Ras Umm Sidd Coral Oxygen Isotope Data, NOAA/NCDC/WDC Paleoclimatology
Entry ID: NOAA_NCDC_PALEO_2000-067

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Summary
Abstract: This data set consists of Ras Umm Sidd bimonthly coral oxygen isotope
data (coral core RUS-95).

[Abstract]
A 245-year coral oxygen isotope record from the northern Red Sea (Ras
Umm Sidd/Egypt, ~28 deg. N) in bimonthly resolution is presented. The
mean annual coral d18O signal apparently reflects varying proportions
of both sea surface temperature and d18Oseawater variability. In
conjunction with instrumental observations of climate the coral record
suggests for interannual and longer timescales that colder periods are
accompanied by more arid conditions in the northern Red Sea but
increased rainfall in the southeastern Mediterranean, whereas warmer
periods are accompanied by decreased rainfall in the latter and less
arid conditions in the northern Red Sea. A ~70-year oscillation of
probably North Atlantic origin dominates the coral time
series. Interannual to interdecadal variability is correlated with
instrumental indices of the North Atlantic Oscillation (NAO), the El
Nino- Southern Oscillation (ENSO), and North Pacific climate
variability. The results suggest that these modes contributed
consistently to Middle East climate variability since at least 1750,
preferentially at a period of ~5.7 years.

The coral core was collected in the end of November 1995 in the
northern Red Sea at Ras Umm Sidd (27 deg 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.

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.

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Description: Additional descriptive information on this data set


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Geographic Coverage
 N: 27.84 S: 27.84  E: 34.31  W: 34.31
 Min Depth: 0 M  Max Depth: 5.5 M

Data Set Citation
Dataset Originator/Creator: Thomas Felis, Jurgen Patzold, Gerold Wefer
Dataset Title: Ras Umm Sidd Coral Oxygen Isotope Data
Dataset Release Date: December 2000
Dataset Release Place: Boulder, CO
Dataset Publisher: IGBP PAGES/World Data Center Paleoclimatology
Issue Identification: IGBP PAGES/WDC Paleoclimatology Contribution #2000-067
Other Citation Details: NOAA/NCDC Paleoclimatology Program, Boulder CO, USA
Online Resource: http://www.ngdc.noaa.gov/paleo/pubs/felis2000/felis2000.html


Temporal Coverage
Start Date: 1750-11-01
Stop Date: 1995-11-30


Paleo_Temporal_Coverage
Paleo Start Date: 350 ybp
Paleo Stop Date: 0 ybp
Chrono Unit:


Location Keywords
OCEAN > ARCTIC OCEAN
OCEAN > INDIAN OCEAN > RED SEA
CONTINENT > AFRICA > NORTHERN AFRICA > EGYPT
CONTINENT > AFRICA > NORTHERN AFRICA
CONTINENT > ASIA > WESTERN ASIA > MIDDLE EAST
GEOGRAPHIC REGION > POLAR


Data Resolution
Temporal Resolution: bimonthly


Science Keywords
PALEOCLIMATE >OCEAN/LAKE RECORDS >CORAL DEPOSITS    [Definition]
PALEOCLIMATE >OCEAN/LAKE RECORDS >ISOTOPES    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >EL NINO SOUTHERN OSCILLATION (ENSO) >ENSO    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >NORTH ATLANTIC OSCILLATION >NAO    [Definition]
CLIMATE INDICATORS >ATMOSPHERIC/OCEAN INDICATORS >TELECONNECTIONS >PACIFIC DECADAL OSCILLATION >PDO    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
GEOSCIENTIFIC INFORMATION
OCEANS


Project
IGBP >International Geosphere-Biosphere Programme    [Information]
PAGES >Past Global Changes, IGBP    [Information]


Access Constraints
None


Use Constraints
None


Keywords
coral oxygen isotopes
Red Sea
Ras Mohammed National Park
Middle East
North Atlantic Oscillation
NAO
ENSO
El Nino Southern Oscillation
Pacific Decadal Oscillation
PDO
climate teleconnections


Data Set Progress
COMPLETE


Originating Center
NOAA/NCDC


Data Center
World Data Center for Paleoclimatology, Boulder    [Information]
Data Center URL: http://www.ncdc.noaa.gov/paleo/
Dataset ID: Data Contribution Series #2000-067

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
Distribution_Media: online www, ftp
Distribution_Format: ascii
Fees: none


Personnel
THOMAS FELIS
Role: INVESTIGATOR
Contact Address:
Fachbereich Geowissenschaften
Universitat Bremen
Bibliohekstrase 1
City: Bremen
Postal Code: 28359
Country: Germany


JURGEN PATZOLD
Role: INVESTIGATOR
Contact Address:
Fachbereich Geowissenschaften
Universitat Bremen
City: Bibliohekstrase
Province or State: Bremen
Postal Code: 1-28359
Country: GERMANY


GERALD WEFER
Role: INVESTIGATOR
Contact Address:
Fachbereich Geowissenschaften
Universitat Bremen
City: Bibliohekstrase
Province or State: Bremen
Postal Code: 1 - 28359
Country: GERMANY


Publications/References
Felis, T., J. Patzold, 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.

Rimbu, N., G. Lohmann, T. Felis, and J. PC$tzold, 2001, Arctic
Oscillation signature in a Red Sea coral. Geophysical Research
Letters, 28, 2959-2962.

Rimbu, N., G. Lohmann, T. Felis, and J. Patzold, 2003, Shift in ENSO
teleconnections recorded by a northern Red Sea coral, Journal of
Climate, 16, 1414-1422.

Creation and Review Dates
DIF Creation Date: 2003-04-22
Last DIF Revision Date: 2009-01-21

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