Revised records of atmospheric trace gases CO2, CH4, N2O, and δ13C-CO2 over the last 2000 years from Law Dome, Antarctica
Ice core records of the major atmospheric greenhouse gases (CO2, CH4, N2O) and their isotopologues covering recent centuries provide evidence of biogeochemical variations during the Late Holocene and pre-industrial periods and over the transition to the industrial period. These records come from a n...
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article Verlagsveröffentlichung Rubino, Mauro Etheridge, David M. Thornton, David P. Howden, Russell Allison, Colin E. Francey, Roger J. Langenfelds, Ray L. Steele, L. Paul Trudinger, Cathy M. Spencer, Darren A. Curran, Mark A. J. van Ommen, Tas D. Smith, Andrew M. Revised records of atmospheric trace gases CO2, CH4, N2O, and δ13C-CO2 over the last 2000 years from Law Dome, Antarctica |
topic_facet |
article Verlagsveröffentlichung |
description |
Ice core records of the major atmospheric greenhouse gases (CO2, CH4, N2O) and their isotopologues covering recent centuries provide evidence of biogeochemical variations during the Late Holocene and pre-industrial periods and over the transition to the industrial period. These records come from a number of ice core and firn air sites and have been measured in several laboratories around the world and show common features but also unresolved differences. Here we present revised records, including new measurements, performed at the CSIRO Ice Core Extraction LABoratory (ICELAB) on air samples from ice obtained at the high-accumulation site of Law Dome (East Antarctica). We are motivated by the increasing use of the records by the scientific community and by recent data-handling developments at CSIRO ICELAB. A number of cores and firn air samples have been collected at Law Dome to provide high-resolution records overlapping recent, direct atmospheric observations. The records have been updated through a dynamic link to the calibration scales used in the Global Atmospheric Sampling LABoratory (GASLAB) at CSIRO, which are periodically revised with information from the latest calibration experiments. The gas-age scales have been revised based on new ice-age scales and the information derived from a new version of the CSIRO firn diffusion model. Additionally, the records have been revised with new, rule-based selection criteria and updated corrections for biases associated with the extraction procedure and the effects of gravity and diffusion in the firn. All measurements carried out in ICELAB–GASLAB over the last 25 years are now managed through a database (the ICElab dataBASE or ICEBASE), which provides consistent data management, automatic corrections and selection of measurements, and a web-based user interface for data extraction. We present the new records, discuss their strengths and limitations, and summarise their main features. The records reveal changes in the carbon cycle and atmospheric chemistry over the last 2 millennia, including the major changes of the anthropogenic era and the smaller, mainly natural variations beforehand. They provide the historical data to calibrate and test the next inter-comparison of models used to predict future climate change (Coupled Model Inter-comparison Project – phase 6, CMIP6). The datasets described in this paper, including spline fits, are available at https://doi.org/10.25919/5bfe29ff807fb (Rubino et al., 2019). |
format |
Article in Journal/Newspaper |
author |
Rubino, Mauro Etheridge, David M. Thornton, David P. Howden, Russell Allison, Colin E. Francey, Roger J. Langenfelds, Ray L. Steele, L. Paul Trudinger, Cathy M. Spencer, Darren A. Curran, Mark A. J. van Ommen, Tas D. Smith, Andrew M. |
author_facet |
Rubino, Mauro Etheridge, David M. Thornton, David P. Howden, Russell Allison, Colin E. Francey, Roger J. Langenfelds, Ray L. Steele, L. Paul Trudinger, Cathy M. Spencer, Darren A. Curran, Mark A. J. van Ommen, Tas D. Smith, Andrew M. |
author_sort |
Rubino, Mauro |
title |
Revised records of atmospheric trace gases CO2, CH4, N2O, and δ13C-CO2 over the last 2000 years from Law Dome, Antarctica |
title_short |
Revised records of atmospheric trace gases CO2, CH4, N2O, and δ13C-CO2 over the last 2000 years from Law Dome, Antarctica |
title_full |
Revised records of atmospheric trace gases CO2, CH4, N2O, and δ13C-CO2 over the last 2000 years from Law Dome, Antarctica |
title_fullStr |
Revised records of atmospheric trace gases CO2, CH4, N2O, and δ13C-CO2 over the last 2000 years from Law Dome, Antarctica |
title_full_unstemmed |
Revised records of atmospheric trace gases CO2, CH4, N2O, and δ13C-CO2 over the last 2000 years from Law Dome, Antarctica |
title_sort |
revised records of atmospheric trace gases co2, ch4, n2o, and δ13c-co2 over the last 2000 years from law dome, antarctica |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/essd-11-473-2019 https://noa.gwlb.de/receive/cop_mods_00002697 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00002655/essd-11-473-2019.pdf https://essd.copernicus.org/articles/11/473/2019/essd-11-473-2019.pdf |
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ENVELOPE(112.833,112.833,-66.733,-66.733) |
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East Antarctica Law Dome |
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East Antarctica Law Dome |
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Antarc* Antarctica East Antarctica ice core |
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Antarc* Antarctica East Antarctica ice core |
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Earth System Science Data -- http://www.earth-syst-sci-data.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2475469 -- 1866-3516 https://doi.org/10.5194/essd-11-473-2019 https://noa.gwlb.de/receive/cop_mods_00002697 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00002655/essd-11-473-2019.pdf https://essd.copernicus.org/articles/11/473/2019/essd-11-473-2019.pdf |
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https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
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CC-BY |
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https://doi.org/10.5194/essd-11-473-2019 |
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Earth System Science Data |
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11 |
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473 |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00002697 2023-05-15T13:49:21+02:00 Revised records of atmospheric trace gases CO2, CH4, N2O, and δ13C-CO2 over the last 2000 years from Law Dome, Antarctica Rubino, Mauro Etheridge, David M. Thornton, David P. Howden, Russell Allison, Colin E. Francey, Roger J. Langenfelds, Ray L. Steele, L. Paul Trudinger, Cathy M. Spencer, Darren A. Curran, Mark A. J. van Ommen, Tas D. Smith, Andrew M. 2019-04 electronic https://doi.org/10.5194/essd-11-473-2019 https://noa.gwlb.de/receive/cop_mods_00002697 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00002655/essd-11-473-2019.pdf https://essd.copernicus.org/articles/11/473/2019/essd-11-473-2019.pdf eng eng Copernicus Publications Earth System Science Data -- http://www.earth-syst-sci-data.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2475469 -- 1866-3516 https://doi.org/10.5194/essd-11-473-2019 https://noa.gwlb.de/receive/cop_mods_00002697 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00002655/essd-11-473-2019.pdf https://essd.copernicus.org/articles/11/473/2019/essd-11-473-2019.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2019 ftnonlinearchiv https://doi.org/10.5194/essd-11-473-2019 2022-02-08T23:00:56Z Ice core records of the major atmospheric greenhouse gases (CO2, CH4, N2O) and their isotopologues covering recent centuries provide evidence of biogeochemical variations during the Late Holocene and pre-industrial periods and over the transition to the industrial period. These records come from a number of ice core and firn air sites and have been measured in several laboratories around the world and show common features but also unresolved differences. Here we present revised records, including new measurements, performed at the CSIRO Ice Core Extraction LABoratory (ICELAB) on air samples from ice obtained at the high-accumulation site of Law Dome (East Antarctica). We are motivated by the increasing use of the records by the scientific community and by recent data-handling developments at CSIRO ICELAB. A number of cores and firn air samples have been collected at Law Dome to provide high-resolution records overlapping recent, direct atmospheric observations. The records have been updated through a dynamic link to the calibration scales used in the Global Atmospheric Sampling LABoratory (GASLAB) at CSIRO, which are periodically revised with information from the latest calibration experiments. The gas-age scales have been revised based on new ice-age scales and the information derived from a new version of the CSIRO firn diffusion model. Additionally, the records have been revised with new, rule-based selection criteria and updated corrections for biases associated with the extraction procedure and the effects of gravity and diffusion in the firn. All measurements carried out in ICELAB–GASLAB over the last 25 years are now managed through a database (the ICElab dataBASE or ICEBASE), which provides consistent data management, automatic corrections and selection of measurements, and a web-based user interface for data extraction. We present the new records, discuss their strengths and limitations, and summarise their main features. The records reveal changes in the carbon cycle and atmospheric chemistry over the last 2 millennia, including the major changes of the anthropogenic era and the smaller, mainly natural variations beforehand. They provide the historical data to calibrate and test the next inter-comparison of models used to predict future climate change (Coupled Model Inter-comparison Project – phase 6, CMIP6). The datasets described in this paper, including spline fits, are available at https://doi.org/10.25919/5bfe29ff807fb (Rubino et al., 2019). Article in Journal/Newspaper Antarc* Antarctica East Antarctica ice core Niedersächsisches Online-Archiv NOA East Antarctica Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Earth System Science Data 11 2 473 492 |