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Filtering by: Funding statement This work was supported by NSF OPP grants 0538578, 0520523, and 0538538 and by NASA/Oregon Space Grant Consortium grant NNG05GJ85H. Glaciochemical dating of the WDC05A and WDC06A ice cores was supported by NSF OPP grants 0538427 and 0739780 to the Desert Research Institute. The authors appreciate the support of the WAIS Divide Science Coordination Office at the Desert Research Institute of Reno Nevada for the collection and distribution of the WAIS Divide ice core and related tasks (Kendrick Taylor, NSF grants 0440817 and 0230396). The National Science Foundation Office of Polar Programs also funds the Ice Drilling Program Office and Ice Drilling Design and Operations group for coring activities; Raytheon Polar Services for logistics support in Antarctica; and the 109th New York Air National Guard for airlift in Antarctica. The National Ice Core Laboratory, which curated the core and preformed core processing, is jointly funded by the National Science Foundation and the U.S. Geological Survey. Data and description can be downloaded from the NOAA National Climate Data Center http://www.ncdc.noaa.gov/paleo/paleo.html. Remove constraint Funding statement: This work was supported by NSF OPP grants 0538578, 0520523, and 0538538 and by NASA/Oregon Space Grant Consortium grant NNG05GJ85H. Glaciochemical dating of the WDC05A and WDC06A ice cores was supported by NSF OPP grants 0538427 and 0739780 to the Desert Research Institute. The authors appreciate the support of the WAIS Divide Science Coordination Office at the Desert Research Institute of Reno Nevada for the collection and distribution of the WAIS Divide ice core and related tasks (Kendrick Taylor, NSF grants 0440817 and 0230396). The National Science Foundation Office of Polar Programs also funds the Ice Drilling Program Office and Ice Drilling Design and Operations group for coring activities; Raytheon Polar Services for logistics support in Antarctica; and the 109th New York Air National Guard for airlift in Antarctica. The National Ice Core Laboratory, which curated the core and preformed core processing, is jointly funded by the National Science Foundation and the U.S. Geological Survey. Data and description can be downloaded from the NOAA National Climate Data Center http://www.ncdc.noaa.gov/paleo/paleo.html.

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  • The late holocene atmospheric methane budget reconstructed from ice cores

    Creator:
    Mitchell, Logan E.
    Abstract:
    Ice cores are considered the gold standard for recording past climate and biogeochemical changes. However, gas records derived from ice core analysis have until now been largely limited to centennial and longer timescales because sufficient temporal resolution and analytical precision have been lacking, except during rare times when atmospheric concentrations...
    Resource Type:
    Dissertation
    Full Text:
    rest of the WAIS Divide crew, it was awesome! I also wish to thank the National Science Foundation

  • Carbon cycle variability during the last millennium and last deglaciation

    Creator:
    Bauska, Thomas K.
    Abstract:
    The exchange of carbon on earth is one of the fundamental processes that sustains life and regulates climate. Since the onset of the Industrial Revolution, the burning of fossil fuels and anthropogenic land conversion have altered the carbon cycle, increasing carbon dioxide in the atmosphere to levels that are unprecedented...
    Resource Type:
    Dissertation
    Full Text:
    ) from polar ice. The new method is then used to reconstruct the atmospheric history of δ13C of CO2

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

    Creator:
    Mitchell, Logan E., Brook, Edward J., Sowers, Todd, McConnell, J. R., and Taylor, Kendrick
    Abstract:
    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...
    Resource Type:
    Article
    Full Text:
    of the air at the lock in depth (LID) which is then subtracted from the age of the ice at the LID to

  • MitchellLoganCEOASObservingModelingInfluence.pdf

    Creator:
    Mitchell, Logan E., Buizert, Christo, Brook, Edward J., Rhodes, Rachael H., and et al.
    Abstract:
    Interpretation of ice core trace gas records depends on an accurate understanding of the processes that smooth the atmospheric signal in the firn. Much work has been done to understand the processes affecting air transport in the open pores of the firn, but a paucity of data from air trapped...
    Full Text:
    (mean of samples from 100 to 300m at GISP2 and WAIS Divide) was minimized (not shown). The value of c