Ras Umm Sidd Oxygen Isotope (delta 18O) Data for 1750 to 1995

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Title: Ras Umm Sidd Oxygen Isotope (delta 18O) Data for 1750 to 1995
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 (27 deg 50.9 min N, 34 deg 18.6 min 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 +/- 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 +/- 1 year to the interval 1924-1783 and an additional +/- 1 year to 1782-1750. Therefore the chronology is assigned a cumulative age model error of less than +/- 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.
  1. How should this data set be cited?

    Felis, Thomas, Póótzold, Jóórgen, and Wefer, Gerold, 200012, Ras Umm Sidd Oxygen Isotope (delta 18O) Data for 1750 to 1995: World Data Center for Paleoclimatology Data Contribution Series 2000-067, World Data Center for Paleoclimatology, Boulder, Boulder.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: 34.31
    East_Bounding_Coordinate: 34.31
    North_Bounding_Coordinate: 27.85
    South_Bounding_Coordinate: 27.85

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  4. Does the data set describe conditions during a particular time period?

    Ending_Date: 1995
    Currentness_Reference: Publication Date

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  7. How does the data set describe geographic features?

    coral variable
    coral variable (Source: coral variable)

    delta 18O (per mil) relative to PDB (Source: Craig, H., 1957. Isotopic standards for mass spectrometric analysis of carbon dioxide. Geochimica Cosmochimica Acta, 12:113-140)

    Range of values
    Units:per mil

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  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Felis, T., J. Pótzold, Y. Loya, M. Fine, A. H. Nawar, and G. Wefer, 2000, A coral oxygen isotope record from the northern Red Sea documenting NAO, ENSO, and North Pacific teleconnections on Middle East climate variability since the year 1750. Paleoceanography, 15, 679-694.

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Why was the data set created?

Paleoclimatic Research

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Access_Constraints: None

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    NOAA Paleoclimatology Program
    Data Manager
    325 Broadway, Code E/CC23
    Boulder, Colorado 80305-3328

    (303) 497-6280 (voice)
    (303) 497-6513 (FAX)

    Hours_of_Service: 9-5 MST Monday-Friday
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    Other Documents

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    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.

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Last modified: 24-Jan-2017
Last Reviewed: 31-Mar-2011
Metadata author:
NOAA Paleoclimatology Program
Data Manager
325 Broadway, Code E/CC23
Boulder, Colorado 80305-3328

(303) 497-6280 (voice)
(303) 497-6513 (FAX)

Hours_of_Service: 9-5 MST Monday-Friday
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.13 on Tue Oct 17 09:43:01 2017