Malindi, Kenya Stable Isotope Data (delta 18O, delta 13C) for 1801-1994

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Cole, J.E.
Originator: Dunbar, R.B.
Originator: McClanahan, T.R.
Publication_Date: 200007
Title:
Malindi, Kenya Stable Isotope Data (delta 18O, delta 13C) for 1801-1994
Series_Information:
Series_Name: World Data Center for Paleoclimatology Data Contribution Series
Issue_Identification: 2000-050
Publication_Information:
Publication_Place: Boulder
Publisher: World Data Center for Paleoclimatology, Boulder
Description:
Abstract:
Malindi annual oxygen isotopic composition, 1801-1994. Notes on the data: File includes columns for Year AD, Coral d18O, and SST (degrees C). The SST data are sparse as they were screened using the procedures described below. The coral used in this study grew (and still does grow) in Malindi Marine Park, Kenya (3 degrees S, 40 degrees E). The colony lies at a depth of ~6m (low tide) and is about 4m in height. Annual growth rates are roughly 12mm/yr. Oxygen isotopic data are from annual increments of coral skeleton that were cut according to annual density bands that are clearly visible in the core. Annual chunks were crushed and homogenized; isotopic values represent the average of duplicate or triplicate samples. Because samples were taken with respect to visible annual density banding, there is no depth scale for this record. Density and fluorescent banding can be viewed at <http://www.ngdc.noaa.gov/paleo/outreach/coral/image/malindix-ray.jpg> (Core Mal 96-1 is taken from the same colony as the core used to generate this dataset.) Annual density banding is unambiguous in this core, so annual assignments are precise. The annual samples represent a year that is roughly November thru October. (The year assigned is the year of the January, not the year of the November, that is included in that interval). However, if cuts were not precisely along the October-November boundary, small (1-2 month) offsets in the months assigned to an annual sample may have occurred. Stable isotope samples were analyzed on three isotope ratio mass spectrometers: a VG 602 with SIRA-series electronics at Rice University, a VG-SIRA with automated carbonate preparation device, and a Micromass Optima with automated carbonate preparation device, the latter two at the University of Colorado/Boulder (INSTAAR). Each measurement has an analytical uncertainty of 0.08 degrees; the differences between duplicate samples were above 0.18 degrees in only 2 of 195 cases, confirming inter-lab and inter-instrument calibrations. We calibrate the coral d18O to the enhanced COADS SST from 3 degrees S, 41 degrees E, which has a broader screening tolerance than the standard COADS (4.5 sigma vs. 3.5 sigma) to capture larger anomalies. COADS enhanced data are provided by the NOAA-CIRES Climate Diagnostics Center, Boulder, Colorado, from their web site at <http://www.cdc.noaa.gov/>. We use annual SST data representing a Nov.-Oct. year and include only years that contain at least three observations from every month; this procedure yields a slope of 0.256 degrees per 1 degree C and explains 47% of the SST variance. The details of the calibration procedure have little effect on the paleotemperature slope: using the standard SST product instead of the enhanced yields a slope of -0.228; omitting the minimum requirement of three observations per month yields a slope of 0.262 for the enhanced COADS and 0.252 for the standard. These correlations are all significant at >99.9%.
Purpose: Paleoclimatic Research
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1801
Ending_Date: 1994
Currentness_Reference: Publication Date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None Planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: 39.95
East_Bounding_Coordinate: 40.183
North_Bounding_Coordinate: -3.233
South_Bounding_Coordinate: -3.417
Keywords:
Theme:
Theme_Keyword_Thesaurus: CoRIS Theme Thesaurus
Theme_Keyword: EARTH SCIENCE > Paleoclimate > Coral Records > Delta 18O
Theme_Keyword: EARTH SCIENCE > Paleoclimate > Coral Records > Temperature
Theme_Keyword: EARTH SCIENCE > Paleoclimate > Coral Records > Density
Theme_Keyword: EARTH SCIENCE > Paleoclimate > Coral Records > Fluorescence
Theme:
Theme_Keyword_Thesaurus: CoRIS Discovery Thesaurus
Theme_Keyword: Numeric Data Sets > Paleoclimatology
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: climatologyMeteorologyAtmosphere
Theme_Keyword: 004
Place:
Place_Keyword_Thesaurus: CoRIS Place Thesaurus
Place_Keyword: OCEAN BASIN > Indian Ocean > Malindi (03S040E0001)
Place_Keyword: COUNTRY/TERRITORY > Kenya > Kilifi > Malindi (03S040E0001)
Temporal:
Temporal_Keyword_Thesaurus: CoRIS Temporal Thesaurus
Temporal_Keyword: Holocene, Modern
Access_Constraints: None
Use_Constraints: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA
Browse_Graphic:
Browse_Graphic_File_Name:
<http://www.ngdc.noaa.gov/paleo/outreach/coral/image/malindix-raylarge.gif>
Browse_Graphic_File_Description: Density banding
Browse_Graphic_File_Type: GIF
Browse_Graphic:
Browse_Graphic_File_Name:
<http://www.ngdc.noaa.gov/paleo/outreach/coral/image/kenyauv-crossdatinglarge.gif>
Browse_Graphic_File_Description: Fluorecent banding
Browse_Graphic_File_Type: GIF
Data_Set_Credit:
Cole, J. E., R. B. Dunbar, T. R. McClanahan, and N. Muthiga, 2000, Tropical Pacific forcing of decadal variability in the western Indian Ocean over the past two centuries, Science 287, 617-619.
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: coral variable
Entity_Type_Definition: coral variable
Entity_Type_Definition_Source: coral variable
Attribute:
Attribute_Label: del18O
Attribute_Definition: delta 18O (per mil)
Attribute_Definition_Source:
Craig, H., 1957. Isotopic standards for mass spectrometric analysis of carbon dioxide. Geochimica Cosmochimica Acta, 12:113-140
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: unknown
Range_Domain_Maximum: unknown
Attribute_Units_of_Measure: per mil
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: SST
Attribute_Definition: Sea Surface Temperature
Attribute_Definition_Source: unknown
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: unknown
Range_Domain_Maximum: unknown
Attribute_Units_of_Measure: degree C
Attribute_Measurement_Resolution: 0.1
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Paleoclimatology Program
Contact_Position: Data Manager
Contact_Address:
Address_Type: Mailing Address
Address: 325 Broadway, Code E/CC23
City: Boulder
State_or_Province: Colorado
Postal_Code: 80305-3328
Country: U.S.A.
Contact_Voice_Telephone: (303) 497-6280
Contact_TDD/TTY_Telephone: (303) 497-6958
Contact_Facsimile_Telephone: (303) 497-6513
Contact_Electronic_Mail_Address: paleo@noaa.gov
Hours_of_Service: 9-5 MST Monday-Friday
Resource_Description: Other Documents
Distribution_Liability:
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<ftp://ftp.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/malindi_2000.txt>
Access_Instructions:
Data can be obtained from <http://www.ngdc.noaa.gov/paleo> and via anonymous ftp to ftp.ngdc.noaa.gov. Diskette and paper copies may be obtained by mail.
Offline_Option:
Offline_Media: Diskette
Recording_Format: cpio
Fees:
On-line data are available free of charge, other forms are available for the cost of reproduction
Ordering_Instructions: Contact the Data Center to order paper copies of data
Turnaround: 4 days
Metadata_Reference_Information:
Metadata_Date: 20110331
Metadata_Review_Date: 20110331
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Paleoclimatology Program
Contact_Position: Data Manager
Contact_Address:
Address_Type: Mailing Address
Address: 325 Broadway, Code E/CC23
City: Boulder
State_or_Province: Colorado
Postal_Code: 80305-3328
Country: U.S.A.
Contact_Voice_Telephone: (303) 497-6280
Contact_TDD/TTY_Telephone: (303) 497-6958
Contact_Facsimile_Telephone: (303) 497-6513
Contact_Electronic_Mail_Address: paleo@noaa.gov
Hours_of_Service: 9-5 MST Monday-Friday
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints: No Constraints
Metadata_Use_Constraints: No Constraints
CoRIS:
CoRIS_ID: 20020325082855
CoRIS_Children: None
CoRIS_Beginning_Date: 18010101
CoRIS_Ending_Date: 19941231
CoRIS_Metadata_Link:
<http://www.coris.noaa.gov/metadata/records/html/paleoclimatology_malindi_2000.html>
CoRIS_Tracking_ID: 56
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