| Summary: | Total air content and methane concentration in the lock in zone of an ice core collected at Summit, Greenland. Methods used are an updated version of methods described originally in the following papers: Mitchell, L.E., Buizert, C., Brook, E.J., Breton, D.J., Fegyveresi, J., Baggenstos, D., Orsi, A., Severinghaus, J., Alley, R.B., Albert, M. and Rhodes, R.H., 2015, Observing and modeling the influence of layering on bubble trapping in polar firn. Journal of Geophysical Research: Atmospheres, 120(6), pp.2558-2574. Mitchell, L., Ed Brook, James E. Lee, Christo Buizert, and Todd Sowers, 2013, Constraints on the Late Holocene Anthropogenic Contribution to the Atmospheric Methane Budget, Science, 342 (6161), 964-966. Mitchell, L., E. Brook, T. Sowers, J. McConnell, and K. Taylor, 2011, Multidecadal variability of atmospheric methane, 1000-1800 C.E, Journal of Geophysical Research 116, G02007, doi:10.1029/2010JG001441.
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