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Methane Isotopes in South Pole Firn Air, 2008 Data DOI: https://doi.org/10.7265/N55T3HFP Cite as Sowers, T. A. (2011) "Methane Isotopes in South Pole Firn Air, 2008" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.7265/N55T3HFP. AMD - DIF Record(s) NSIDC-0502_1 Abstract This data set contains depth profiles for delta carbon-13 (δ13C) and delta deuterium (δD) of methane (CH4) in South Pole firn air. The investigators obtained air samples from two boreholes during December 2008 and January 2009, and subsequently determined isotope ratios at 18 depths. The profiles represent a roughly 100-year history of the isotopic composition of CH4 at South Pole Station (no depth-age model provided). Data are available via FTP as an ASCII text file (.txt) and a Microsoft Excel file (.xlsx). Creator(s): Sowers, Todd A. Date Created: 2011-01-01 Repository: USAP-DC (current) - NSIDC (original) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: -180, East: 180, South: -90, North: 90 Temporal Extent(s) Start: 2008-12-01 - End: 2009-01-31 Award(s) NSF 0739491 Version: 1 Related Project(s) Collaborative Research: Methane Isotopes, Hydrocarbons, and other Trace Gases in South Pole Firn Air 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) Battle, M. et al. 1996. Atmospheric Gas Concentrations over the Past Century Measured in Air from Firn at the South Pole. Nature 383, 231-235. (doi:10.1038/383231a0) Keywords Antarctica Atmosphere Chemistry:fluid Geochemistry Isotope Paleoclimate Snow/ice South Pole