Implications of ice core smoothing for inferring CO 2 flux variability
Ice core records are commonly used to infer information about past variability of CO 2 fluxes. Because of processes involved in enclosing this air in ice, ice core records are a smoothed representation of the actual past atmospheric variations. As such, there is a limit to how much information ice c...
Published in: | Journal of Geophysical Research |
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ftpubman:oai:pure.mpg.de:item_1691571 2023-08-27T04:05:34+02:00 Implications of ice core smoothing for inferring CO 2 flux variability Trudinger, C. Rayner, P. Enting, I. Heimann, M. Scholze, M. 2003 application/octet-stream http://hdl.handle.net/11858/00-001M-0000-000E-D125-F http://hdl.handle.net/11858/00-001M-0000-000E-D124-2 unknown info:eu-repo/semantics/altIdentifier/doi/10.1029/2003JD003562 http://hdl.handle.net/11858/00-001M-0000-000E-D125-F http://hdl.handle.net/11858/00-001M-0000-000E-D124-2 Journal of Geophysical Research: Atmospheres info:eu-repo/semantics/article 2003 ftpubman https://doi.org/10.1029/2003JD003562 2023-08-02T01:03:03Z Ice core records are commonly used to infer information about past variability of CO 2 fluxes. Because of processes involved in enclosing this air in ice, ice core records are a smoothed representation of the actual past atmospheric variations. As such, there is a limit to how much information ice core measurements can contain about flux variability on short timescales. With a numerical model of the firn processes we quantify this smoothing and describe how it can be reproduced with pulse response functions. We generate and make available pulse response functions for CO 2 at the DE08 site on Law Dome, Antarctica. We discuss implications of the smoothing for inferring CO 2 flux variability from the Law Dome ice core record. In particular we look at results from an intercomparison of terrestrial biosphere models over the twentieth century and show how much of the CO 2 variability would be reflected in the Law Dome ice core record. We also smooth atmospheric delta(13)CO(2) from a study that compared fixed and varying isotopic discrimination. We find that the impact of changing discrimination, shown previously to be large on interannual timescales, is small on the decadal scales accessible from ice core records. Article in Journal/Newspaper Antarc* Antarctica ice core Max Planck Society: MPG.PuRe Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Journal of Geophysical Research 108 D16 ACH 1-1 ACH 1-6 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
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ftpubman |
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unknown |
description |
Ice core records are commonly used to infer information about past variability of CO 2 fluxes. Because of processes involved in enclosing this air in ice, ice core records are a smoothed representation of the actual past atmospheric variations. As such, there is a limit to how much information ice core measurements can contain about flux variability on short timescales. With a numerical model of the firn processes we quantify this smoothing and describe how it can be reproduced with pulse response functions. We generate and make available pulse response functions for CO 2 at the DE08 site on Law Dome, Antarctica. We discuss implications of the smoothing for inferring CO 2 flux variability from the Law Dome ice core record. In particular we look at results from an intercomparison of terrestrial biosphere models over the twentieth century and show how much of the CO 2 variability would be reflected in the Law Dome ice core record. We also smooth atmospheric delta(13)CO(2) from a study that compared fixed and varying isotopic discrimination. We find that the impact of changing discrimination, shown previously to be large on interannual timescales, is small on the decadal scales accessible from ice core records. |
format |
Article in Journal/Newspaper |
author |
Trudinger, C. Rayner, P. Enting, I. Heimann, M. Scholze, M. |
spellingShingle |
Trudinger, C. Rayner, P. Enting, I. Heimann, M. Scholze, M. Implications of ice core smoothing for inferring CO 2 flux variability |
author_facet |
Trudinger, C. Rayner, P. Enting, I. Heimann, M. Scholze, M. |
author_sort |
Trudinger, C. |
title |
Implications of ice core smoothing for inferring CO 2 flux variability |
title_short |
Implications of ice core smoothing for inferring CO 2 flux variability |
title_full |
Implications of ice core smoothing for inferring CO 2 flux variability |
title_fullStr |
Implications of ice core smoothing for inferring CO 2 flux variability |
title_full_unstemmed |
Implications of ice core smoothing for inferring CO 2 flux variability |
title_sort |
implications of ice core smoothing for inferring co 2 flux variability |
publishDate |
2003 |
url |
http://hdl.handle.net/11858/00-001M-0000-000E-D125-F http://hdl.handle.net/11858/00-001M-0000-000E-D124-2 |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
Law Dome |
geographic_facet |
Law Dome |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_source |
Journal of Geophysical Research: Atmospheres |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2003JD003562 http://hdl.handle.net/11858/00-001M-0000-000E-D125-F http://hdl.handle.net/11858/00-001M-0000-000E-D124-2 |
op_doi |
https://doi.org/10.1029/2003JD003562 |
container_title |
Journal of Geophysical Research |
container_volume |
108 |
container_issue |
D16 |
container_start_page |
ACH 1-1 |
op_container_end_page |
ACH 1-6 |
_version_ |
1775357283084009472 |