Multidecadal variability of atmospheric methane, 1000–1800 C.E. Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/9880vw699

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  • We present a new high-precision, high-resolution record of atmospheric methane from the West Antarctic Ice Sheet (WAIS) Divide ice core covering 1000–1800 C.E., a time period known as the late preindustrial Holocene (LPIH). The results are consistent with previous measurements from the Law Dome ice core, the only other high-resolution record of methane for this time period, and confirm most of the observed variability. Multidecadal variability in methane concentrations throughout the LPIH is weakly correlated or uncorrelated with reconstructions of temperature and precipitation from a variety of geographic regions. Correlations with temperature are dominated by changes in Northern Hemisphere high latitude temperatures between 1400 and 1600 C.E. during the onset of the Little Ice Age. Times of war and plague when large population losses could have reduced anthropogenic emissions are coincident with short periods of decreasing global methane concentrations.
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  • Mitchell, L. E., E. J. Brook, T. Sowers, J. R. McConnell, and K. Taylor (2011), Multidecadal variability of atmospheric methane, 1000–1800 C.E., Journal of Geophysical Research, 116, G02007, doi:10.1029/2010JG001441.
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  • description.provenance : Made available in DSpace on 2012-02-06T22:47:48Z (GMT). No. of bitstreams: 1 BrookEdwardCEOASMultidecadalVariabilityAtmospheric.pdf: 690986 bytes, checksum: 66db8192a413327a50aa648be568f9e6 (MD5) Previous issue date: 2011
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-02-06T22:47:48Z No. of bitstreams: 1 BrookEdwardCEOASMultidecadalVariabilityAtmospheric.pdf: 690986 bytes, checksum: 66db8192a413327a50aa648be568f9e6 (MD5)
  • Journal of Geophysical Research
  • Vol. 116 no. G02007

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