Spatial gradients of temperature, accumulation and δ 18 O-ice in Greenland over a series of Dansgaard–Oeschger events
Air and water stable isotope measurements from four Greenland deep ice cores (GRIP, GISP2, NGRIP and NEEM) are investigated over a series of Dansgaard–Oeschger events (DO 8, 9 and 10), which are representative of glacial millennial scale variability. Combined with firn modeling, air isotope data all...
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ftdoajarticles:oai:doaj.org/article:8b7efe63277c4126afecb3bf1cdd4a2b 2023-05-15T16:00:00+02:00 Spatial gradients of temperature, accumulation and δ 18 O-ice in Greenland over a series of Dansgaard–Oeschger events M. Guillevic L. Bazin A. Landais P. Kindler A. Orsi V. Masson-Delmotte T. Blunier S. L. Buchardt E. Capron M. Leuenberger P. Martinerie F. Prié B. M. Vinther 2013-05-01T00:00:00Z https://doi.org/10.5194/cp-9-1029-2013 https://doaj.org/article/8b7efe63277c4126afecb3bf1cdd4a2b EN eng Copernicus Publications http://www.clim-past.net/9/1029/2013/cp-9-1029-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-1029-2013 1814-9324 1814-9332 https://doaj.org/article/8b7efe63277c4126afecb3bf1cdd4a2b Climate of the Past, Vol 9, Iss 3, Pp 1029-1051 (2013) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2013 ftdoajarticles https://doi.org/10.5194/cp-9-1029-2013 2022-12-31T04:43:23Z Air and water stable isotope measurements from four Greenland deep ice cores (GRIP, GISP2, NGRIP and NEEM) are investigated over a series of Dansgaard–Oeschger events (DO 8, 9 and 10), which are representative of glacial millennial scale variability. Combined with firn modeling, air isotope data allow us to quantify abrupt temperature increases for each drill site (1σ = 0.6 °C for NEEM, GRIP and GISP2, 1.5 °C for NGRIP). Our data show that the magnitude of stadial–interstadial temperature increase is up to 2 °C larger in central and North Greenland than in northwest Greenland: i.e., for DO 8, a magnitude of +8.8 °C is inferred, which is significantly smaller than the +11.1 °C inferred at GISP2. The same spatial pattern is seen for accumulation increases. This pattern is coherent with climate simulations in response to reduced sea-ice extent in the Nordic seas. The temporal water isotope (δ 18 O)–temperature relationship varies between 0.3 and 0.6 (±0.08) ‰ °C −1 and is systematically larger at NEEM, possibly due to limited changes in precipitation seasonality compared to GISP2, GRIP or NGRIP. The gas age−ice age difference of warming events represented in water and air isotopes can only be modeled when assuming a 26% (NGRIP) to 40% (GRIP) lower accumulation than that derived from a Dansgaard–Johnsen ice flow model. Article in Journal/Newspaper Dansgaard-Oeschger events Greenland GRIP NGRIP Nordic Seas North Greenland Sea ice Directory of Open Access Journals: DOAJ Articles Greenland Climate of the Past 9 3 1029 1051 |
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Open Polar |
collection |
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 M. Guillevic L. Bazin A. Landais P. Kindler A. Orsi V. Masson-Delmotte T. Blunier S. L. Buchardt E. Capron M. Leuenberger P. Martinerie F. Prié B. M. Vinther Spatial gradients of temperature, accumulation and δ 18 O-ice in Greenland over a series of Dansgaard–Oeschger events |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Air and water stable isotope measurements from four Greenland deep ice cores (GRIP, GISP2, NGRIP and NEEM) are investigated over a series of Dansgaard–Oeschger events (DO 8, 9 and 10), which are representative of glacial millennial scale variability. Combined with firn modeling, air isotope data allow us to quantify abrupt temperature increases for each drill site (1σ = 0.6 °C for NEEM, GRIP and GISP2, 1.5 °C for NGRIP). Our data show that the magnitude of stadial–interstadial temperature increase is up to 2 °C larger in central and North Greenland than in northwest Greenland: i.e., for DO 8, a magnitude of +8.8 °C is inferred, which is significantly smaller than the +11.1 °C inferred at GISP2. The same spatial pattern is seen for accumulation increases. This pattern is coherent with climate simulations in response to reduced sea-ice extent in the Nordic seas. The temporal water isotope (δ 18 O)–temperature relationship varies between 0.3 and 0.6 (±0.08) ‰ °C −1 and is systematically larger at NEEM, possibly due to limited changes in precipitation seasonality compared to GISP2, GRIP or NGRIP. The gas age−ice age difference of warming events represented in water and air isotopes can only be modeled when assuming a 26% (NGRIP) to 40% (GRIP) lower accumulation than that derived from a Dansgaard–Johnsen ice flow model. |
format |
Article in Journal/Newspaper |
author |
M. Guillevic L. Bazin A. Landais P. Kindler A. Orsi V. Masson-Delmotte T. Blunier S. L. Buchardt E. Capron M. Leuenberger P. Martinerie F. Prié B. M. Vinther |
author_facet |
M. Guillevic L. Bazin A. Landais P. Kindler A. Orsi V. Masson-Delmotte T. Blunier S. L. Buchardt E. Capron M. Leuenberger P. Martinerie F. Prié B. M. Vinther |
author_sort |
M. Guillevic |
title |
Spatial gradients of temperature, accumulation and δ 18 O-ice in Greenland over a series of Dansgaard–Oeschger events |
title_short |
Spatial gradients of temperature, accumulation and δ 18 O-ice in Greenland over a series of Dansgaard–Oeschger events |
title_full |
Spatial gradients of temperature, accumulation and δ 18 O-ice in Greenland over a series of Dansgaard–Oeschger events |
title_fullStr |
Spatial gradients of temperature, accumulation and δ 18 O-ice in Greenland over a series of Dansgaard–Oeschger events |
title_full_unstemmed |
Spatial gradients of temperature, accumulation and δ 18 O-ice in Greenland over a series of Dansgaard–Oeschger events |
title_sort |
spatial gradients of temperature, accumulation and δ 18 o-ice in greenland over a series of dansgaard–oeschger events |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/cp-9-1029-2013 https://doaj.org/article/8b7efe63277c4126afecb3bf1cdd4a2b |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Dansgaard-Oeschger events Greenland GRIP NGRIP Nordic Seas North Greenland Sea ice |
genre_facet |
Dansgaard-Oeschger events Greenland GRIP NGRIP Nordic Seas North Greenland Sea ice |
op_source |
Climate of the Past, Vol 9, Iss 3, Pp 1029-1051 (2013) |
op_relation |
http://www.clim-past.net/9/1029/2013/cp-9-1029-2013.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-9-1029-2013 1814-9324 1814-9332 https://doaj.org/article/8b7efe63277c4126afecb3bf1cdd4a2b |
op_doi |
https://doi.org/10.5194/cp-9-1029-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
3 |
container_start_page |
1029 |
op_container_end_page |
1051 |
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1766395878002655232 |