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Constraints on the Late Holocene Anthropogenic Contribution to the Atmospheric Methane Budget Public Deposited

https://ir.library.oregonstate.edu/concern/articles/h989r5001

This is the author’s version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science on Volume 342 Issue 6161, November 22, 2013, DOI: 10.1126/science.1238920.

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Abstract
  • The origin of the late pre-industrial Holocene (LPIH) increase in atmospheric methane concentrations has been much debated. Hypotheses invoking changes in solely anthropogenic sources or solely natural sources have been proposed to explain the increase in concentrations. Here two high-resolution, high-precision ice core methane concentration records from Greenland and Antarctica are presented and are used to construct a high-resolution record of the methane inter-polar difference (IPD). The IPD record constrains the latitudinal distribution of emissions and shows that LPIH emissions increased primarily in the tropics with secondary increases in the subtropical northern hemisphere. Anthropogenic and natural sources have different latitudinal characteristics, which are exploited to demonstrate that both anthropogenic and natural sources are needed to explain LPIH methane concentration changes.
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  • Mitchell, L., Brook, E., Lee, J. E., Buizert, C., & Sowers, T. (2013). Constraints on the late Holocene anthropogenic contribution to the atmospheric methane budget. Science (New York, N.Y.), 342(6161), 964-966. doi:10.1126/science.1238920
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  • 342
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  • 6161
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  • This work was supported by NSF OPP grants 0538578, 0520523, 0944584 and 0538538 and by NASA/Oregon Space Grant Consortium grant NNG05GJ85H and the NOAA Climate and Global Change Fellowship Program, administered by the University Corporation for Atmospheric Research (Buizert). We thank the WAIS Divide Science Coordination Office at DRI, Reno, NV for the collection and distribution of the WAIS Divide ice core (Kendrick Taylor, NSF Grants 0230396, 0440817, 0944348; and 0944266 - University of New Hampshire); NSF OPP which funds the Ice Drilling Program Office and Ice Drilling Design and Operations group for coring activities; NSF which funds the National Ice Core Laboratory which curated and processed the core; Raytheon Polar Services which provided logistics support in Antarctica; and the 109th New York Air National Guard for airlift in Antarctica.
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  • description.provenance : Made available in DSpace on 2014-03-25T22:55:25Z (GMT). No. of bitstreams: 2 MitchellLoganCEOASConstraintsLateHolocene.pdf: 1448972 bytes, checksum: 06b2ac177510a033d60461331d04e488 (MD5) MitchellLoganCEOASConstraintsLateHoloceneSupplementaryMaterials.pdf: 7651551 bytes, checksum: 3a3d815a607f4f665df70eb63ec86228 (MD5) Previous issue date: 2013-11-22
  • description.provenance : Approved for entry into archive by Deanne Bruner(deanne.bruner@oregonstate.edu) on 2014-03-25T22:55:25Z (GMT) No. of bitstreams: 2 MitchellLoganCEOASConstraintsLateHolocene.pdf: 1448972 bytes, checksum: 06b2ac177510a033d60461331d04e488 (MD5) MitchellLoganCEOASConstraintsLateHoloceneSupplementaryMaterials.pdf: 7651551 bytes, checksum: 3a3d815a607f4f665df70eb63ec86228 (MD5)
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2014-03-25T22:53:15Z No. of bitstreams: 2 MitchellLoganCEOASConstraintsLateHolocene.pdf: 1448972 bytes, checksum: 06b2ac177510a033d60461331d04e488 (MD5) MitchellLoganCEOASConstraintsLateHoloceneSupplementaryMaterials.pdf: 7651551 bytes, checksum: 3a3d815a607f4f665df70eb63ec86228 (MD5)

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