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Antarctic Ice Cores: Methyl Chloride and Methyl Bromide Data DOI: https://doi.org/10.7265/N5DN430Q Cite as Saltzman, E., Aydin, M., Tatum, C., & Williams, M. (2007) "Antarctic Ice Cores: Methyl Chloride and Methyl Bromide" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.7265/N5DN430Q. AMD - DIF Record(s) NSIDC-0313_1 Abstract This data set is an analysis of methyl chloride (CH3Cl) and methyl bromide (CH3Br) in Antarctic ice core samples. Investigators reported mixing ratios of methyl chloride gas extracted from samples taken from the South Pole Remote Earth Science and Seismological Observatory (SPRESSO) core, drilled as part of the International Trans Antarctic Science Expedition (ITASE). This data covers an age range of 2159 - 140 years before present (Y.B.P.) where the year 2000 was used as present. Investigators analyzed trace gases in ice core samples from Siple Dome, West Antarctica (dry-drilled C core and deep, fluid-drilled A core) and from South Pole, Antarctica (300 m dry drilled SPRESSO core). Data are available in Microsoft Excel format and are available via FTP. Creator(s): Saltzman, Eric; Aydin, Murat; Williams, Margaret; Tatum, Cheryl Date Created: 2007-11-10 Repository: USAP-DC (current) - NSIDC (original) License: Creative Commons Attribution-NonCommercial v4.0 Generic [CC BY-NC 4.0] Spatial Extent(s) West: -144.39, East: -144.39, South: -89.93, North: -89.93 Award(s) NSF 0338359 Version: 1 Related Project(s) Methyl chloride and methyl bromide in Antarctic ice cores References Aydin, M., W. J. De Bruyn, and E. S. Saltzman. 2002. Preindustrial Atmospheric Carbonyl Sulfide (OCS) from an Antarctic Ice Core. Geophysical Research Letters 29(9), 1359. (doi:10.1029/2002GL014796) 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) Aydin, M., E. S. Saltzman, W. J. De Bruyn, S. A. Montzka, J. H. Butler, and M. Battle. 2004. Atmospheric variability of methyl chloride over the last 300 years from an Antarctic ice core and firn air. Geophysical Research Letters. Vol. 31. L02109, doi: 10.1029/2003GL018750. (doi:10.1029/2003GL018750) Saltzman, E. S., M. Aydin, W. J. De Bruyn, D. B. King, and S. A. Yvon-Lewis. 2004. Methyl bromide in preindustrial air: measurements from an Antarctic ice core. Journal of Geophysical Research. Vol. 109. No. D5, D0530, doi: 10.1029/2003JD004157. (doi:10.1029/2003JD004157) Butler, J.H., M. Battle, M. Bender, S.A. Montzka, A.D. Clarke, E.S. Saltzman,, C. Sucher, J. Severinghaus, and J.W. Elkins. 1999. A twentieth century record, of atmospheric halocarbons in polar firn air. Nature 399:749-765. (doi:10.1038/21586) Williams, M. B., M. Aydin, C. Tatum, and E. S. Saltzman. 2007. A 2000-Year Atmospheric History of Methyl Chloride from a South Pole Ice Core: Evidence for Climate-Controlled Variability. Geophys. Res. Lett., 34, L07811, doi:10.1029/2006GL029142. (doi:10.1029/2006GL029142) Keywords Antarctica Atmosphere Chemistry:fluid Geochemistry Glaciers/ice Sheet Glaciology Ice Core Ice Core Records ITASE Paleoclimate Siple Dome Ice Core South Pole SPRESSO SPRESSO Ice Core