Mathematics – Logic
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3118210s&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 18, CiteID L18210
Mathematics
Logic
12
Meteorology And Atmospheric Dynamics: Paleoclimatology, Global Change: Climate Dynamics (3309), Oceanography: General: Climate And Interannual Variability (3309), Oceanography: General: Paleoceanography, Oceanography: Biological And Chemical: Geochemistry
Scientific paper
We perform replication tests using monthly variations in Sr/Ca and δ18O in four cores from three Porites lutea coral heads from New Caledonia to assess the reproducibility of coral-based climate records. Coral Sr/Ca (δ18O) records are well correlated to each other and to the instrumental SST record (1967-1992), especially in terms of differences in the mean values of 25-year SST records (~0.2°C, Sr/Ca-SST 0.6°C, δ18O-SST). The average error associated with the coral Sr/Ca-SST (δ18O-SST) of any particular month, season or year is ~0.8°C (1.1°C), 0.6°C (0.8°C) and 0.5°C (0.6°C), respectively. ``Stacking'' or averaging the individual proxy records reduces the error between observed and predicted SST, although the reduction is small for coral Sr/Ca. Excellent reproducibility among the coral proxies implies that reliable climate records can be generated from a single coral core and that coral Sr/Ca-SST records are not compromised, beyond the errors stated herein, by non-temperature-related biological effects.
Correge Thierry
Quinn Terrence M.
Stephans Christie L.
Taylor Frederick W.
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