This data set contains methane measurements made in trapped air in the Holocene sections of two ice cores: the Siple Dome ice core in Antarctica, and the Greenland Ice Sheet Project 2 (GISP2) ice core in Greenland. The measurements were made at Oregon State University between 2007 and 2009. Measurements were made relative to the NOAA04 methane concentration scale using a working standard internally calibrated to NOAA certified air standards. Concentrations are corrected for gravitational fractionation and solubility effects in the melt-refreeze extraction. Data are available via FTP in Microsoft Excel (.xls) format.
Brook, E., J. W. C. White, A. Schilla, M. Bender, B. A. Barnett, J. Severinghaus, K. C. Taylor, R. B. Alley and E. J . Steig. 2005. Timing of millennial-scale climate change at Siple Dome, West Antarctica, during the last glacial period, Quaternary Science Reviews 24, 1333-1343. doi:10.1016/j.quascirev.2005.02.002