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Global Change Master Directory (GCMD)
Ras Umm Sidd Oxygen Isotope (delta 18O) Data for 1750 to 1995
Entry ID: G2091


Summary
Abstract: Ras Umm Sidd bimonthly coral oxygen isotope data (coral core RUS-95). Notes on
the data: File (Ras Umm Sidd d18O.txt.) includes columns for Year AD (bimonthly
resolution: Jan-Feb, Mar-Apr, May-Jun, etc.) and coral d18O in per mil relative
to the Vienna peedee belemnite (VPDB) reference standard. The coral core was
collected in the end of November 1995 in the northern Red Sea at Ras Umm Sidd
(27deg 50.9'N, 34 deg 18.6'E) in the Ras Mohammed National Park near the
southern tip of the Sinai Peninsula (Egypt), from a 2.6-m-high coral colony
(Porites sp.) growing at a water depth of ~5.5 m. The average annual growth
rate of the coral is 1 cm/year. The average sampling resolution for oxygen
isotope analysis is more than 6 samples per year. Oxygen isotope analysis was
performed on a Finnigan MAT 251 mass spectrometer coupled to an automated
carbonate device at the stable isotope laboratory of the Department of
Geosciences at Bremen University, Germany. Long-term reproducibility for d18O,
deduced from replicate measurements of an internal carbonate standard, is
better than A?0.07 per mil. The coral chronology is constructed by setting the
maximum d18O value in a given year equal to mid-February (consistent with the
climatological minimum in sea surface temperature) and assuming a constant
coral growth rate between February of every year. Therefore we interpolated
linearly between these fixed points for further age assignments. The resulting
values were interpolated linearly to six equally spaced values per year,
providing a bimonthly resolution. The strong seasonal cycle in d18O was used to
count annual layers in the coral, supported by the consistent density banding
pattern of low-density band creation during winter and high-density band
creation during summer. The coral record extends from fall 1750 to fall 1995.
We assigned an age model error of at least 2-3 months to the coral
chronology. In addition, we assigned an age model error of A?1 year to the
interval 1924-1783 and an additional A?1 year to 1782-1750. Therefore the
chronology is assigned a cumulative age model error of less than A?3 years at
the bottom of the core. More information on the Ras Umm Sidd coral oxygen
isotope record can be found in the original reference. On-line data are
available free of charge, other forms are available for the cost of
reproduction.

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Parent DIF
This description is a member of a collection. The collection is described in
NOAA_NCDC_PALEO_2000-067


Geographic Coverage
 N: 27.85 S: 27.85  E: 34.31  W: 34.31

Data Set Citation
Dataset Creator: Thomas Felis Juergen Paetzold Gerold Wefer
Dataset Title: Ras Umm Sidd Oxygen Isotope (delta 18O) Data for 1750 to 1995
Dataset Series Name: World Data Center for Paleoclimatology Data Contribution Series
Dataset Release Date: 2000/12
Dataset Release Place: Boulder
Dataset Publisher: World Data Center for Paleoclimatology, Boulder


Temporal Coverage
Start Date: 1750-01-01
Stop Date: 1995-12-31


Location Keywords
OCEAN > INDIAN OCEAN > RED SEA > RAS UM SID
OCEAN > INDIAN OCEAN
CONTINENT > AFRICA > NORTHERN AFRICA > EGYPT


Science Keywords
PALEOCLIMATE >OCEAN/LAKE RECORDS >CORAL DEPOSITS >DELTA 180    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >CORAL DEPOSITS >DENSITY    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >CORAL DEPOSITS >LINEAR EXTENSION RATE    [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 ORIGINAL REFERENCE WHEN USING THIS DATA


Keywords
GOSIC
G3OS/
Numeric Data Sets > Paleoclimatology
Egypt > Ras Um Sid (27N034E0003)
Indian Ocean > Red Sea > Sharm el Sheikh > Ras Um Sid (27N034E0003)


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
(Click to view more)

Creation and Review Dates
DIF Creation Date: 2004-09-10
Last DIF Revision Date: 2018-05-29



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