Nauru Island Coral Isotope Data: Readme file
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                   NOAA Paleoclimatology Program
                               and
              World Data Center A - for Paleoclimatology
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!

NAME OF DATA SET: Nauru Island Coral Isotope Data
LAST UPDATE: 8/1999 (Original Receipt by WDCA Paleo)  

CONTRIBUTORS: T. Guilderson (1,2) & D. Schrag (1)
1. 	Dept. of Earth & Planetary Sciences
	Harvard University
	Cambridge MA  02138
2.	Center for Accelerator Mass Spectrometry
	LLNL, L-397
	Livermore CA  94551

IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 1999-042

SUGGESTED DATA CITATION: T. Guilderson & D. Schrag, 1999, 
Nauru Island Coral Isotope Data, IGBP PAGES/World Data 
Center A-Paleoclimatology Data Contribution Series #1999-042. 
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. 

ORIGINAL REFERENCE: Guilderson, T.P., and D.P. Schrag, 1999,
Reliability of coral isotope records from the western Pacific
warm pool: A comparison using age-optimized records (1999PA900024)
Paleoceanography, 14, 457-464, 1999.

Additional reference including instrumental data comparison:
Guilderson, T.P., et al., J. Geophys. Res., 103, 24641-24650, 1998.

GEOGRAPHIC REGION: western tropical Pacific

PERIOD OF RECORD: 1891-1995 AD

FUNDING SOURCES: (US) NSF, Lawrence Livermore National Laboratory

LIST OF FILES: readme.nauru.txt (this file),  tab-delimited ASCII 
data files nauru1.txt, nauru2.txt, nauru3.txt. 
Variable names  DATE/OXYGEN-18O/CARBON-13C  (time/per mil/per mil)

LONGITUDE: 166E
LATITUDE:  0.5S
WATER DEPTH:  14m
CORAL SPECIES: Porites australiensis and Porites spp.
CORE LENGTH: 1.6 & 1.8 meters
DATE OF COLLECTION: July 1995

DESCRIPTION: 
Nauru coral stable isotope timeseries.
(166E, 0.5S, 14m bottom depth)

Coral stable isotope analyses on untreated, low-speed drilled samples.
Precision is ± 0.05 per mil as documented by an in-house homogenized coral
standard, and presented relative to V-PDB (NBS-19 normalized).  Oxygen isotope
data has NOT been corrected for the acid fractionation difference
("acid-alpha") between standards (calcite) and coral samples (aragonite).

Cores were taken from two ~2meter Porites corals on the north side of 
Nauru Island (166E 0.5S), 14m bottom depth, in July of 1995 by D. Schrag &
M. Moore.  Nauru-1 has been identified as Porites australiensis, Nauru-2 is 
Porites spp. Cores were split and cleaned with distilled water.  Samples were
drilled using a low-speed drill along the major vertical growth axis.

Nauru-1 (1.85 meters) was sampled sequentially at 1 mm increments for the upper
750 mm, and 5mm continous samples for the remainder.  Nauru-2 (1.61 meters) was 
sampled continously at 2 mm increments.  Data is presented to time.  The long
Nauru-1 record (Nauru WDCA pt_3) is presented as a quarterly interpolated record,
the least common sampling resolution of the whole sequence.

There are three (3) data files in this submission.
Nauru1.txt:  	Nauru-2 Full Coral Isotope Record (1898-1995)
Nauru2.txt:	Nauru-1 High-resolution Coral Isotope Record (1952-1995)
Nauru3.txt:	Nauru-1 Long Coral Stable Isotope Record (1892-1995)