North Atlantic Isotopic and Trace Element Data: Readme file
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              World Data Center for Paleoclimatology, Boulder
                                and 
                   NOAA Paleoclimatology Program
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!

NAME OF DATA SET: North Atlantic Isotopic and Trace Element Data 

LAST UPDATE: 4/2000 (Original Receipt by WDCA Paleo)  
CONTRIBUTOR: W. B. Curry, Woods Hole Oceanographic Institution

IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2000-031

SUGGESTED DATA CITATION: Curry, W. B. et al, 2000, 
North Atlantic Isotopic and Trace Element Data , 
IGBP PAGES/World Data Center A for Paleoclimatology 
Data Contribution Series #2000-031.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. 

ORIGINAL REFERENCE:  Curry, W. B., T. M. Marchitto, J. F. McManus, 
D. W. Oppo, and K. L. Laarkamp, 1999, 
Millennial-scale changes ventilation of the thermocline, 
intermediate and deep waters of the Glacial North Atlantic, 
Geophysical Monograph 112, pp. 59-76, 1999.


GEOGRAPHIC REGION: North Atlantic
PERIOD OF RECORD: 60 KYrBP-Present

LIST OF FILES: Readme.Curry1999.txt (this file),
cdw_103ggc.calendar.txt, cibs_103ggc.calendar.txt, cibs_v29204.calendar.txt,
pachyl_v29204.calendar.txt, jpc1_cibs.all.140.txt, jpc1_sac.all.140.txt,
jpc2_cibs.all.140.txt, jpc3_cibs.all.140.txt, chapman.conference.txt,
cdw_103ggc.all.calendar.txt, cibs_103ggc.all.calendar.txt,
cibs_v29204.all.calendar.txt, elegans_103ggc.calendar.txt, jpc1_cibs.140.txt,
jpc1_sac.140.txt, jpc2_cibs.140.txt, jpc3_cibs.140.txt.


DESCRIPTION: 
Calibration to VPDB
The data are presented with respect to VPDB based on an published values for 
NBS-19 of -2.20 for 18O and 1.95 for 13C.  The methods for conversion to VPDB 
are described in:

Ostermann, D. R. and W. B. Curry, Calibration of stable isotope data: 
An enriched 18O standard used for source gas mixing detection and correction, 
Paleoceanography, v. 15, pp. 353-360, 2000.

Trace metal methods:
The methods used to produce the trace metal analyses are presented in:

Marchitto, T. M., W. B. Curry, and D. W. Oppo, Millennial-scale changes in 
North Atlantic circulation since the last glaciation, 
Nature, v. 393, pp. 557-561, 1998.

Marchitto, T. M., Zinc and cadmium in benthic foraminifera as tracers of 
ocean paleochemistry (Thesis), 
MIT/WHOI Joint Program in Oceanography, 203 pp., 2000.

There are seventeen files in the data set:

chapman.conference.txt:  Complete, original published stable isotope data 
set as published in Curry et al. (1999).

Column 1:  Core label
Column 2:  taxonomic label (genus)
Column 3:  taxonomic label (species)
Column 4:  Depth in core (cm)
Column 5:  13C with respect to VPDB 
Column 6:  18O with respect to VPDB

jpc1_cibs.all.140.txt:  File containing all benthic isotope data, 
including all samples measured at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


jpc1_cibs.140.txt:  File containing benthic isotope data averaged 
at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


jpc2_cibs.all.140.txt:  File containing all benthic isotope data, 
including all samples measured at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


jpc2_cibs.140.txt:  File containing benthic isotope data averaged 
at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


jpc3_cibs.all.140.txt:  File containing all benthic isotope data, 
including all samples measured at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


jpc3_cibs.140.txt:  File containing benthic isotope data averaged 
at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


jpc1_sac.all.140.txt:  File containing all G. sacculifer isotope data, 
including all samples measured at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


jpc1_sac.140.txt:  File containing G. sacculifer isotope data averaged 
at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


cibs_103ggc.all.calendar.txt:  File containing all benthic (Cibicidoides) 
isotope data, including all samples measured at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


cibs_103ggc.calendar.txt:  File containing benthic (Cibicidoides) 
isotope data averaged at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


elegans_103ggc.calendar.txt:  File containing benthic (Hoeglundina) 
isotope data averaged at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


cibs_v29204.all.calendar.txt:  File containing all benthic (Cibicidoides) 
isotope data, including all samples measured at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


cibs_v29204.calendar.txt:  File containing benthic (Cibicidoides) 
isotope data averaged at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


pachyl_v29204.calendar.txt:  File containing N. pachyderma (l) 
isotope data averaged at each stratigraphic level.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  13C with respect to VPDB
Column 4:  18O with respect to VPDB


cdw_103ggc.all.calendar.txt:  File containing all benthic trace metal data, 
presented as estimated sea water concentrations of cadmium.

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  Cdw (estimated cadmium concentration in sea water)


cdw_103ggc.calendar.txt:  File containing averaged benthic trace metal data, 
presented as estimated sea water concentrations of cadmium

Column 1:  Depth in core (m)
Column 2:  Age (ka) using the published chronology
Column 3:  Cdw (estimated cadmium concentration in sea water)