High Pacific Native Quinn-1

Core/Site name:

Amedee Lighthouse

Country/Region:

Noumea, New Caledonia

Elevation:

-3

Archive:

corals

Species:

Porites lutea

Proxy measurement:

d13C, d18O

Sampling resolution:

seasonal

Dating information:

seasonal variability in d18O and annual band counting

Startyear:

AD 1657

Endyear:

AD 1992

Description:

A 335 year stable isotope record from a New Caledonia coral (22°S, 166°E) helps fill a large gap in historical climate reconstructions. Although the long-term coral δ18O-based sea surface temperature (SST) trend is one of warming, there are notable decadal fluctuations, especially in the early 18th and early 19th centuries. Mean annual SSTs between 1658 and 1900 are estimated to be ∼0.3°C lower than the 20th century average, with interdecadal excursions of 0.5°–0.8°C. Time series analyses of the coral isotope record reveals significant concentrations of variance in the El Niño band; an inderdecadal spectral peak is present, but its robustness requires additional statistical evaluation. A secular but irregular decrease in coral δ13C values begins in the mid-1800s and may reflect the anthropogenic perturbation of the carbon reservoir. These and other results indicate that the New Caledonia coral isotope record is a valuable source of information on southwest Pacific climate history.

Data entered by name:

Wu, Henry

Data entered by email:

This email address is being protected from spambots. You need JavaScript enabled to view it.

Main reference(s):

Quinn, T. M., T. J. Crowley, F. W. Taylor, C. Henin, P. Joannot, and Y. Join (1998), A multicentury stable isotope record from a New Caledonia coral: Interannual and decadal sea surface temperature variability in the southwest Pacific since 1657 A.D, Paleoceanography, 13(4), 412–426, doi:10.1029/98PA00401

Link to reference 1:

http://www.agu.org/pubs/crossref/1998/98PA00401.shtml

Data storage link 1:

http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:517690712463461::::P1_STUDY_ID:1843

Current dating method:

-- select --

Annual snow acc rate:

-- select --

Category: Ocean2k