Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP, 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
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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ftdatacite:10.1594/pangaea.809527 2023-05-15T13:33:00+02:00 Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP, 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 Schaefer, Hinrich Lourantou, Anna Chappellaz, Jérôme A Lüthi, Dieter Bereiter, Bernhard Barnola, Jean-Marc 2011 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.809527 https://doi.pangaea.de/10.1594/PANGAEA.809527 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.epsl.2011.05.007 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label Sample code/label DEPTH, ice/snow Gas age Carbon dioxide Carbon dioxide, standard deviation δ13C, carbon dioxide, atmospheric δ13C, standard deviation Ice drill see references Mass spectrometer Finnigan MAT 252 Dome C European Project for Ice Coring in Antarctica EPICA Supplementary Dataset dataset Dataset 2011 ftdatacite https://doi.org/10.1594/pangaea.809527 https://doi.org/10.1016/j.epsl.2011.05.007 2022-02-08T16:24:46Z 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. : The data set contains concentrations and stable isotope ratios (delta13CO2) of carbon dioxide (CO2) from the EPICA Dome C (EDC) and Berkner Island (BIC) ice cores. Gas ages are between 40 and 50 ka BP. CO2 concentrations [CO2] are derived from peak heights of the isotope ratio mass spectrometer m/z = 44 traces. All values for [CO2] and delta13CO2 are averages over multiple runs and corrected for gravitational fractionation using delta15N data for BIC and an empirical relationship between delta15N and deltaD(ice) for EDC. Standard deviations are derived from replicate measurements. delta13CO2 standard deviations for BIC additionally include the standard deviation of the delta15N data used for gravitational correction.Depth, ice/snow = top depth Dataset Antarc* Antarctica Berkner Island EPICA DataCite Metadata Store (German National Library of Science and Technology) Berkner Island ENVELOPE(-48.117,-48.117,-79.333,-79.333) Schaefer ENVELOPE(166.383,166.383,-71.367,-71.367) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Sample code/label DEPTH, ice/snow Gas age Carbon dioxide Carbon dioxide, standard deviation δ13C, carbon dioxide, atmospheric δ13C, standard deviation Ice drill see references Mass spectrometer Finnigan MAT 252 Dome C European Project for Ice Coring in Antarctica EPICA |
spellingShingle |
Event label Sample code/label DEPTH, ice/snow Gas age Carbon dioxide Carbon dioxide, standard deviation δ13C, carbon dioxide, atmospheric δ13C, standard deviation Ice drill see references Mass spectrometer Finnigan MAT 252 Dome C European Project for Ice Coring in Antarctica EPICA 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, 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 |
topic_facet |
Event label Sample code/label DEPTH, ice/snow Gas age Carbon dioxide Carbon dioxide, standard deviation δ13C, carbon dioxide, atmospheric δ13C, standard deviation Ice drill see references Mass spectrometer Finnigan MAT 252 Dome C European Project for Ice Coring in Antarctica EPICA |
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. : The data set contains concentrations and stable isotope ratios (delta13CO2) of carbon dioxide (CO2) from the EPICA Dome C (EDC) and Berkner Island (BIC) ice cores. Gas ages are between 40 and 50 ka BP. CO2 concentrations [CO2] are derived from peak heights of the isotope ratio mass spectrometer m/z = 44 traces. All values for [CO2] and delta13CO2 are averages over multiple runs and corrected for gravitational fractionation using delta15N data for BIC and an empirical relationship between delta15N and deltaD(ice) for EDC. Standard deviations are derived from replicate measurements. delta13CO2 standard deviations for BIC additionally include the standard deviation of the delta15N data used for gravitational correction.Depth, ice/snow = top depth |
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, 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 |
title_short |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP, 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 |
title_full |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP, 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 |
title_fullStr |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP, 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 |
title_full_unstemmed |
Stable carbon isotope ratios of carbon dioxide from EDC and Berkner Island ice cores for 40-50 ka BP, 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 |
title_sort |
stable carbon isotope ratios of carbon dioxide from edc and berkner island ice cores for 40-50 ka bp, 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 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2011 |
url |
https://dx.doi.org/10.1594/pangaea.809527 https://doi.pangaea.de/10.1594/PANGAEA.809527 |
long_lat |
ENVELOPE(-48.117,-48.117,-79.333,-79.333) ENVELOPE(166.383,166.383,-71.367,-71.367) |
geographic |
Berkner Island Schaefer |
geographic_facet |
Berkner Island Schaefer |
genre |
Antarc* Antarctica Berkner Island EPICA |
genre_facet |
Antarc* Antarctica Berkner Island EPICA |
op_relation |
https://dx.doi.org/10.1016/j.epsl.2011.05.007 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.809527 https://doi.org/10.1016/j.epsl.2011.05.007 |
_version_ |
1766037481479733248 |