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.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/cp-12-1061-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
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
College of Earth, Ocean and Atmospheric Sciences, Oregon
State University, Corvallis OR, USA
now at: Department of Earth Sciences, University of
Cambridge, Cambridge, UK
Xavier Faïn
Université Grenoble Alpes/CNRS, Laboratoire de
Glaciologie et Géophysique de l'Environnement, Grenoble,
France
Edward J. Brook
College of Earth, Ocean and Atmospheric Sciences, Oregon
State University, Corvallis OR, USA
Joseph R. McConnell
Division of Hydrologic Sciences, Desert Research
Institute, Reno NV, USA
Olivia J. Maselli
Division of Hydrologic Sciences, Desert Research
Institute, Reno NV, USA
now at: Department of Chemistry, University of Adelaide, South Australia, Australia
Michael Sigl
Division of Hydrologic Sciences, Desert Research
Institute, Reno NV, USA
Laboratory for Radiochemistry and Environmental
Chemistry, Paul Scherrer Institut, Villigen, Switzerland
Jon Edwards
College of Earth, Ocean and Atmospheric Sciences, Oregon
State University, Corvallis OR, USA
Christo Buizert
College of Earth, Ocean and Atmospheric Sciences, Oregon
State University, Corvallis OR, USA
Thomas Blunier
Centre for Ice and Climate, Niels Bohr Institute,
University of Copenhagen, Copenhagen, Denmark
Jérôme Chappellaz
Université Grenoble Alpes/CNRS, Laboratoire de
Glaciologie et Géophysique de l'Environnement, Grenoble,
France
Johannes Freitag
Alfred Wegener Institute, Helmholtz Centre for Polar and
Marine Research, Bremerhaven, Germany
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Latest update: 14 Dec 2024
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.
Local artifacts in ice core methane data are superimposed on consistent records of past...
