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Methane Isotopes from the WAIS Divide Ice Core Data DOI: https://doi.org/10.7265/N5J67DW0 Cite as Sowers, T. A. (2009) "Methane Isotopes from the WAIS Divide Ice Core" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.7265/N5J67DW0. AMD - DIF Record(s) NSIDC-0435_1 Abstract This data set includes methane (CH4) isotope data from the West Antarctic Ice Sheet (WAIS) Divide ice core, WDC05A, in Antarctica. The data include depth, gas age, and the isotopic composition of methane (∂13C and ∂D of CH4). The ice core was collected during the 2005-2006 Antarctic field season. The CH4 isotope data was generated in 2008 using wet extraction methodology. Samples span the last 1,000 years, at a resolution of about 15 years. Data for samples above 69 meters were from firn air, and data below 69 meters from ice. The dating of the ice was based on continuous chemical analyses above 69 meters and Electrical Conductivity/Dielectric Property (ECM/DEP) measurements from ice. Dating uncertainty is estimated to be better than five years. Data are available via FTP in Microsoft Excel (.xls) tab delimited format Creator(s): Sowers, Todd A. Date Created: 2009-12-01 Repository: USAP-DC (current) - NSIDC (original) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: 112.09, East: 112.09, South: -79.47, North: -79.47 Temporal Extent(s) Start: 2008-01-01 - End: 2008-12-30 Award(s) NSF 0440759 Version: 1 Related Project(s) Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site References Sowers, T., S. Bernard, O. Aballain, J. Chappellaz, J.-M. Barnola, and T. Marik. 2005. Records of the d13C of atmospheric CH4 over the last 2 centuries as recorded in Antarctic snow and ice. Global Biogeochemical Cycles 19, doi:10.1029/2004GB002408. (doi:10.1029/2004GB002408) Sowers, T. 2010. Atmospheric Methane Isotope Records Covering the Holocene Period. Quaternary Science Reviews 29, doi:10.1016/j.quascirev.2009.05.023 (doi:10.1016/j.quascirev.2009.05.023) Sowers, T. 2006. Late Quaternary atmospheric CH4 isotope record suggests marine clathrates are stable. Science 311: 838-841. (doi:10.1126/science.1121235 ) Mischler, J.A., Sowers, T.A., Alley, R.B., Battle, M., McConnell, J.R., Mitchell, L., Popp, T., Sofen, E. and Spencer, M.K. 2009. Carbon and hydrogen isotopic composition of methane over the last 1000 years. Global Biogeochemical Cycles, 23(GB4024). doi: 10.1029/2009GB003460. (doi:10.1029/2009GB003460) Keywords Antarctica Chemistry:fluid Geochemistry Glaciers/ice Sheet Ice Core Records Isotope Methane Paleoclimate WAIS Divide WAIS Divide Ice Core