Great Barrier Reef Composite Sr/Ca, U/Ca and d18O Data
Entry ID:
NOAA_NGDC_PALEO_SALINITY
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Summary
Abstract:
[from the online data set description] Coral Sr/Ca, U/Ca and delta-18O records were replicated from eight massive Porites colonies, spanning 120 to 420 years of continuous growth. The cores were collected at seven reefs, 12 to 120 km apart, from the central Great Barrier Reef, Australia and drilled between 1984 and 1988. The use of multiple cores allowed us to test the fidelity of individual ... tracers over century time scales and to
establish regional-scale proxy climate signals. A 'master'
reconstruction for each of the three proxies was calculated by
normalizing all records relative to the longest continuous record, and
then taking the average of all eight cores to construct the delta-18O
composite record, while the U/Ca and Sr/Ca composite records were
calculated from the average of seven cores. A confidence envelope was
calculated using 95% confidence intervals for each pentannual period.
A 373-year chronology for eight, multi-century, Porites coral cores
was developed using cross-dating techniques adapted from
dendrochronology.
Five-year bulk increments were sampled for equivalent periods across
all eight cores from 1565-1570 to 1980-1985 (Austral winter to
winter).
The 420-year history of strontium/calcium, uranium/calcium, and oxygen
isotope ratios in eight coral cores indicates that sea surface
temperature and salinity were higher in the 18th century than the 20th
century. An abrupt freshening after 1870 occurred simultaneously
throughout the southwestern Pacific, coinciding with cooling tropical
temperatures. Higher salinities between 1565 and 1870 are best
explained by a combination of advection and wind-induced evaporation
resulting from a strong latitudinal temperature gradient and
intensified circulation. The global Little Ice Age glacial expansion
may have been driven, in part, by greater poleward transport of water
vapor from the tropical Pacific. 
Related URL
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Description:
Access to Sr/Ca, U/Ca and d18O data and documentation.
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Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
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N: -17.0
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S: -19.0
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E: 147.1
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W: 146.1
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Data Set Citation
Dataset Originator/Creator:
Hendy, E.J., M.K. Gagan, C.A. Alibert, M.T. McCulloch, J.M. Lough, P.J. Isdale
Dataset Title:
Great Barrier Reef Composite Sr/Ca, U/Ca and d18O Data
Dataset Release Date:
2002
Dataset Release Place:
Boulder, CO
Dataset Publisher:
IGBP PAGES/World Data Center for Paleoclimatology
Issue Identification:
Data Contribution Series #2002-009
Other Citation Details:
NOAA/NGDC Paleoclimatology Program
Online Resource:
http://www.ncdc.noaa.gov/paleo/pubs/hendy2002/hendy2002.html
Temporal Coverage
Start Date:
1565-01-01
Stop Date:
1985-12-31
Data Resolution
Temporal Resolution:
annual
Quality
See:
Hendy, E.J., M.K. Gagan, C.A. Alibert, M.T. McCulloch, J.M. Lough,
P.J. Isdale, 2002, Abrupt decrease in tropical Pacific sea surface
salinity at end of Little Ice Age. Science, v.291 (5559),
pp. 1511-1514, February 22, 2002
Access Constraints
None
Use Constraints
Cite original reference when using this data:
Hendy, E.J., M.K. Gagan, C.A. Alibert, M.T. McCulloch, J.M. Lough,
P.J. Isdale, 2002, Abrupt decrease in tropical Pacific sea surface
salinity at end of Little Ice Age. Science, v.291 (5559),
pp. 1511-1514, February 22, 2002
Data Set Progress
COMPLETE
Distribution
Distribution Media:
online www, ftp
Fees:
none
Personnel
Role:
INVESTIGATOR
Email:
Erica.Hendy at anu.edu.au
Contact Address:
Research School of Earth Sciences
Australian National University
City:
Canberra
Province or State:
ACT
Postal Code:
0200
Country:
Australia
Role:
INVESTIGATOR
Contact Address:
Research School of Earth Sciences
Australian National University
City:
Canberra
Postal Code:
ACT 0200
Country:
Australia
Role:
INVESTIGATOR
Contact Address:
Research School of Earth Sciences
Australian National University
City:
Canberra
Province or State:
ACT
Postal Code:
0200
Country:
Australia
Role:
INVESTIGATOR
Contact Address:
Research School of Earth Sciences
Australian National University
City:
Canberra
Postal Code:
ACT 0200
Country:
Australia
Role:
INVESTIGATOR
Contact Address:
Australian Institute of Marine Science
City:
Townsville
Province or State:
Queensland
Postal Code:
4810
Country:
Australia
Role:
INVESTIGATOR
Contact Address:
Australian Institute of Marine Science
City:
Townsville
Province or State:
Queensland
Postal Code:
4810
Country:
Australia
Publications/References
Hendy, E.J., M.K. Gagan, C.A. Alibert, M.T. McCulloch, J.M. Lough,
P.J. Isdale, 2002, Abrupt decrease in tropical Pacific sea surface
salinity at end of Little Ice Age. Science, v.291 (5559),
pp. 1511-1514, February 22, 2002
Creation and Review Dates
DIF Creation Date:
2002-04-11
Last DIF Revision Date:
2007-02-06
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