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Global Change Master Directory (GCMD)
Otter Reef Extension, Density, and Calcification Data for 1792 to 1987
Entry ID: G2024


Summary
Abstract: Extension, Density, and Calcification data from 35 Porites coral cores covering
the entire length of the Great Barrier Reef, Australia. Data set contains 35
individual core data sets plus time series 1746-1982 of average calcification
rate for 10 of these sites. The Australian Institute of Marine Science began
collecting cores from very large massive colonies of Porites on the Great
Barrier Reef in the early 1980s. Such cores cannot normally be identified to
species. The cores were mounted and sawn to remove slices that were about 6-7mm
thick. All slices were X-rayed and skeletal density measured along a central
track on each slice using a gamma densitometer. The high density portion of
annual density bands in Porites from the Great Barrier Reef appears to form
usually between October and March, the Southern Hemisphere summer. Peaks in the
density profiles were successively counted backwards from the last (outermost
or youngest) peak. Density was assumed to peak in January and the most recent
peak was dated from the date of collection of the core. Dates were then
assigned to all peaks in the series. Time series of the following skeletal
growth parameters were then obtained: 1) Average annual density (g.cm-3) 2)
Annual linear extension measured between high density peaks (cm.yr-1) 3) Annual
calcification (g.cm-2.yr-1_; the product of annual average density and annual
linear extension. These data were obtained from coral cores taken at 35 sites
on the Great Barrier Reef. The density profiles do not always display
regular, obvious annual peaks and we could not be absolutely sure of the dating
for some profiles. We consider there may be errors of + or - 2-3 years in the
starting data of some of these series. File AIMS10CoreAvg.txt: Time series of
average calcification rate is based on 10 Porites corals for 1746-1982: Jeannie
River, Flinders Reef, Brook Island, Britomart Reef, Lodestone Reef, Wheeler
Reef, Havannah Island, Hook Island, Sanctuary Reef, and Abraham Reef. 3 series
are presented: 1) Annual average values expressed as standardized anomalies;
each of the 10 series was converted to standardized anomalies with respect to
1934-1982 mean and sd; resulting series then averaged for 10 corals. 2) Annual
average standardized anomalies filtered with 5-year gaussian filter. 3) Annual
average series converted to original calcification units (g.cm-2.yr-1) filtered
with 5-year gaussian filter. Because of potential dating errors the last two
series are considered to be most reliable. Lough and Barnes (1997) suggest that
~30% of the variance in the 10-coral calcification series can be explained by
variations of annual sea-surface temperature.
On-line data are available free of charge, other forms are available for the
cost of reproduction

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Geographic Coverage
 N: -18.05 S: -18.05  E: 146.58  W: 146.58

Data Set Citation
Dataset Creator: Janice Lough
Dataset Title: Otter Reef Extension, Density, and Calcification Data for 1792 to 1987
Dataset Series Name: World Data Center for Paleoclimatology Data Contribution Series
Dataset Release Date: 2001/03
Dataset Release Place: Boulder
Dataset Publisher: World Data Center for Paleoclimatology, Boulder


Temporal Coverage
Start Date: 1972-01-01
Stop Date: 1987-12-31


Location Keywords
OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN > OTTER REEF
CONTINENT > AUSTRALIA/NEW ZEALAND > AUSTRALIA


Science Keywords
PALEOCLIMATE >OCEAN/LAKE RECORDS >CORAL DEPOSITS >LINEAR EXTENSION RATE    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >CORAL DEPOSITS >CALCIFICATION    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
OCEANS


Project
ESIP >Earth Science Information Partners Program    [Information]


Quality
Disclaimer- While every effort has been made to ensure that these data are
accurate and reliable within the limits of the current state of the art, NOAA
cannot assume liability for any damages caused by any errors or omissions in
the data, nor as a result of the failure of the data to function on a
particular system. NOAA makes no warranty, expressed or implied, nor does the
fact of distribution constitute such a warranty.


Access Constraints
None


Use Constraints
Please cite orgininal reference when using this data


Keywords
GOSIC
G3OS/
Paleoclimate > Coral Records > linear extension rate
Paleoclimate > Coral Records > density
Paleoclimate > Coral Records > calcification
Paleoclimatology
Pacific Ocean > Coral Sea > Great Barrier Reef > Otter Reef (18S146E0016)
Australia > Queensland > Central Section > Otter Reef (18S146E0016)


Data Set Progress
COMPLETE


Originating Center
NOAA/NGDC


Data Center
World Data Center for Paleoclimatology, Boulder    [Information]
Data Center URL: http://www.ncdc.noaa.gov/paleo/

Data Center Personnel
Name: WDC/PALEOCLIMATOLOGY, BOULDER
Phone: +1 (303) 497-6160
Fax: +1 (303) 497-6513
Email: paleo at noaa.gov
Contact Address:
World Data Center for Paleoclimatology
NOAA/NCDC Code E/GCx3
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA



Distribution
Fees: On-line data are available free of charge


Personnel
WDC/PALEOCLIMATOLOGY, BOULDER
Role: TECHNICAL CONTACT
Phone: +1 (303) 497-6160
Fax: +1 (303) 497-6513
Email: paleo at noaa.gov
Contact Address:
World Data Center for Paleoclimatology
NOAA/NCDC Code E/GCx3
325 Broadway
City: Boulder
Province or State: CO
Postal Code: 80303
Country: USA


Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2004-09-07
Last DIF Revision Date: 2018-05-29



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