Site 502 North Atlantic Deep Water d13C Data: Readme file
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                   NOAA Paleoclimatology Program
                               and
              World Data Center for Paleoclimatology, Boulder
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!

NAME OF DATA SET: Site 502 North Atlantic Deep Water d13C Data 

LAST UPDATE: 3/2000 (Original Receipt by WDCA Paleo)  
CONTRIBUTOR: Delia Oppo, WHOI.

IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2000-023

SUGGESTED DATA CITATION: Oppo, D. et al, 2000, 
Site 502 North Atlantic Deep Water d13C Data, 
IGBP PAGES/World Data Center A for Paleoclimatology 
Data Contribution Series #2000-023. 
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. 

ORIGINAL REFERENCES: Oppo, D. W., M. E. Raymo, G. P. Lohmann, 
A. C. Mix, J. D. Wright, and W. B. Prell, 1995,  
A d13C record of Upper North Atlantic Deep Water during 
the past 2.6 myrs, Paleoceanography, 10, 395-414, 1995.

de Menocal, P. B., D. W. Oppo, R. G. Fairbanks, and W. Prell, 1992,
A 1.2 Myr record of mid-depth d13C variability in the North Atlantic:
Relationships between climate, ocean circulation, and 
atmospheric CO2, Paleoceanography, 7, 229-250, 1992.

Ostermann, D. R. and Curry, W.B., 2000, 
Calibration of Stable Isotopic Data: An Enriched Delta 18-O 
Standard Used for Source Gas-Mixing Detection and Correction, 
Paleoceanography, v.15, No. 3, pp.353-360, June 2000. 

FUNDING SOURCE: National Science Foundation, USA

GEOGRAPHIC REGION: North Atlantic 
PERIOD OF RECORD: 0-2.6 MMYrBP

LIST OF FILES: Readme.Oppo1995b.txt (this file), 
502.pub.data.txt, 502.new.data.txt (tab-delimited ASCII format).

DESCRIPTION:
DSDP Site 502 North Atlantic Deep Water d13C Data 
DSDP Site 502: 11N 80W 3051 m.

The Site 502 data, as published in Oppo (1995) and de Menocal (1992), 
are in a file named 502.pub.data.txt.  In the Oppo et al. publication, 
we point out that a correction was necessary to bring the WHOI data 
in alignment with the LDEO data.  At the time, WHOI did not apply 
a correction for mixing within the source of the reference gas 
and sample gas.  This correction has now been applied to the 502 data, 
and are in a file called 502.new.data.txt.  If these data are used, 
the two papers above should be referenced, as well as Ostermann (2000).

In the Oppo et al., 1995 publication, only samples which produced 
a voltage of ~2V or greater were included.  Data collected at 
lower voltage are included in the 502.new.data.txt file, 
and the user is welcomed to choose her or his own cutoff.