Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores
This study presents simulations of Greenland surface melt for the Eemian interglacial period (∼130 000 to 115 000 years ago) derived from regional climate simulations with a coupled surface energy balance model. Surface melt is of high relevance due to its potential effect on ice core observations,...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:bfff0cdda6a54754a4a4519ac668ac53 2023-05-15T16:03:05+02:00 Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores A. Plach B. M. Vinther K. H. Nisancioglu S. Vudayagiri T. Blunier 2021-01-01 https://doi.org/10.5194/cp-17-317-2021 https://cp.copernicus.org/articles/17/317/2021/cp-17-317-2021.pdf https://doaj.org/article/bfff0cdda6a54754a4a4519ac668ac53 en eng Copernicus Publications doi:10.5194/cp-17-317-2021 1814-9324 1814-9332 https://cp.copernicus.org/articles/17/317/2021/cp-17-317-2021.pdf https://doaj.org/article/bfff0cdda6a54754a4a4519ac668ac53 undefined Climate of the Past, Vol 17, Pp 317-330 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/cp-17-317-2021 2023-01-22T18:58:20Z This study presents simulations of Greenland surface melt for the Eemian interglacial period (∼130 000 to 115 000 years ago) derived from regional climate simulations with a coupled surface energy balance model. Surface melt is of high relevance due to its potential effect on ice core observations, e.g., lowering the preserved total air content (TAC) used to infer past surface elevation. An investigation of surface melt is particularly interesting for warm periods with high surface melt, such as the Eemian interglacial period. Furthermore, Eemian ice is the deepest and most compressed ice preserved on Greenland, resulting in our inability to identify melt layers visually. Therefore, simulating Eemian melt rates and associated melt layers is beneficial to improve the reconstruction of past surface elevation. Estimated TAC, based on simulated melt during the Eemian, could explain the lower TAC observations. The simulations show Eemian surface melt at all deep Greenland ice core locations and an average of up to ∼30 melt days per year at Dye-3, corresponding to more than 600 mm water equivalent (w.e.) of annual melt. For higher ice sheet locations, between 60 and 150 mmw.e.yr-1 on average are simulated. At the summit of Greenland, this yields a refreezing ratio of more than 25 % of the annual accumulation. As a consequence, high melt rates during warm periods should be considered when interpreting Greenland TAC fluctuations as surface elevation changes. In addition to estimating the influence of melt on past TAC in ice cores, the simulated surface melt could potentially be used to identify coring locations where Greenland ice is best preserved. Article in Journal/Newspaper Dye 3 Dye-3 Greenland Greenland ice core ice core Ice Sheet Unknown Greenland Tac ENVELOPE(-59.517,-59.517,-62.500,-62.500) Climate of the Past 17 1 317 330 |
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English |
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geo envir A. Plach B. M. Vinther K. H. Nisancioglu S. Vudayagiri T. Blunier Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores |
topic_facet |
geo envir |
description |
This study presents simulations of Greenland surface melt for the Eemian interglacial period (∼130 000 to 115 000 years ago) derived from regional climate simulations with a coupled surface energy balance model. Surface melt is of high relevance due to its potential effect on ice core observations, e.g., lowering the preserved total air content (TAC) used to infer past surface elevation. An investigation of surface melt is particularly interesting for warm periods with high surface melt, such as the Eemian interglacial period. Furthermore, Eemian ice is the deepest and most compressed ice preserved on Greenland, resulting in our inability to identify melt layers visually. Therefore, simulating Eemian melt rates and associated melt layers is beneficial to improve the reconstruction of past surface elevation. Estimated TAC, based on simulated melt during the Eemian, could explain the lower TAC observations. The simulations show Eemian surface melt at all deep Greenland ice core locations and an average of up to ∼30 melt days per year at Dye-3, corresponding to more than 600 mm water equivalent (w.e.) of annual melt. For higher ice sheet locations, between 60 and 150 mmw.e.yr-1 on average are simulated. At the summit of Greenland, this yields a refreezing ratio of more than 25 % of the annual accumulation. As a consequence, high melt rates during warm periods should be considered when interpreting Greenland TAC fluctuations as surface elevation changes. In addition to estimating the influence of melt on past TAC in ice cores, the simulated surface melt could potentially be used to identify coring locations where Greenland ice is best preserved. |
format |
Article in Journal/Newspaper |
author |
A. Plach B. M. Vinther K. H. Nisancioglu S. Vudayagiri T. Blunier |
author_facet |
A. Plach B. M. Vinther K. H. Nisancioglu S. Vudayagiri T. Blunier |
author_sort |
A. Plach |
title |
Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores |
title_short |
Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores |
title_full |
Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores |
title_fullStr |
Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores |
title_full_unstemmed |
Greenland climate simulations show high Eemian surface melt which could explain reduced total air content in ice cores |
title_sort |
greenland climate simulations show high eemian surface melt which could explain reduced total air content in ice cores |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/cp-17-317-2021 https://cp.copernicus.org/articles/17/317/2021/cp-17-317-2021.pdf https://doaj.org/article/bfff0cdda6a54754a4a4519ac668ac53 |
long_lat |
ENVELOPE(-59.517,-59.517,-62.500,-62.500) |
geographic |
Greenland Tac |
geographic_facet |
Greenland Tac |
genre |
Dye 3 Dye-3 Greenland Greenland ice core ice core Ice Sheet |
genre_facet |
Dye 3 Dye-3 Greenland Greenland ice core ice core Ice Sheet |
op_source |
Climate of the Past, Vol 17, Pp 317-330 (2021) |
op_relation |
doi:10.5194/cp-17-317-2021 1814-9324 1814-9332 https://cp.copernicus.org/articles/17/317/2021/cp-17-317-2021.pdf https://doaj.org/article/bfff0cdda6a54754a4a4519ac668ac53 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-17-317-2021 |
container_title |
Climate of the Past |
container_volume |
17 |
container_issue |
1 |
container_start_page |
317 |
op_container_end_page |
330 |
_version_ |
1766398724460773376 |