Constructing a Stacked Benthic delta O-18 Record: Readme file
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               World Data Center for Paleoclimatology, Boulder
                                  and
                     NOAA Paleoclimatology Program
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NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!!

NAME OF DATA SET: Constructing a Stacked Benthic delta O-18 Record
LAST UPDATE: 8/2002 (Original Receipt by WDC Paleo)

CONTRIBUTORS: D.B. Karner, J. Levine, B.P. Medeiros, and R.A. Muller, 
Department of Physics, University of California, Berkeley.

IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2002-055

SUGGESTED DATA CITATION: Karner, D.B., et al., 2002,
Constructing a Stacked Benthic delta O-18 Record, 
IGBP PAGES/World Data Center for Paleoclimatology 
Data Contribution Series # 2002-055.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

ORIGINAL REFERENCE:  Karner, D.B., Levine, J., Medeiros, B.P., and 
Muller, R.A., 2002, Constructing a stacked benthic delta O-18 record, 
Paleoceanography v. 17, no. 3, p. 2-1 to 2-17. 
(for obliquity-tuned time scale and stacks)


ADDITIONAL REFERENCES for O-18 data are listed in Table 1 of Karner et al.  

GEOGRAPHIC REGION: Global

PERIOD OF RECORD: 861 KYrBp - Present

LIST OF FILES: readme_karner2002.txt (this file),
benthic_stack.xls (Microsoft Excel format),
benthic_stack.txt (tab-delimited text format),
karner2002.txt (concatenated readme and benthic_stack.txt).

DESCRIPTION: 
Benthic stack timescale calibration notes: The O-18 data
from each core are in per mil and were species corrected to 
Cibicidoides wuellerstorfi as per Shackleton and Hall (1984).
Data are not available for entries labeled 999.00.  Ages for
each core are in kyr and were determined by tuning to obliquity 
after applying initial radioisotopic age control for marine
isotopic stages 6.0, 12.0 and the centroid of 19.  

After obliquity tuning, core tops were adjusted to age=0 ka 
then data were interpolated to 1 kyr values.  Minimally tuned 
stack is the mean O-18 value at each kyr interval for the nine 
cores; 1 sigma is 1 standard deviation from the mean.  No data 
are posted for top of stack until data from two cores are available.
Tropical stack is the mean for cores ODP Site 659, 664, 677, 846, 849, 
and core TT013-PC72; 1 sigma is 1 standard deviation from the mean.