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CH4 data from EPICA ice core over the past 800ka
CTR :306
Key words EPICA; Ice Core; CH4; over the past 800ka
Relevant data Loulergue, L., A. Schilt, R. Spahni, V. Masson-Delmotte, T. Blunier, B. Lemieux, J.-M. Barnola, D. Raynaud, T.F. Stocker, and J. Chappellaz. 2008.Orbital and millennial-scale features of atmospheric CH4 over the past 800,000 years. Nature, Vol. 453, pp. 383-386, 15 May 2008. doi:10.1038/nature06950
Data shows that
Methane record from the EPICA (European Project for Ice Coring in Antarctica) Dome C ice core covering 0 to 800 kyr BP. The air from polar ice-core samples of about 40g (Bern) and 50g (LGGE) is extracted with a melt-refreezing method under vacuum, and the extracted gas is then analysed for CH4 by gas chromatography. Two standard gases (408 p.p.b.v. CH4, 1,050 p.p.b.v. CH4) were used at Bern and one (499 p.p.b.v. CH4) at LGGE, to calibrate the gas chromatographs. The mean CH4 analytical uncertainty (1s) is 10 p.p.b.v.
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