295046 Sigma2: NN9560K Norges forskningsråd: 270061 Sigma2: NN8006K Norges forskningsråd: 324639 Earth System Dynamics (ESD). 2022, 13 (4), 1417-1435. urn:issn:2190-4979 https://hdl.handle.net/11250/3090733 https://doi.org/10.5194/esd-13-1417-2022 cristin:2068245 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © Author(s) 2022 Earth System Dynamics (ESD) 13 4 1417-1435 Havnivå Sea level Klimadynamikk Climate dynamics VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 Journal article Peer reviewed 2022 ftnorce https://doi.org/10.5194/esd-13-1417-2022 2023-09-27T22:49:50Z Although the global-mean sea level (GMSL) rose over the twentieth century with a positive contribution from thermosteric and barystatic (ice sheets and glaciers) sources, the driving processes of GMSL changes during the pre-industrial Common Era (PCE; 1–1850 CE) are largely unknown. Here, the contributions of glacier and ice sheet mass variations and ocean thermal expansion to GMSL in the Common Era (1–2000 CE) are estimated based on simulations with different physical models. Although the twentieth century global-mean thermosteric sea level (GMTSL) is mainly associated with temperature variations in the upper 700 m (86 % in reconstruction and 74 ± 8 % in model), GMTSL in the PCE is equally controlled by temperature changes below 700 m. The GMTSL does not vary more than ±2 cm during the PCE. GMSL contributions from the Antarctic and Greenland ice sheets tend to cancel each other out during the PCE owing to the differing response of the two ice sheets to atmospheric conditions. The uncertainties of sea-level contribution from land-ice mass variations are large, especially over the first millennium. Despite underestimating the twentieth century model GMSL, there is a general agreement between the model and proxy-based GMSL reconstructions in the CE. Although the uncertainties remain large over the first millennium, model simulations point to glaciers as the dominant source of GMSL changes during the PCE. publishedVersion Article in Journal/Newspaper Antarc* Antarctic glacier Greenland Ice Sheet NORCE vitenarkiv (Norwegian Research Centre) Antarctic Greenland The Antarctic Earth System Dynamics 13 4 1417 1435 |
institution |
Open Polar |
collection |
NORCE vitenarkiv (Norwegian Research Centre) |
op_collection_id |
ftnorce |
language |
English |
topic |
Havnivå Sea level Klimadynamikk Climate dynamics VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 |
spellingShingle |
Havnivå Sea level Klimadynamikk Climate dynamics VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 Gangadharan, Nidheesh Goosse, Hugues Parkes, David C. Goelzer, Heiko Maussion, Fabien Marzeion, Ben Process-based estimate of global-mean sea-level changes in the Common Era |
topic_facet |
Havnivå Sea level Klimadynamikk Climate dynamics VDP::Matematikk og naturvitenskap: 400 VDP::Mathematics and natural scienses: 400 |
description |
Although the global-mean sea level (GMSL) rose over the twentieth century with a positive contribution from thermosteric and barystatic (ice sheets and glaciers) sources, the driving processes of GMSL changes during the pre-industrial Common Era (PCE; 1–1850 CE) are largely unknown. Here, the contributions of glacier and ice sheet mass variations and ocean thermal expansion to GMSL in the Common Era (1–2000 CE) are estimated based on simulations with different physical models. Although the twentieth century global-mean thermosteric sea level (GMTSL) is mainly associated with temperature variations in the upper 700 m (86 % in reconstruction and 74 ± 8 % in model), GMTSL in the PCE is equally controlled by temperature changes below 700 m. The GMTSL does not vary more than ±2 cm during the PCE. GMSL contributions from the Antarctic and Greenland ice sheets tend to cancel each other out during the PCE owing to the differing response of the two ice sheets to atmospheric conditions. The uncertainties of sea-level contribution from land-ice mass variations are large, especially over the first millennium. Despite underestimating the twentieth century model GMSL, there is a general agreement between the model and proxy-based GMSL reconstructions in the CE. Although the uncertainties remain large over the first millennium, model simulations point to glaciers as the dominant source of GMSL changes during the PCE. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Gangadharan, Nidheesh Goosse, Hugues Parkes, David C. Goelzer, Heiko Maussion, Fabien Marzeion, Ben |
author_facet |
Gangadharan, Nidheesh Goosse, Hugues Parkes, David C. Goelzer, Heiko Maussion, Fabien Marzeion, Ben |
author_sort |
Gangadharan, Nidheesh |
title |
Process-based estimate of global-mean sea-level changes in the Common Era |
title_short |
Process-based estimate of global-mean sea-level changes in the Common Era |
title_full |
Process-based estimate of global-mean sea-level changes in the Common Era |
title_fullStr |
Process-based estimate of global-mean sea-level changes in the Common Era |
title_full_unstemmed |
Process-based estimate of global-mean sea-level changes in the Common Era |
title_sort |
process-based estimate of global-mean sea-level changes in the common era |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3090733 https://doi.org/10.5194/esd-13-1417-2022 |
geographic |
Antarctic Greenland The Antarctic |
geographic_facet |
Antarctic Greenland The Antarctic |
genre |
Antarc* Antarctic glacier Greenland Ice Sheet |
genre_facet |
Antarc* Antarctic glacier Greenland Ice Sheet |
op_source |
Earth System Dynamics (ESD) 13 4 1417-1435 |
op_relation |
Sigma2: NS9560K Sigma2: NS8006K Sigma2: NS5011K Norges forskningsråd: 295046 Sigma2: NN9560K Norges forskningsråd: 270061 Sigma2: NN8006K Norges forskningsråd: 324639 Earth System Dynamics (ESD). 2022, 13 (4), 1417-1435. urn:issn:2190-4979 https://hdl.handle.net/11250/3090733 https://doi.org/10.5194/esd-13-1417-2022 cristin:2068245 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © Author(s) 2022 |
op_doi |
https://doi.org/10.5194/esd-13-1417-2022 |
container_title |
Earth System Dynamics |
container_volume |
13 |
container_issue |
4 |
container_start_page |
1417 |
op_container_end_page |
1435 |
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1780726874957152256 |