IEDA
Dataset Information
The South Pole Ice Core (SPICEcore) chronology and supporting data
Data DOI:
https://doi.org/10.15784/601206
Cite as
Winski, D. A., Alley, R., Aydin, M., Bay, R., Beaudette, R., Brook, E. J., et al. (2019) "The South Pole Ice Core (SPICEcore) chronology and supporting data" U.S. Antarctic Program (USAP) Data Center. doi: https://doi.org/10.15784/601206.
AMD - DIF Record(s)
Abstract
The South Pole Ice Core (SPICEcore) was drilled in 2014-2016 to provide a detailed multi-proxy archive of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. Interpretation of these records requires an accurate depth-age relationship. Here, we present the SP19 timescale for the age of the ice of SPICEcore. SP19 is synchronized to the WD2014 chronology from the West Antarctic Ice Sheet Divide (WAIS Divide) ice core using stratigraphic matching of 251 volcanic events. These events indicate an age of 54,302 +/- 519 years BP (before the year 1950) at the bottom of SPICEcore. Annual layers identified in sodium and magnesium ions to 11,341 BP were used to interpolate between stratigraphic volcanic tie points, yielding an annually-resolved chronology through the Holocene. Estimated timescale uncertainty during the Holocene is less than 18 years relative to WD2014, with the exception of the interval between 1800 to 3100 BP when uncertainty estimates reach +/- 25 years due to widely spaced volcanic tie points. Prior to the Holocene, uncertainties remain within 124 years relative to WD2014. Results show an average Holocene accumulation rate of 7.4 cm/yr (water equivalent). The time variability of accumulation rate is consistent with expectations for steady-state ice flow through the modern spatial pattern of accumulation rate. Time variations in nitrate concentration, nitrate seasonal amplitude, and δ15N of N2 in turn are as expected for the accumulation-rate variations. The highly variable yet well-constrained Holocene accumulation history at the site can help improve scientific understanding of deposition-sensitive climate proxies such as δ15N of N2 and photolyzed chemical compounds.
Creator(s):
Winski, Dominic A.; Fudge, T. J.; Ferris, David G.; Osterberg, Erich C.; Fegyveresi, John; Cole-Dai, Jihong; Thundercloud, Zayta; Cox, Thomas S.; Kreutz, Karl; Ortman, Nikolas; Buizert, Christo; Epifanio, Jenna; Brook, Edward J.; Beaudette, Ross; Severinghaus, Jeffrey; Sowers, Todd A.; Steig, Eric J.; Kahle, Emma; Jones, Tyler; Morris, Valerie; Aydin, Murat; Nicewonger, Melinda R.; Casey, Kimberly A.; Alley, Richard; Waddington, Edwin D.; Iverson, Nels A.; Dunbar, Nelia; Bay, Ryan; Souney, Joseph Jr.; Sigl, Michael; McConnell, Joseph
Date Created:
2019-08-29
Repository:
USAP-DC (current)
Spatial Extent(s)
West: -180, East: -180, South: -90, North: -90
Award(s)
Version:
1
References
  1. Winski, D. A., Fudge, T. J., Ferris, D. G., Osterberg, E. C., Fegyveresi, J. M., Cole-Dai, J., Thundercloud, Z., Cox, T. S., Kreutz, K. J., Ortman, N., Buizert, C., Epifanio, J., Brook, E. J., Beaudette, R., Severinghaus, J., Sowers, T., Steig, E. J., Kahle, E. C., Jones, T. R., Morris, V., Aydin, M., Nicewonger, M. R., Casey, K. A., Alley, R. B., Waddington, E. D., Iverson, N. A., Dunbar, N. W., Bay, R. C., Souney, J. M., Sigl, M., and McConnell, J. R. (2019) The SP19 chronology for the South Pole Ice Core – Part 1: volcanic matching and annual layer counting, Clim. Past, 15, 1793–1808 (doi:10.5194/cp-15-1793-2019)
Supplemental Docs
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README_601206.txt
Data Files
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10.0 kB
SP19_100year_Nitrate_Calcium.csv

SHA256 Checksum: 919fa4ca12e86b20cb6e52a04f321898 File Type: Comma-Separated Values (CSV)

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16.9 kB
SP19_d15N-N2.csv

SHA256 Checksum: 9138ae828cccbfd31862ab2141514a09 File Type: Comma-Separated Values (CSV)

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4.0 kB
SP19_Density.csv

SHA256 Checksum: cd63aa45cc52c245637a745841593a3e File Type: Comma-Separated Values (CSV)

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828.3 kB
SP19_Depth_Age.csv

SHA256 Checksum: f8a9bb1cd27c8352fd898d711c4d1b49 File Type: Comma-Separated Values (CSV)

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382.6 kB
SP19_Holocene_Accumulation_Nitrate.csv

SHA256 Checksum: 04ecf76c6eb323abc0f6921e1138d491 File Type: Comma-Separated Values (CSV)

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3.6 kB
SP19_Tie_Points.csv

SHA256 Checksum: dd07dba0b48e33417fbf8f16c6c2c8a0 File Type: Comma-Separated Values (CSV)

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