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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Online Access: | https://doi.org/10.5194/esd-13-1417-2022 https://doaj.org/article/943521c9ae4c483b8b27c2e4f69a2d5e |
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ftdoajarticles:oai:doaj.org/article:943521c9ae4c483b8b27c2e4f69a2d5e 2023-05-15T14:01:09+02:00 Process-based estimate of global-mean sea-level changes in the Common Era N. Gangadharan H. Goosse D. Parkes H. Goelzer F. Maussion B. Marzeion 2022-10-01T00:00:00Z https://doi.org/10.5194/esd-13-1417-2022 https://doaj.org/article/943521c9ae4c483b8b27c2e4f69a2d5e EN eng Copernicus Publications https://esd.copernicus.org/articles/13/1417/2022/esd-13-1417-2022.pdf https://doaj.org/toc/2190-4979 https://doaj.org/toc/2190-4987 doi:10.5194/esd-13-1417-2022 2190-4979 2190-4987 https://doaj.org/article/943521c9ae4c483b8b27c2e4f69a2d5e Earth System Dynamics, Vol 13, Pp 1417-1435 (2022) Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 article 2022 ftdoajarticles https://doi.org/10.5194/esd-13-1417-2022 2022-12-30T19:49:35Z 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. Article in Journal/Newspaper Antarc* Antarctic glacier Greenland Ice Sheet Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Greenland Earth System Dynamics 13 4 1417 1435 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 |
spellingShingle |
Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 N. Gangadharan H. Goosse D. Parkes H. Goelzer F. Maussion B. Marzeion Process-based estimate of global-mean sea-level changes in the Common Era |
topic_facet |
Science Q Geology QE1-996.5 Dynamic and structural geology QE500-639.5 |
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. |
format |
Article in Journal/Newspaper |
author |
N. Gangadharan H. Goosse D. Parkes H. Goelzer F. Maussion B. Marzeion |
author_facet |
N. Gangadharan H. Goosse D. Parkes H. Goelzer F. Maussion B. Marzeion |
author_sort |
N. Gangadharan |
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 |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/esd-13-1417-2022 https://doaj.org/article/943521c9ae4c483b8b27c2e4f69a2d5e |
geographic |
Antarctic The Antarctic Greenland |
geographic_facet |
Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic glacier Greenland Ice Sheet |
genre_facet |
Antarc* Antarctic glacier Greenland Ice Sheet |
op_source |
Earth System Dynamics, Vol 13, Pp 1417-1435 (2022) |
op_relation |
https://esd.copernicus.org/articles/13/1417/2022/esd-13-1417-2022.pdf https://doaj.org/toc/2190-4979 https://doaj.org/toc/2190-4987 doi:10.5194/esd-13-1417-2022 2190-4979 2190-4987 https://doaj.org/article/943521c9ae4c483b8b27c2e4f69a2d5e |
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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