Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP
The stable carbon isotopic signature of carbon dioxide (d13CO2) measured in the air occlusions of polar ice provides important constraints on the carbon cycle in past climates. In order to exploit this information for previous glacial periods, one must use deep, clathrated ice, where the occluded ai...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.809527 2023-05-15T13:49:51+02:00 Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP Schaefer, Hinrich Lourantou, Anna Chappellaz, Jérôme A Lüthi, Dieter Bereiter, Bernhard Barnola, Jean-Marc MEDIAN LATITUDE: -77.325000 * MEDIAN LONGITUDE: 38.833335 * SOUTH-BOUND LATITUDE: -79.550000 * WEST-BOUND LONGITUDE: -45.683330 * NORTH-BOUND LATITUDE: -75.100000 * EAST-BOUND LONGITUDE: 123.350000 * DATE/TIME START: 1993-01-01T00:00:00 * DATE/TIME END: 2004-12-31T00:00:00 * MINIMUM DEPTH, ice/snow: 729.30 m * MAXIMUM DEPTH, ice/snow: 860.75 m 2011-04-03 text/tab-separated-values, 162 data points https://doi.pangaea.de/10.1594/PANGAEA.809527 https://doi.org/10.1594/PANGAEA.809527 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.809527 https://doi.org/10.1594/PANGAEA.809527 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Schaefer, Hinrich; Lourantou, Anna; Chappellaz, Jérôme A; Lüthi, Dieter; Bereiter, Bernhard; Barnola, Jean-Marc (2011): On the suitability of partially clathrated ice for analysis of concentration and d13C of palaeo-atmospheric CO2. Earth and Planetary Science Letters, 307(3-4), 334-340, https://doi.org/10.1016/j.epsl.2011.05.007 Berkner Island BIC Carbon dioxide standard deviation DEPTH ice/snow Dome C Antarctica EDC EPICA EPICA Dome C European Project for Ice Coring in Antarctica Event label Gas age ICEDRILL Ice drill Mass spectrometer Finnigan MAT 252 Sample code/label see reference(s) δ13C atmospheric Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.809527 https://doi.org/10.1016/j.epsl.2011.05.007 2023-01-20T09:00:53Z The stable carbon isotopic signature of carbon dioxide (d13CO2) measured in the air occlusions of polar ice provides important constraints on the carbon cycle in past climates. In order to exploit this information for previous glacial periods, one must use deep, clathrated ice, where the occluded air is preserved not in bubbles but in the form of air hydrates. Therefore, it must be established whether the original atmospheric d13CO2 signature can be reconstructed from clathrated ice. We present a comparative study using coeval bubbly ice from Berkner Island and ice from the bubble-clathrate transformation zone (BCTZ) of EPICA Dome C (EDC). In the EDC samples the gas is partitioned into clathrates and remaining bubbles as shown by erroneously low and scattered CO2 concentration values, presenting a worst-case test for d13CO2 reconstructions. Even so, the reconstructed atmospheric d13CO2 values show only slightly larger scatter. The difference to data from coeval bubbly ice is statistically significant. However, the 0.16 per mil magnitude of the offset is small for practical purposes, especially in light of uncertainty from non-uniform corrections for diffusion related fractionation that could contribute to the discrepancy. Our results are promising for palaeo-atmospheric studies of d13CO2 using a ball mill dry extraction technique below the BCTZ of ice cores, where gas is not subject to fractionation into microfractures and between clathrate and bubble reservoirs. Dataset Antarc* Antarctica Berkner Island EPICA PANGAEA - Data Publisher for Earth & Environmental Science Berkner Island ENVELOPE(-48.117,-48.117,-79.333,-79.333) Snow Dome ENVELOPE(-89.967,-89.967,79.435,79.435) ENVELOPE(-45.683330,123.350000,-75.100000,-79.550000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Berkner Island BIC Carbon dioxide standard deviation DEPTH ice/snow Dome C Antarctica EDC EPICA EPICA Dome C European Project for Ice Coring in Antarctica Event label Gas age ICEDRILL Ice drill Mass spectrometer Finnigan MAT 252 Sample code/label see reference(s) δ13C atmospheric |
spellingShingle |
Berkner Island BIC Carbon dioxide standard deviation DEPTH ice/snow Dome C Antarctica EDC EPICA EPICA Dome C European Project for Ice Coring in Antarctica Event label Gas age ICEDRILL Ice drill Mass spectrometer Finnigan MAT 252 Sample code/label see reference(s) δ13C atmospheric Schaefer, Hinrich Lourantou, Anna Chappellaz, Jérôme A Lüthi, Dieter Bereiter, Bernhard Barnola, Jean-Marc Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP |
topic_facet |
Berkner Island BIC Carbon dioxide standard deviation DEPTH ice/snow Dome C Antarctica EDC EPICA EPICA Dome C European Project for Ice Coring in Antarctica Event label Gas age ICEDRILL Ice drill Mass spectrometer Finnigan MAT 252 Sample code/label see reference(s) δ13C atmospheric |
description |
The stable carbon isotopic signature of carbon dioxide (d13CO2) measured in the air occlusions of polar ice provides important constraints on the carbon cycle in past climates. In order to exploit this information for previous glacial periods, one must use deep, clathrated ice, where the occluded air is preserved not in bubbles but in the form of air hydrates. Therefore, it must be established whether the original atmospheric d13CO2 signature can be reconstructed from clathrated ice. We present a comparative study using coeval bubbly ice from Berkner Island and ice from the bubble-clathrate transformation zone (BCTZ) of EPICA Dome C (EDC). In the EDC samples the gas is partitioned into clathrates and remaining bubbles as shown by erroneously low and scattered CO2 concentration values, presenting a worst-case test for d13CO2 reconstructions. Even so, the reconstructed atmospheric d13CO2 values show only slightly larger scatter. The difference to data from coeval bubbly ice is statistically significant. However, the 0.16 per mil magnitude of the offset is small for practical purposes, especially in light of uncertainty from non-uniform corrections for diffusion related fractionation that could contribute to the discrepancy. Our results are promising for palaeo-atmospheric studies of d13CO2 using a ball mill dry extraction technique below the BCTZ of ice cores, where gas is not subject to fractionation into microfractures and between clathrate and bubble reservoirs. |
format |
Dataset |
author |
Schaefer, Hinrich Lourantou, Anna Chappellaz, Jérôme A Lüthi, Dieter Bereiter, Bernhard Barnola, Jean-Marc |
author_facet |
Schaefer, Hinrich Lourantou, Anna Chappellaz, Jérôme A Lüthi, Dieter Bereiter, Bernhard Barnola, Jean-Marc |
author_sort |
Schaefer, Hinrich |
title |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP |
title_short |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP |
title_full |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP |
title_fullStr |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP |
title_full_unstemmed |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP |
title_sort |
stable carbon isotope ratios of carbon dioxide from edc and berkner island ice cores for 40-50 ka bp |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.809527 https://doi.org/10.1594/PANGAEA.809527 |
op_coverage |
MEDIAN LATITUDE: -77.325000 * MEDIAN LONGITUDE: 38.833335 * SOUTH-BOUND LATITUDE: -79.550000 * WEST-BOUND LONGITUDE: -45.683330 * NORTH-BOUND LATITUDE: -75.100000 * EAST-BOUND LONGITUDE: 123.350000 * DATE/TIME START: 1993-01-01T00:00:00 * DATE/TIME END: 2004-12-31T00:00:00 * MINIMUM DEPTH, ice/snow: 729.30 m * MAXIMUM DEPTH, ice/snow: 860.75 m |
long_lat |
ENVELOPE(-48.117,-48.117,-79.333,-79.333) ENVELOPE(-89.967,-89.967,79.435,79.435) ENVELOPE(-45.683330,123.350000,-75.100000,-79.550000) |
geographic |
Berkner Island Snow Dome |
geographic_facet |
Berkner Island Snow Dome |
genre |
Antarc* Antarctica Berkner Island EPICA |
genre_facet |
Antarc* Antarctica Berkner Island EPICA |
op_source |
Supplement to: Schaefer, Hinrich; Lourantou, Anna; Chappellaz, Jérôme A; Lüthi, Dieter; Bereiter, Bernhard; Barnola, Jean-Marc (2011): On the suitability of partially clathrated ice for analysis of concentration and d13C of palaeo-atmospheric CO2. Earth and Planetary Science Letters, 307(3-4), 334-340, https://doi.org/10.1016/j.epsl.2011.05.007 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.809527 https://doi.org/10.1594/PANGAEA.809527 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.809527 https://doi.org/10.1016/j.epsl.2011.05.007 |
_version_ |
1766252377020563456 |