Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions
peer reviewed Combined records of snow accumulation rate, δ18O and deuterium excess were produced from several shallow ice cores and snow pits at NEEM (North Greenland Eemian Ice Drilling), covering the period from 1724 to 2007. They are used to investigate recent climate variability and characteris...
Published in: | The Cryosphere |
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Language: | English |
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Online Access: | https://orbi.uliege.be/handle/2268/184984 https://orbi.uliege.be/bitstream/2268/184984/1/tc-9-1481-2015.pdf https://doi.org/10.5194/tc-9-1481-2015 |
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ftorbi:oai:orbi.ulg.ac.be:2268/184984 2024-04-21T08:03:41+00:00 Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions Masson-Delmotte, V. Steen-Larsen, H. Ortega, P. Swingedouw, D. Popp, T. Vinther, B. Oerter, H. Sveinbjornsdottir, A. Gudlaugsdottir, H. Box, J. Falourd, S. Fettweis, Xavier Gallée, H. Garnier, E. Gkinis, V. Jouzel, J. Landais, A. Minster, B. Paradis, N. Orsi, A. Risi, C. Werner, M. White, J. 2015-08-06 https://orbi.uliege.be/handle/2268/184984 https://orbi.uliege.be/bitstream/2268/184984/1/tc-9-1481-2015.pdf https://doi.org/10.5194/tc-9-1481-2015 en eng Copernicus http://www.the-cryosphere.net/9/1481/2015/tc-9-1481-2015.html urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/184984 info:hdl:2268/184984 https://orbi.uliege.be/bitstream/2268/184984/1/tc-9-1481-2015.pdf doi:10.5194/tc-9-1481-2015 scopus-id:2-s2.0-84938819733 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess The Cryosphere, 9, 1481-1504 (2015-08-06) Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2015 ftorbi https://doi.org/10.5194/tc-9-1481-2015 2024-03-27T14:58:15Z peer reviewed Combined records of snow accumulation rate, δ18O and deuterium excess were produced from several shallow ice cores and snow pits at NEEM (North Greenland Eemian Ice Drilling), covering the period from 1724 to 2007. They are used to investigate recent climate variability and characterise the isotope–temperature relationship. We find that NEEM records are only weakly affected by inter-annual changes in the North Atlantic Oscillation. Decadal δ18O and accumulation variability is related to North Atlantic sea surface temperature and is enhanced at the beginning of the 19th century. No long-term trend is observed in the accumulation record. By contrast, NEEM δ18O shows multidecadal increasing trends in the late 19th century and since the 1980s. The strongest annual positive δ18O values are recorded at NEEM in 1928 and 2010, while maximum accumulation occurs in 1933. The last decade is the most enriched in δ18O (warmest), while the 11-year periods with the strongest depletion (coldest) are depicted at NEEM in 1815–1825 and 1836–1846, which are also the driest 11-year periods. The NEEM accumulation and δ18O records are strongly correlated with outputs from atmospheric models, nudged to atmospheric reanalyses. Best performance is observed for ERA reanalyses. Gridded temperature reconstructions, instrumental data and model outputs at NEEM are used to estimate the multidecadal accumulation–temperature and δ18O–temperature relationships for the strong warming period in 1979–2007. The accumulation sensitivity to temperature is estimated at 11 ± 2 % °C−1 and the δ18O–temperature slope at 1.1 ± 0.2 ‰ °C−1, about twice as large as previously used to estimate last interglacial temperature change from the bottom part of the NEEM deep ice core. Article in Journal/Newspaper Greenland ice core North Atlantic North Atlantic oscillation North Greenland The Cryosphere University of Liège: ORBi (Open Repository and Bibliography) The Cryosphere 9 4 1481 1504 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Masson-Delmotte, V. Steen-Larsen, H. Ortega, P. Swingedouw, D. Popp, T. Vinther, B. Oerter, H. Sveinbjornsdottir, A. Gudlaugsdottir, H. Box, J. Falourd, S. Fettweis, Xavier Gallée, H. Garnier, E. Gkinis, V. Jouzel, J. Landais, A. Minster, B. Paradis, N. Orsi, A. Risi, C. Werner, M. White, J. Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions |
topic_facet |
Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed Combined records of snow accumulation rate, δ18O and deuterium excess were produced from several shallow ice cores and snow pits at NEEM (North Greenland Eemian Ice Drilling), covering the period from 1724 to 2007. They are used to investigate recent climate variability and characterise the isotope–temperature relationship. We find that NEEM records are only weakly affected by inter-annual changes in the North Atlantic Oscillation. Decadal δ18O and accumulation variability is related to North Atlantic sea surface temperature and is enhanced at the beginning of the 19th century. No long-term trend is observed in the accumulation record. By contrast, NEEM δ18O shows multidecadal increasing trends in the late 19th century and since the 1980s. The strongest annual positive δ18O values are recorded at NEEM in 1928 and 2010, while maximum accumulation occurs in 1933. The last decade is the most enriched in δ18O (warmest), while the 11-year periods with the strongest depletion (coldest) are depicted at NEEM in 1815–1825 and 1836–1846, which are also the driest 11-year periods. The NEEM accumulation and δ18O records are strongly correlated with outputs from atmospheric models, nudged to atmospheric reanalyses. Best performance is observed for ERA reanalyses. Gridded temperature reconstructions, instrumental data and model outputs at NEEM are used to estimate the multidecadal accumulation–temperature and δ18O–temperature relationships for the strong warming period in 1979–2007. The accumulation sensitivity to temperature is estimated at 11 ± 2 % °C−1 and the δ18O–temperature slope at 1.1 ± 0.2 ‰ °C−1, about twice as large as previously used to estimate last interglacial temperature change from the bottom part of the NEEM deep ice core. |
format |
Article in Journal/Newspaper |
author |
Masson-Delmotte, V. Steen-Larsen, H. Ortega, P. Swingedouw, D. Popp, T. Vinther, B. Oerter, H. Sveinbjornsdottir, A. Gudlaugsdottir, H. Box, J. Falourd, S. Fettweis, Xavier Gallée, H. Garnier, E. Gkinis, V. Jouzel, J. Landais, A. Minster, B. Paradis, N. Orsi, A. Risi, C. Werner, M. White, J. |
author_facet |
Masson-Delmotte, V. Steen-Larsen, H. Ortega, P. Swingedouw, D. Popp, T. Vinther, B. Oerter, H. Sveinbjornsdottir, A. Gudlaugsdottir, H. Box, J. Falourd, S. Fettweis, Xavier Gallée, H. Garnier, E. Gkinis, V. Jouzel, J. Landais, A. Minster, B. Paradis, N. Orsi, A. Risi, C. Werner, M. White, J. |
author_sort |
Masson-Delmotte, V. |
title |
Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions |
title_short |
Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions |
title_full |
Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions |
title_fullStr |
Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions |
title_full_unstemmed |
Recent changes in north-west Greenland climate documented by NEEM shallow ice core data and simulations, and implications for past-temperature reconstructions |
title_sort |
recent changes in north-west greenland climate documented by neem shallow ice core data and simulations, and implications for past-temperature reconstructions |
publisher |
Copernicus |
publishDate |
2015 |
url |
https://orbi.uliege.be/handle/2268/184984 https://orbi.uliege.be/bitstream/2268/184984/1/tc-9-1481-2015.pdf https://doi.org/10.5194/tc-9-1481-2015 |
genre |
Greenland ice core North Atlantic North Atlantic oscillation North Greenland The Cryosphere |
genre_facet |
Greenland ice core North Atlantic North Atlantic oscillation North Greenland The Cryosphere |
op_source |
The Cryosphere, 9, 1481-1504 (2015-08-06) |
op_relation |
http://www.the-cryosphere.net/9/1481/2015/tc-9-1481-2015.html urn:issn:1994-0416 urn:issn:1994-0424 https://orbi.uliege.be/handle/2268/184984 info:hdl:2268/184984 https://orbi.uliege.be/bitstream/2268/184984/1/tc-9-1481-2015.pdf doi:10.5194/tc-9-1481-2015 scopus-id:2-s2.0-84938819733 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-9-1481-2015 |
container_title |
The Cryosphere |
container_volume |
9 |
container_issue |
4 |
container_start_page |
1481 |
op_container_end_page |
1504 |
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1796943438966423552 |