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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Volume 10, issue 5
The Cryosphere, 10, 2099–2111, 2016
https://doi.org/10.5194/tc-10-2099-2016
© 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...

The Cryosphere, 10, 2099–2111, 2016
https://doi.org/10.5194/tc-10-2099-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 15 Sep 2016

Research article | 15 Sep 2016

Dispersion in deep polar firn driven by synoptic-scale surface pressure variability

Christo Buizert and Jeffrey P. Severinghaus

Data sets

Gas transport in firn: multiple-tracer characterisation and model intercomparison for NEEM, Northern Greenland C. Buizert, P. Martinerie, V. V. Petrenko, J. P. Severinghaus, C. M. Trudinger, E. Witrant, J. L. Rosen, A. J. Orsi, M. Rubino, D. M. Etheridge, L. P. Steele, C. Hogan, J. C. Laube, W. T. Sturges, V. A. Levchenko, A. M. Smith, I. Levin, T. J. Conway, E. J. Dlugokencky, P. M. Lang, K. Kawamura, T. M. Jenk, J. W. C. White, T. Sowers, J. Schwander, and T. Blunier https://doi.org/10.5194/acp-12-4259-2012

Controls on the movement and composition of firn air at the West Antarctic Ice Sheet Divide M. O. Battle, J. P. Severinghaus, E. D. Sofen, D. Plotkin, A. J. Orsi, M. Aydin, S. A. Montzka, T. Sowers, and P. P. Tans https://doi.org/10.5194/acp-11-11007-2011

Air mixing in firn and the age of the air at pore close-off J. Schwander, B. Stauffer, and A. Sigg https://www.igsoc.org/annals/10/igs_annals_vol10_year1988_pg141-145.pdf

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Short summary
The upper 50–100 m of the world's ice sheets consists of the firn layer, a porous layer of snow that is slowly compacted by overlying snow. Understanding air movement inside the firn is critical for ice core climate reconstructions. Buizert and Severinghaus identify and describe a new mechanism of firn air movement. High- and low-pressure systems force air movement in the firn that drives strong mixing, called dispersion. Dispersion is the main mechanism for air mixing in the deep firn.
The upper 50–100 m of the world's ice sheets consists of the firn layer, a porous layer of snow...
Citation