IEDA
Dataset Information
Trapped Gas Composition and Chronology of the Vostok Ice Core
Data DOI:
10.7265/N5P26W12
Cite as
Bender, M. et al. (2007) "Trapped Gas Composition and Chronology of the Vostok Ice Core" U.S. Antarctic Program (USAP) Data Center. doi: 10.7265/N5P26W12.
AMD - DIF Record(s)
Abstract
This data set includes a time scale for the Vostok ice core, retrieved from Vostok Station on the East Antarctic Plateau. This chronology is derived by orbitally tuning to molecular oxygen to nitrogen (O<sub>2</sub>/N<sub>2</sub>) ratios in occluded air for depths deeper than 1550 m (greater than 112,000 years old), and by gas correlation to the Greenland Ice Sheet Project 2 (GISP2) chronology for the ice core section that is shallower than 1422 m (less than 102,000 years old). Because of poor gas preservation in air bubbles in shallower depths, investigators could only constrain the Vostok chronology for the section deeper than 1550 m by O<sub>2</sub>/N<sub>2</sub>. Thus for the shallower section of the core, they synchronized the Vostok delta oxygen-18 (&delta;<sup>18</sup>O) and methane (CH<sub>4</sub>) measurements to those of the GISP2 to obtain the chronology (see Bender, et al. 2006). Note, CH<sub>4</sub> data are not included in this data set. Investigators analyzed the O<sub>2</sub>/N<sub>2</sub> and the<em><strong> </strong></em>&delta;<sup>18</sup>O record ratios for approximately the past 115,000 to 400,000 years in the Vostok ice core. They combined new measurements for O<sub>2</sub>/N<sub>2</sub> and &delta;<sup>18</sup>O with data from Bender (2002) and Petit, et al. (1999), respectively. Data are in Microsoft Excel format and are available via FTP.
Creator(s):
Bender, Michael; Suwa, Makoto
Date Created:
2007-07-10
Repository:
USAP-DC (current) - NSIDC (original)
Spatial Extent(s)
West: 106.8, East: 106.8, South: -72.4667, North: -72.4667
Temporal Extent(s)
Start: 2003-09-01 - End: 2006-06-30
Award(s)
Version:
1
References
  1. Bender, M. L. 2002. Orbital tuning chronology for the Vostok climate record supported by trapped gas composition. Earth and Planetary Science Letters 204(1), 275-289. (doi:10.1016/S0012-821X(02)00980-9)
  2. Petit, J. J., J. Jouzel, D. Raynaud, N. I. Barkov, J.-M. Barnola, I. Basile, M. Bender, et al. 1999. Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica. Nature 399, 429-436. (doi:10.1038/20859)
  3. Suwa, M. 2007. Chronologies for ice cores constrained by their gas records and their implications for climate history for the past 400,000 years. PhD thesis, Princeton University, Princeton, NJ.
  4. Suwa, M., and M. Bender. In press. Chronology of the Vostok ice core constrained by O2/N2 ratios of occluded air, and its implication for the Vostok climate records. Quaternary Science Reviews. (doi:10.1016/j.quascirev.2008.02.017)
Supplemental Docs
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nsidc0311_UG.pdf
Data Files
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287.7 kB
Suwa_2007_VostokO2N2chronology.xls

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