noaa-coral-12973
New Caledonia Coral Proxy Data Sampling Resolution Comparison
DeLong, K.L.; Quinn, T.M.; Taylor, F.W.
New Caledonia Coral Proxy Data Sampling Resolution Comparison
2012-06-05
NCDC-Paleoclimatology
ONLINE Files
Pending
https://www.ncdc.noaa.gov/paleo/study/12973
Investigator
K.L.
DeLong
Investigator
T.M.
Quinn
Investigator
F.W.
Taylor
earth science
paleoclimate
corals and sclerosponges
delta 18O,Porites lutea,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
corals and sclerosponges
depth,null,null,centimeter,null,corals and sclerosponges,corrected,null,N,corrected for intercore alignment
earth science
paleoclimate
corals and sclerosponges
delta 13C,Porites lutea,null,per mil VPDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null
earth science
paleoclimate
corals and sclerosponges
sample identification,null,null,null,null,corals and sclerosponges,null,null,N,null
earth science
paleoclimate
corals and sclerosponges
strontium/calcium,Porites lutea,null,millimole per mole,null,corals and sclerosponges,raw,inductively-coupled plasma atomic emission spectroscopy,N,null
earth science
paleoclimate
corals and sclerosponges
magnesium/calcium,Porites lutea,null,millimole per mole,null,corals and sclerosponges,raw,inductively-coupled plasma atomic emission spectroscopy,N,null
earth science
paleoclimate
corals and sclerosponges
depth,null,null,centimeter,null,corals and sclerosponges,null,null,N,null
earth science
paleoclimate
corals and sclerosponges
geoscientificInformation
1942 AD
1951 AD
8 cal yr BP
-1 cal yr BP
Complete
-22.48
-22.48
166.47
166.47
Ocean
Pacific Ocean
South Pacific Ocean
Melanesia
New Caledonia
Amedee Lighthouse>LATITUDE -22.48>LONGITUDE 166.47
None
Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.
English
DOC/NOAA/NESDIS/NCEI
National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
https://www.ncdc.noaa.gov/data-access/paleoclimatology-data
DATA Center Contact
Bruce
Bauer
bruce.a.bauer@noaa.gov
paleo@noaa.gov
303-497-6280
303-497-6513
325 Broadway, E/NE31
Boulder
CO
80305-3328
USA
online
ASCII
DeLong, K.L., T.M. Quinn, and F.W. Taylor. 2007.
Reconstructing twentieth-century sea surface temperature variability
in the southwest Pacific: A replication study using multiple coral
Sr/Ca records from New Caledonia.
Paleoceanography, 22, PA4212, doi:10.1029/2007PA001444.
Coral-based climate reconstructions typically have not used multiple
cores from a region to capture and replicate a climate signal largely
because of concerns of coral conservation, analytical expense,
and time constraints. Coral Sr/Ca reproducibility through the twentieth
century was investigated using three intracolony and three intercolony
coral records from the reefs offshore of Amédée Island, New Caledonia.
Different sampling resolutions were examined in coral Sr/Ca (fortnightly
and monthly) and d18O (fortnightly, monthly, and seasonally) as well as
similar scale subsampling of the daily in situ sea surface temperature
(SST) record. The mean coral Sr/Ca, d18O, and SST values do not change
as a function of sampling resolution. The coral Sr/Ca signal is highly
reproducible; the average absolute offset between coeval monthly Sr/Ca
determinations between any two coral time series is 0.035 ± 0.026
mmol/mol (1s) (~0.65°C), which is less than twice the analytical
precision of the coral Sr/Ca measurements. The stack average of the
monthly coral Sr/Ca variations and monthly anomalies are significantly
correlated with monthly in situ SST (1967-1992; r = -0.96 and -0.64,
respectively; p < 0.05; and n = 302) and 1° grid monthly SST data
product (1900-1999; r = -0.95 and -0.56, respectively; p < 0.05;
and n = 1198). The coral Sr/Ca-SST reconstruction exhibits interannual
and decadal- timescale fluctuations that exceed those observed in the
gridded SST record, which may reflect true differences between SST
at a shallow reef site and those averaged over a 1° grid box
or inadequacies in the methodology used to create the gridded SST
product when few observations are available. A warming trend of
~0.6°C is observed in the twentieth century coral Sr/Ca-SST record.
STUDY NOTES: Sampling resolution comparison for corals collected at Amédée Island,
New Caledonia. Seasonal, Monthly, and Fortnightly sampling of coral
Sr/Ca, Mg/Ca, d18O, and d13C for 1942-1951 AD.
The data from the sampling resolution comparison (~seasonal,
~monthly, and ~fortnightly) between parallel paths presented
in Figure 3 of DeLong et al. 2007. Note: the reminder of the data
presented in the study of DeLong et al., 2007 is available in another
contribution and cited as DeLong et al., 2012. The coral section,
92-PAA1-B, was originally sampled at 0.28 cm per sample (seasonally)
by Quinn et al. 1998. The study of DeLong et al. 2007 sampled the coral
slab on either side of the Quinn et al. 1998 path (<0.5 cm) with
increasing resolution: 0.0692 cm per sample (monthly) and 0.030 cm
per sample (fortnightly) down the core. Refer to figure 2 in
DeLong et al. (2007) for sampling path location on the core,
which is 1942 to 1951 AD. Coral samples were analyzed for d18O,
d13C, Sr/Ca, and Mg/Ca with an analytical precision (1S) of ±0.06‰,
±0.04‰, ±0.017 mmol mol-1, and ±0.024 mmol mol-1, respectively.
Note: these Mg/Ca data were not shown or discussed in
DeLong et al. 2007; however, these data are provided here
for completeness. For Figure 3 in DeLong et al. (2007),
the fortnightly Sr/Ca depth was adjusted to align with monthly
Sr/ Ca variations, and depth adjustments were applied to other
geochemical records; these adjustments are shown in columns labeled
"Aligned depth (cm)." The same method of adjustments was applied to
the seasonal records using monthly d18O depth. Comparisons are based
on depths common to all resolutions (gray rectangle). Mean coral
Sr/Ca, d18O, and d13C values do not change significantly as a function
of sampling resolution; however, the averages of the summer and winter
amplitudes determined for each sampling resolution reveal a decrease
in seasonal cycle with decreasing sampling resolution.
Amédée Island, New Caledonia: 22°28.5'S, 166°28'E, water depth 3 m.
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/amedee2007.txt
GET DATA
https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/amedee2007.xls
USA/NOAA
DIF
Version 9.8.4
2018-12-11
2018-12-11