Sea-level probability for the last deglaciation: A statistical analysis of far-field records
Pulses of ice-sheet meltwater into the world ocean during the last deglaciation are of great current interest, because these large-scale events offer important test-beds for numerical models of the responses of ocean circulation and climate to meltwater addition. The largest such event has become kn...
Published in: | Global and Planetary Change |
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Online Access: | http://hdl.handle.net/1885/78636 https://doi.org/10.1016/j.gloplacha.2010.11.002 https://openresearch-repository.anu.edu.au/bitstream/1885/78636/5/Rohling_E_2011_Sea-level_probability.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/78636/7/01_Stanford_Sea-level_probability_for_the_2011.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/78636 2024-01-14T10:07:46+01:00 Sea-level probability for the last deglaciation: A statistical analysis of far-field records Stanford, J D Hemingway, R. Rohling, Eelco Challenor, P.G. Medina-Elizalde, M Lester, A.J. http://hdl.handle.net/1885/78636 https://doi.org/10.1016/j.gloplacha.2010.11.002 https://openresearch-repository.anu.edu.au/bitstream/1885/78636/5/Rohling_E_2011_Sea-level_probability.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/78636/7/01_Stanford_Sea-level_probability_for_the_2011.pdf.jpg unknown Elsevier 0921-8181 http://hdl.handle.net/1885/78636 doi:10.1016/j.gloplacha.2010.11.002 https://openresearch-repository.anu.edu.au/bitstream/1885/78636/5/Rohling_E_2011_Sea-level_probability.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/78636/7/01_Stanford_Sea-level_probability_for_the_2011.pdf.jpg Global and Planetary Change Keywords: Confidence limit Data sets Deglacial Deglaciations Far-field Individual components Large-scale event Meltwater pulse Modelling studies MONTE CARLO Numerical models Ocean circulation Sea level rise World Ocean Younger Dryas Climate models S Deglaciation Sea-level Journal article ftanucanberra https://doi.org/10.1016/j.gloplacha.2010.11.002 2023-12-15T09:33:17Z Pulses of ice-sheet meltwater into the world ocean during the last deglaciation are of great current interest, because these large-scale events offer important test-beds for numerical models of the responses of ocean circulation and climate to meltwater addition. The largest such event has become known as meltwater pulse (mwp) 1a, with estimates of about 20. m of sea-level rise in about 500. years. A second meltwater pulse (mwp-1b) has been inferred from some sea-level records, but its existence has become debated following the presentation of additional records. Even the use of the more ubiquitous mwp-1a in modelling studies has been compromised by debate about its exact age, based upon perceived discrepancies between far-field sea-level records. It is clear that an objective investigation is needed to determine to what level inferred similarities and/or discrepancies between the various deglacial sea-level records are statistically rigorous (or not). For that purpose, we present a Monte Carlo style statistical analysis to determine the highest-probability sea-level history from six key far-field deglacial sea-level records, which fully accounts for realistic methodological and chronological uncertainties in all these records, and which is robust with respect to removal of individual component datasets. We find that sea-level rise started to accelerate into the deglaciation from around 17. ka. BP. Within the deglacial rise, there were two distinct increases; one at around the timing of the Bølling warming (14.6. ka. BP), and another, much broader, event that just post-dates the end of the Younger Dryas (11.3. ka. BP). We interpret these as mwp-1a and mwp-1b, respectively. We find that mwp-1a occurred between 14.3. ka. BP and 12.8. ka. BP. Highest rates of sea-level rise occurred at ~. 13.8. ka, probably (67% confidence) within the range of 100-130. cm/century, although values may have been as high as 260. cm/century (99% confidence limit). Mwp-1b is robustly expressed as a broad multi-millennial interval of ... Article in Journal/Newspaper Ice Sheet Australian National University: ANU Digital Collections Global and Planetary Change 79 3-4 193 203 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
topic |
Keywords: Confidence limit Data sets Deglacial Deglaciations Far-field Individual components Large-scale event Meltwater pulse Modelling studies MONTE CARLO Numerical models Ocean circulation Sea level rise World Ocean Younger Dryas Climate models S Deglaciation Sea-level |
spellingShingle |
Keywords: Confidence limit Data sets Deglacial Deglaciations Far-field Individual components Large-scale event Meltwater pulse Modelling studies MONTE CARLO Numerical models Ocean circulation Sea level rise World Ocean Younger Dryas Climate models S Deglaciation Sea-level Stanford, J D Hemingway, R. Rohling, Eelco Challenor, P.G. Medina-Elizalde, M Lester, A.J. Sea-level probability for the last deglaciation: A statistical analysis of far-field records |
topic_facet |
Keywords: Confidence limit Data sets Deglacial Deglaciations Far-field Individual components Large-scale event Meltwater pulse Modelling studies MONTE CARLO Numerical models Ocean circulation Sea level rise World Ocean Younger Dryas Climate models S Deglaciation Sea-level |
description |
Pulses of ice-sheet meltwater into the world ocean during the last deglaciation are of great current interest, because these large-scale events offer important test-beds for numerical models of the responses of ocean circulation and climate to meltwater addition. The largest such event has become known as meltwater pulse (mwp) 1a, with estimates of about 20. m of sea-level rise in about 500. years. A second meltwater pulse (mwp-1b) has been inferred from some sea-level records, but its existence has become debated following the presentation of additional records. Even the use of the more ubiquitous mwp-1a in modelling studies has been compromised by debate about its exact age, based upon perceived discrepancies between far-field sea-level records. It is clear that an objective investigation is needed to determine to what level inferred similarities and/or discrepancies between the various deglacial sea-level records are statistically rigorous (or not). For that purpose, we present a Monte Carlo style statistical analysis to determine the highest-probability sea-level history from six key far-field deglacial sea-level records, which fully accounts for realistic methodological and chronological uncertainties in all these records, and which is robust with respect to removal of individual component datasets. We find that sea-level rise started to accelerate into the deglaciation from around 17. ka. BP. Within the deglacial rise, there were two distinct increases; one at around the timing of the Bølling warming (14.6. ka. BP), and another, much broader, event that just post-dates the end of the Younger Dryas (11.3. ka. BP). We interpret these as mwp-1a and mwp-1b, respectively. We find that mwp-1a occurred between 14.3. ka. BP and 12.8. ka. BP. Highest rates of sea-level rise occurred at ~. 13.8. ka, probably (67% confidence) within the range of 100-130. cm/century, although values may have been as high as 260. cm/century (99% confidence limit). Mwp-1b is robustly expressed as a broad multi-millennial interval of ... |
format |
Article in Journal/Newspaper |
author |
Stanford, J D Hemingway, R. Rohling, Eelco Challenor, P.G. Medina-Elizalde, M Lester, A.J. |
author_facet |
Stanford, J D Hemingway, R. Rohling, Eelco Challenor, P.G. Medina-Elizalde, M Lester, A.J. |
author_sort |
Stanford, J D |
title |
Sea-level probability for the last deglaciation: A statistical analysis of far-field records |
title_short |
Sea-level probability for the last deglaciation: A statistical analysis of far-field records |
title_full |
Sea-level probability for the last deglaciation: A statistical analysis of far-field records |
title_fullStr |
Sea-level probability for the last deglaciation: A statistical analysis of far-field records |
title_full_unstemmed |
Sea-level probability for the last deglaciation: A statistical analysis of far-field records |
title_sort |
sea-level probability for the last deglaciation: a statistical analysis of far-field records |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/78636 https://doi.org/10.1016/j.gloplacha.2010.11.002 https://openresearch-repository.anu.edu.au/bitstream/1885/78636/5/Rohling_E_2011_Sea-level_probability.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/78636/7/01_Stanford_Sea-level_probability_for_the_2011.pdf.jpg |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Global and Planetary Change |
op_relation |
0921-8181 http://hdl.handle.net/1885/78636 doi:10.1016/j.gloplacha.2010.11.002 https://openresearch-repository.anu.edu.au/bitstream/1885/78636/5/Rohling_E_2011_Sea-level_probability.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/78636/7/01_Stanford_Sea-level_probability_for_the_2011.pdf.jpg |
op_doi |
https://doi.org/10.1016/j.gloplacha.2010.11.002 |
container_title |
Global and Planetary Change |
container_volume |
79 |
container_issue |
3-4 |
container_start_page |
193 |
op_container_end_page |
203 |
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1788062157330448384 |