Local artifacts in ice core methane records caused by layered bubble  trapping and in situ production: a multi-site investigation

Rhodes, Rachael H.; Faïn, Xavier; Brook, Edward J.; McConnell, Joseph R.; Maselli, Olivia J.; Sigl, Michael; Edwards, Jon; Buizert, Christo; Blunier, Thomas; Chappellaz, Jérôme; Freitag, Johannes

doi:https://doi.org/10.5194/cp-12-1061-2016

Articles | Volume 12, issue 4

https://doi.org/10.5194/cp-12-1061-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

International Partnerships in Ice Core Sciences (IPICS) Second...

https://doi.org/10.5194/cp-12-1061-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 12, issue 4

Research article

|

26 Apr 2016

Research article |

| 26 Apr 2016

Local artifacts in ice core methane records caused by layered bubble trapping and in situ production: a multi-site investigation

Rachael H. Rhodes, Xavier Faïn, Edward J. Brook, Joseph R. McConnell, Olivia J. Maselli, Michael Sigl, Jon Edwards, Christo Buizert, Thomas Blunier, Jérôme Chappellaz, and Johannes Freitag

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Final revised paper (published on 26 Apr 2016)
Supplement to the final revised paper
Preprint (discussion started on 15 Jan 2016)
Supplement to the preprint

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Ultra-high resolution CH4 reveals annual layers in bubble trapping', Jeff Severinghaus, 30 Jan 2016
- AC1: 'Authors reply to JS review', Rachael Rhodes, 22 Mar 2016
RC2: 'Review of Rhodes et al. Local artifacts in ice core methane records caused by layered bubble trapping and in-situ production: a multi-site investigation', David Etheridge, 29 Feb 2016
- AC2: 'Authors reply to DE review', Rachael Rhodes, 22 Mar 2016

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

ED: Publish subject to minor revisions (review by Editor) (01 Apr 2016) by Tas van Ommen

AR by Rachael Rhodes on behalf of the Authors (15 Apr 2016) Author's response Manuscript

ED: Publish subject to technical corrections (19 Apr 2016) by Tas van Ommen

AR by Rachael Rhodes on behalf of the Authors (19 Apr 2016) Manuscript

Short summary

Local artifacts in ice core methane data are superimposed on consistent records of past atmospheric variability. These artifacts are not related to past atmospheric history and care should be taken to avoid interpreting them as such. By investigating five polar ice cores from sites with different conditions, we relate isolated methane spikes to melt layers and decimetre-scale variations as "trapping signal" associated with a difference in timing of air bubble closure in adjacent firn layers.