Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core

High-resolution measurements of chemical impurities and methane concentrations in Greenland ice core samples from the early glacial period allow the extension of annual-layer counted chronologies and the improvement of gas age-ice age difference (Δage) essential to the synchronization of ice core re...

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Published in:Climate of the Past
Main Authors: Vallelonga, P., Bertagna, G., Blunier, T., Kjær, H. A., Popp, T. J., Rasmussen, S. O., Steffensen, J. P., Stowasser, C., Svensson, A. S., Warming, E., Winstrup, M., Bigler, M., Kipfstuhl, S.
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2012
Subjects:
Online Access:https://boris.unibe.ch/18153/1/cp-8-1839-2012.pdf
https://boris.unibe.ch/18153/
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spelling ftunivbern:oai:boris.unibe.ch:18153 2023-08-20T04:00:27+02:00 Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core Vallelonga, P. Bertagna, G. Blunier, T. Kjær, H. A. Popp, T. J. Rasmussen, S. O. Steffensen, J. P. Stowasser, C. Svensson, A. S. Warming, E. Winstrup, M. Bigler, M. Kipfstuhl, S. 2012 application/pdf https://boris.unibe.ch/18153/1/cp-8-1839-2012.pdf https://boris.unibe.ch/18153/ eng eng Copernicus Publications https://boris.unibe.ch/18153/ info:eu-repo/semantics/openAccess Vallelonga, P.; Bertagna, G.; Blunier, T.; Kjær, H. A.; Popp, T. J.; Rasmussen, S. O.; Steffensen, J. P.; Stowasser, C.; Svensson, A. S.; Warming, E.; Winstrup, M.; Bigler, M.; Kipfstuhl, S. (2012). Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core. Climate of the past, 8(6), pp. 1839-1847. Göttingen: Copernicus Publications 10.5194/cp-8-1839-2012 <http://dx.doi.org/10.5194/cp-8-1839-2012> info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2012 ftunivbern https://doi.org/10.5194/cp-8-1839-2012 2023-07-31T20:42:15Z High-resolution measurements of chemical impurities and methane concentrations in Greenland ice core samples from the early glacial period allow the extension of annual-layer counted chronologies and the improvement of gas age-ice age difference (Δage) essential to the synchronization of ice core records. We report high-resolution measurements of a 50 m section of the NorthGRIP ice core and corresponding annual layer thicknesses in order to constrain the duration of the Greenland Stadial 22 (GS-22) between Greenland Interstadials (GIs) 21 and 22, for which inconsistent durations and ages have been reported from Greenland and Antarctic ice core records as well as European speleothems. Depending on the chronology used, GS-22 occurred between approximately 89 (end of GI-22) and 83 kyr b2k (onset of GI-21). From annual layer counting, we find that GS-22 lasted between 2696 and 3092 years and was followed by a GI-21 pre-cursor event lasting between 331 and 369 yr. Our layer-based counting agrees with the duration of stadial 22 as determined from the NALPS speleothem record (3250 ± 526 yr) but not with that of the GICC05modelext chronology (2620 yr) or an alternative chronology based on gas-marker synchronization to EPICA Dronning Maud Land ice core. These results show that GICC05modelext overestimates accumulation and/or underestimates thinning in this early part of the last glacial period. We also revise the possible ranges of NorthGRIP Δdepth (5.49 to 5.85 m) and Δage (498 to 601 yr) at the warming onset of GI-21 as well as the Δage range at the onset of the GI-21 precursor warming (523 to 654 yr), observing that temperature (represented by the δ15N proxy) increases before CH4 concentration by no more than a few decades. Article in Journal/Newspaper Antarc* Antarctic Dronning Maud Land EPICA Greenland Greenland ice core ice core NGRIP BORIS (Bern Open Repository and Information System, University of Bern) Antarctic Dronning Maud Land Greenland Climate of the Past 8 6 1839 1847
institution Open Polar
collection BORIS (Bern Open Repository and Information System, University of Bern)
op_collection_id ftunivbern
language English
description High-resolution measurements of chemical impurities and methane concentrations in Greenland ice core samples from the early glacial period allow the extension of annual-layer counted chronologies and the improvement of gas age-ice age difference (Δage) essential to the synchronization of ice core records. We report high-resolution measurements of a 50 m section of the NorthGRIP ice core and corresponding annual layer thicknesses in order to constrain the duration of the Greenland Stadial 22 (GS-22) between Greenland Interstadials (GIs) 21 and 22, for which inconsistent durations and ages have been reported from Greenland and Antarctic ice core records as well as European speleothems. Depending on the chronology used, GS-22 occurred between approximately 89 (end of GI-22) and 83 kyr b2k (onset of GI-21). From annual layer counting, we find that GS-22 lasted between 2696 and 3092 years and was followed by a GI-21 pre-cursor event lasting between 331 and 369 yr. Our layer-based counting agrees with the duration of stadial 22 as determined from the NALPS speleothem record (3250 ± 526 yr) but not with that of the GICC05modelext chronology (2620 yr) or an alternative chronology based on gas-marker synchronization to EPICA Dronning Maud Land ice core. These results show that GICC05modelext overestimates accumulation and/or underestimates thinning in this early part of the last glacial period. We also revise the possible ranges of NorthGRIP Δdepth (5.49 to 5.85 m) and Δage (498 to 601 yr) at the warming onset of GI-21 as well as the Δage range at the onset of the GI-21 precursor warming (523 to 654 yr), observing that temperature (represented by the δ15N proxy) increases before CH4 concentration by no more than a few decades.
format Article in Journal/Newspaper
author Vallelonga, P.
Bertagna, G.
Blunier, T.
Kjær, H. A.
Popp, T. J.
Rasmussen, S. O.
Steffensen, J. P.
Stowasser, C.
Svensson, A. S.
Warming, E.
Winstrup, M.
Bigler, M.
Kipfstuhl, S.
spellingShingle Vallelonga, P.
Bertagna, G.
Blunier, T.
Kjær, H. A.
Popp, T. J.
Rasmussen, S. O.
Steffensen, J. P.
Stowasser, C.
Svensson, A. S.
Warming, E.
Winstrup, M.
Bigler, M.
Kipfstuhl, S.
Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core
author_facet Vallelonga, P.
Bertagna, G.
Blunier, T.
Kjær, H. A.
Popp, T. J.
Rasmussen, S. O.
Steffensen, J. P.
Stowasser, C.
Svensson, A. S.
Warming, E.
Winstrup, M.
Bigler, M.
Kipfstuhl, S.
author_sort Vallelonga, P.
title Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core
title_short Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core
title_full Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core
title_fullStr Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core
title_full_unstemmed Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core
title_sort duration of greenland stadial 22 and ice-gas δage from counting of annual layers in greenland ngrip ice core
publisher Copernicus Publications
publishDate 2012
url https://boris.unibe.ch/18153/1/cp-8-1839-2012.pdf
https://boris.unibe.ch/18153/
geographic Antarctic
Dronning Maud Land
Greenland
geographic_facet Antarctic
Dronning Maud Land
Greenland
genre Antarc*
Antarctic
Dronning Maud Land
EPICA
Greenland
Greenland ice core
ice core
NGRIP
genre_facet Antarc*
Antarctic
Dronning Maud Land
EPICA
Greenland
Greenland ice core
ice core
NGRIP
op_source Vallelonga, P.; Bertagna, G.; Blunier, T.; Kjær, H. A.; Popp, T. J.; Rasmussen, S. O.; Steffensen, J. P.; Stowasser, C.; Svensson, A. S.; Warming, E.; Winstrup, M.; Bigler, M.; Kipfstuhl, S. (2012). Duration of Greenland Stadial 22 and ice-gas Δage from counting of annual layers in Greenland NGRIP ice core. Climate of the past, 8(6), pp. 1839-1847. Göttingen: Copernicus Publications 10.5194/cp-8-1839-2012 <http://dx.doi.org/10.5194/cp-8-1839-2012>
op_relation https://boris.unibe.ch/18153/
op_rights info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.5194/cp-8-1839-2012
container_title Climate of the Past
container_volume 8
container_issue 6
container_start_page 1839
op_container_end_page 1847
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