Missing sea level rise in southeastern Greenland during and since the Little Ice Age
The Greenland Ice Sheet has been losing mass at an accelerating rate over the past 2 decades. Understanding ice mass and glacier changes during the preceding several hundred years prior to geodetic measurements is more difficult because evidence of past ice extent in many places was later overridden...
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Copernicus Publications
2023
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Online Access: | https://doi.org/10.5194/cp-19-1585-2023 https://doaj.org/article/752f8d6c33a146a1be97be6383dcffb8 |
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ftdoajarticles:oai:doaj.org/article:752f8d6c33a146a1be97be6383dcffb8 2023-08-27T04:04:20+02:00 Missing sea level rise in southeastern Greenland during and since the Little Ice Age S. A. Woodroffe L. M. Wake K. K. Kjeldsen N. L. M. Barlow A. J. Long K. H. Kjær 2023-08-01T00:00:00Z https://doi.org/10.5194/cp-19-1585-2023 https://doaj.org/article/752f8d6c33a146a1be97be6383dcffb8 EN eng Copernicus Publications https://cp.copernicus.org/articles/19/1585/2023/cp-19-1585-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-1585-2023 1814-9324 1814-9332 https://doaj.org/article/752f8d6c33a146a1be97be6383dcffb8 Climate of the Past, Vol 19, Pp 1585-1606 (2023) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.5194/cp-19-1585-2023 2023-08-06T00:43:26Z The Greenland Ice Sheet has been losing mass at an accelerating rate over the past 2 decades. Understanding ice mass and glacier changes during the preceding several hundred years prior to geodetic measurements is more difficult because evidence of past ice extent in many places was later overridden. Salt marshes provide the only continuous records of relative sea level (RSL) from close to the Greenland Ice Sheet that span the period of time during and since the Little Ice Age (LIA) and can be used to reconstruct ice mass gain and loss over recent centuries. Salt marsh sediments collected at the mouth of Dronning Marie Dal, close to the Greenland Ice Sheet margin in southeastern Greenland, record RSL changes over the past ca. 300 years through changing sediment and diatom stratigraphy. These RSL changes record a combination of processes that are dominated by local and regional changes in Greenland Ice Sheet mass balance during this critical period that spans the maximum of the LIA and 20th-century warming. In the early part of the record (1725–1762 CE) the rate of RSL rise is higher than reconstructed from the closest isolation basin at Timmiarmiut, but between 1762 and 1880 CE the RSL rate is within the error range of the rate of RSL change recorded in the isolation basin. RSL begins to slowly fall around 1880 CE, with a total amount of RSL fall of 0.09±0.1 m in the last 140 years. Modelled RSL, which takes into account contributions from post-LIA Greenland Ice Sheet glacio-isostatic adjustment (GIA), ongoing deglacial GIA, the global non-ice sheet glacial melt fingerprint, contributions from thermosteric effects, the Antarctic mass loss sea level fingerprint and terrestrial water storage, overpredicts the amount of RSL fall since the end of the LIA by at least 0.5 m. The GIA signal caused by post-LIA Greenland Ice Sheet mass loss is by far the largest contributor to this modelled RSL, and error in its calculation has a large impact on RSL predictions at Dronning Marie Dal. We cannot reconcile the modelled RSL ... Article in Journal/Newspaper Antarc* Antarctic glacier Greenland Ice Sheet Directory of Open Access Journals: DOAJ Articles Antarctic Dronning Marie Dal ENVELOPE(-42.000,-42.000,63.467,63.467) Greenland The Antarctic Timmiarmiut ENVELOPE(-42.217,-42.217,62.533,62.533) Climate of the Past 19 8 1585 1606 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 S. A. Woodroffe L. M. Wake K. K. Kjeldsen N. L. M. Barlow A. J. Long K. H. Kjær Missing sea level rise in southeastern Greenland during and since the Little Ice Age |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
The Greenland Ice Sheet has been losing mass at an accelerating rate over the past 2 decades. Understanding ice mass and glacier changes during the preceding several hundred years prior to geodetic measurements is more difficult because evidence of past ice extent in many places was later overridden. Salt marshes provide the only continuous records of relative sea level (RSL) from close to the Greenland Ice Sheet that span the period of time during and since the Little Ice Age (LIA) and can be used to reconstruct ice mass gain and loss over recent centuries. Salt marsh sediments collected at the mouth of Dronning Marie Dal, close to the Greenland Ice Sheet margin in southeastern Greenland, record RSL changes over the past ca. 300 years through changing sediment and diatom stratigraphy. These RSL changes record a combination of processes that are dominated by local and regional changes in Greenland Ice Sheet mass balance during this critical period that spans the maximum of the LIA and 20th-century warming. In the early part of the record (1725–1762 CE) the rate of RSL rise is higher than reconstructed from the closest isolation basin at Timmiarmiut, but between 1762 and 1880 CE the RSL rate is within the error range of the rate of RSL change recorded in the isolation basin. RSL begins to slowly fall around 1880 CE, with a total amount of RSL fall of 0.09±0.1 m in the last 140 years. Modelled RSL, which takes into account contributions from post-LIA Greenland Ice Sheet glacio-isostatic adjustment (GIA), ongoing deglacial GIA, the global non-ice sheet glacial melt fingerprint, contributions from thermosteric effects, the Antarctic mass loss sea level fingerprint and terrestrial water storage, overpredicts the amount of RSL fall since the end of the LIA by at least 0.5 m. The GIA signal caused by post-LIA Greenland Ice Sheet mass loss is by far the largest contributor to this modelled RSL, and error in its calculation has a large impact on RSL predictions at Dronning Marie Dal. We cannot reconcile the modelled RSL ... |
format |
Article in Journal/Newspaper |
author |
S. A. Woodroffe L. M. Wake K. K. Kjeldsen N. L. M. Barlow A. J. Long K. H. Kjær |
author_facet |
S. A. Woodroffe L. M. Wake K. K. Kjeldsen N. L. M. Barlow A. J. Long K. H. Kjær |
author_sort |
S. A. Woodroffe |
title |
Missing sea level rise in southeastern Greenland during and since the Little Ice Age |
title_short |
Missing sea level rise in southeastern Greenland during and since the Little Ice Age |
title_full |
Missing sea level rise in southeastern Greenland during and since the Little Ice Age |
title_fullStr |
Missing sea level rise in southeastern Greenland during and since the Little Ice Age |
title_full_unstemmed |
Missing sea level rise in southeastern Greenland during and since the Little Ice Age |
title_sort |
missing sea level rise in southeastern greenland during and since the little ice age |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/cp-19-1585-2023 https://doaj.org/article/752f8d6c33a146a1be97be6383dcffb8 |
long_lat |
ENVELOPE(-42.000,-42.000,63.467,63.467) ENVELOPE(-42.217,-42.217,62.533,62.533) |
geographic |
Antarctic Dronning Marie Dal Greenland The Antarctic Timmiarmiut |
geographic_facet |
Antarctic Dronning Marie Dal Greenland The Antarctic Timmiarmiut |
genre |
Antarc* Antarctic glacier Greenland Ice Sheet |
genre_facet |
Antarc* Antarctic glacier Greenland Ice Sheet |
op_source |
Climate of the Past, Vol 19, Pp 1585-1606 (2023) |
op_relation |
https://cp.copernicus.org/articles/19/1585/2023/cp-19-1585-2023.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-19-1585-2023 1814-9324 1814-9332 https://doaj.org/article/752f8d6c33a146a1be97be6383dcffb8 |
op_doi |
https://doi.org/10.5194/cp-19-1585-2023 |
container_title |
Climate of the Past |
container_volume |
19 |
container_issue |
8 |
container_start_page |
1585 |
op_container_end_page |
1606 |
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1775350711835426816 |