SPECMAP Archive #1: Specmap1.readme
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               World Data Center A- Paleoclimatology
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NOTE: PLEASE CITE ORIGINAL REFERENCES WHEN USING THIS DATA!!!!!


NAME OF DATA SET:  SPECMAP Archive #1
UPDATE HISTORY:  2/90 (Original receipt date by WDC-A Paleo) 
                 9/94 (Addition of *.csv files)
CONTRIBUTORS: J. Imbrie, A. Duffy, et al , Brown University
IGBP PAGES/WDCA Data Contribution Series #:  90-001
SUGGESTED DATA CITATION: 
Imbrie, J., et al, 1990, SPECMAP Archive #1.  IGBP PAGES/World Data Center-A 
for Paleoclimatology Data Contribution Series # 90-001.  
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

ORIGINAL REFERENCES:
"Oceanic Response to Orbital Forcing in the Late Quaternary: 
Observational and Experimental Strategies", by J. Imbrie, A. 
McIntyre, and A. C. Mix.  in 'Climate and Geosciences, A Challenge 
for Science and Society in the 21st Century', A. Berger, S. H. 
Schneider, and J.-C. Duplessy, eds., D. Reidel Publishing Company.

"Surface water response of the equatorial Atlantic Ocean to orbital 
forcing" McIntyre et al., 1989, Paleoceanography, v. 4, p. 19-55.


GEOGRAPHIC REGION: Global
PERIOD OF RECORD: 0-400,000 YBP
LIST OF FILES:  101 original SPECMAP data files, see SPECMAP.doc
for contents of each file, 15 *.csv comma-delimited ascii files.

DESCRIPTION:
This directory contains 101 SPECMAP files, including planktonic 
counts and isotope values, age and sea surface temperature models, 
and SST estimates.  These data were compiled by J. Imbrie  and A. 
Duffy at Brown University for the SPECMAP project.  See 
SPECMAP.DOC for a complete description of the archive, which is 
summarized below:  

This archive, prepared as part of the NSF-funded SPECMAP Project, 
contains climatic time series of the past 400,000 years, as well as basic 
downcore and core-top data from which these time series are derived.  
Downcore records include (1) quantitative data on planktonic species 
and assemblages which reflect conditions in the surface waters of the 
Atlantic Ocean; (2) estimates of sea-surface temperature derived from 
these faunal data; and (3) measurements of O-18, C-13 difference 
(planktic and benthic), and Cd/Ca.  The age model used to transform 
each downcore record into a time series by correlation of its O-18 
record with the published O-18 chronology of Imbrie et al. (1984) is 
given.  Time series with uniformly spaced samples may be calculated 
by linear interpolation.  The O-18 chronologies of Imbrie et al. (1984) 
and Martinson et al.  (1987) are given for reference, as well as orbital 
time series taken from the work of Berger (1978a,b).  Also archived 
are N. G. Kipp's Atlantic core-top foraminiferal data and SST 
equations FA20 and UW7 derived from them by procedures described 
in Kipp (1976).

Bruce Bauer of WDC-A created 15 ASCII *.csv files of the SPECMAP1 data
in September 1994.  *.csv files are comma-delimited ASCII files which
can be read into most spreadsheet or database programs.  Each  of the
*.csv contains data for a single parameter in the SPECMAP archive #1,
such as del 18O or age models.  Please consult SPECMAP.doc for details
on the contents and methodology of these data.