Northern Hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple Greenland ice cores
Carbon monoxide (CO) is a regulated pollutant and one of the key components determining the oxidizing capacity of the atmosphere. Obtaining a reliable record of atmospheric CO mixing ratios ([CO]) since preindustrial times is necessary to evaluate climate–chemistry models under conditions different...
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Online Access: | https://doi.org/10.5194/cp-18-631-2022 https://doaj.org/article/35fa6937accb411e9703a1246ce04f11 |
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ftdoajarticles:oai:doaj.org/article:35fa6937accb411e9703a1246ce04f11 2023-05-15T16:28:44+02:00 Northern Hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple Greenland ice cores X. Faïn R. H. Rhodes P. Place V. V. Petrenko K. Fourteau N. Chellman E. Crosier J. R. McConnell E. J. Brook T. Blunier M. Legrand J. Chappellaz 2022-04-01T00:00:00Z https://doi.org/10.5194/cp-18-631-2022 https://doaj.org/article/35fa6937accb411e9703a1246ce04f11 EN eng Copernicus Publications https://cp.copernicus.org/articles/18/631/2022/cp-18-631-2022.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-18-631-2022 1814-9324 1814-9332 https://doaj.org/article/35fa6937accb411e9703a1246ce04f11 Climate of the Past, Vol 18, Pp 631-647 (2022) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2022 ftdoajarticles https://doi.org/10.5194/cp-18-631-2022 2022-12-31T08:10:12Z Carbon monoxide (CO) is a regulated pollutant and one of the key components determining the oxidizing capacity of the atmosphere. Obtaining a reliable record of atmospheric CO mixing ratios ([CO]) since preindustrial times is necessary to evaluate climate–chemistry models under conditions different from today and to constrain past CO sources. We present high-resolution measurements of CO mixing ratios from ice cores drilled at five different sites on the Greenland ice sheet that experience a range of snow accumulation rates, mean surface temperatures, and different chemical compositions. An optical-feedback cavity-enhanced absorption spectrometer (OF-CEAS) was coupled with continuous melter systems and operated during four analytical campaigns conducted between 2013 and 2019. Overall, continuous flow analysis (CFA) of CO was carried out on over 700 m of ice. The CFA-based CO measurements exhibit excellent external precision (ranging from 3.3 to 6.6 ppbv , 1 σ ) and achieve consistently low blanks (ranging from 4.1±1.2 to 12.6±4.4 ppbv ), enabling paleoatmospheric interpretations. However, the five CO records all exhibit variability that is too large and rapid to reflect past atmospheric mixing ratio changes. Complementary tests conducted on discrete ice samples demonstrate that these variations are not artifacts of the analytical method (i.e., production of CO from organics in the ice during melting) but are very likely related to in situ CO production within the ice before analysis. Evaluation of the signal resolution and co-investigation of high-resolution records of CO and total organic carbon (TOC) suggest that past atmospheric CO variations can be extracted from the records' baselines with accumulation rates higher than 20 cm <math xmlns="http://www.w3.org/1998/Math/MathML" id="M8" display="inline" overflow="scroll" dspmath="mathml"><mrow class="unit"><mi mathvariant="normal">w</mi><mo>.</mo><mi mathvariant="normal">e</mi><mo>.</mo><mspace ... Article in Journal/Newspaper Greenland Greenland ice cores Ice Sheet Directory of Open Access Journals: DOAJ Articles Greenland Climate of the Past 18 3 631 647 |
institution |
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 X. Faïn R. H. Rhodes P. Place V. V. Petrenko K. Fourteau N. Chellman E. Crosier J. R. McConnell E. J. Brook T. Blunier M. Legrand J. Chappellaz Northern Hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple Greenland ice cores |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Carbon monoxide (CO) is a regulated pollutant and one of the key components determining the oxidizing capacity of the atmosphere. Obtaining a reliable record of atmospheric CO mixing ratios ([CO]) since preindustrial times is necessary to evaluate climate–chemistry models under conditions different from today and to constrain past CO sources. We present high-resolution measurements of CO mixing ratios from ice cores drilled at five different sites on the Greenland ice sheet that experience a range of snow accumulation rates, mean surface temperatures, and different chemical compositions. An optical-feedback cavity-enhanced absorption spectrometer (OF-CEAS) was coupled with continuous melter systems and operated during four analytical campaigns conducted between 2013 and 2019. Overall, continuous flow analysis (CFA) of CO was carried out on over 700 m of ice. The CFA-based CO measurements exhibit excellent external precision (ranging from 3.3 to 6.6 ppbv , 1 σ ) and achieve consistently low blanks (ranging from 4.1±1.2 to 12.6±4.4 ppbv ), enabling paleoatmospheric interpretations. However, the five CO records all exhibit variability that is too large and rapid to reflect past atmospheric mixing ratio changes. Complementary tests conducted on discrete ice samples demonstrate that these variations are not artifacts of the analytical method (i.e., production of CO from organics in the ice during melting) but are very likely related to in situ CO production within the ice before analysis. Evaluation of the signal resolution and co-investigation of high-resolution records of CO and total organic carbon (TOC) suggest that past atmospheric CO variations can be extracted from the records' baselines with accumulation rates higher than 20 cm <math xmlns="http://www.w3.org/1998/Math/MathML" id="M8" display="inline" overflow="scroll" dspmath="mathml"><mrow class="unit"><mi mathvariant="normal">w</mi><mo>.</mo><mi mathvariant="normal">e</mi><mo>.</mo><mspace ... |
format |
Article in Journal/Newspaper |
author |
X. Faïn R. H. Rhodes P. Place V. V. Petrenko K. Fourteau N. Chellman E. Crosier J. R. McConnell E. J. Brook T. Blunier M. Legrand J. Chappellaz |
author_facet |
X. Faïn R. H. Rhodes P. Place V. V. Petrenko K. Fourteau N. Chellman E. Crosier J. R. McConnell E. J. Brook T. Blunier M. Legrand J. Chappellaz |
author_sort |
X. Faïn |
title |
Northern Hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple Greenland ice cores |
title_short |
Northern Hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple Greenland ice cores |
title_full |
Northern Hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple Greenland ice cores |
title_fullStr |
Northern Hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple Greenland ice cores |
title_full_unstemmed |
Northern Hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple Greenland ice cores |
title_sort |
northern hemisphere atmospheric history of carbon monoxide since preindustrial times reconstructed from multiple greenland ice cores |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-18-631-2022 https://doaj.org/article/35fa6937accb411e9703a1246ce04f11 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores Ice Sheet |
genre_facet |
Greenland Greenland ice cores Ice Sheet |
op_source |
Climate of the Past, Vol 18, Pp 631-647 (2022) |
op_relation |
https://cp.copernicus.org/articles/18/631/2022/cp-18-631-2022.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-18-631-2022 1814-9324 1814-9332 https://doaj.org/article/35fa6937accb411e9703a1246ce04f11 |
op_doi |
https://doi.org/10.5194/cp-18-631-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
3 |
container_start_page |
631 |
op_container_end_page |
647 |
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1766018403012706304 |