Newall Glacier and Dome C Ice Core in situ 14C Data

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Jull, A.J.T., D. Lal, D.J. Donahue, P. Mayewski, C. Lorius, D. Raynaud and J.R. Petit
Publication_Date: September 2003
Title: Newall Glacier and Dome C Ice Core in situ 14C Data
Edition:
Geospatial_Data_Presentation_Form:
Series_Information:
Series_Name: IGBP PAGES/WDC CONTRIBUTION SERIES NUMBER: 2003-065
Issue_Identification: 2003-065
Publication_Information:
Publication_Place: Boulder, CO
Publisher: IGBP PAGES/World Data Center for Paleoclimatology
Other_Citation_Details:
NOAA/NCDC Paleoclimatology Program
Online_Linkage: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/newall/newall_domec_14c.txt
Description:
Abstract:
We have studied the levels of 14C in firn and ice from two regions accumulating ice in Antarctica, Dome C, and Newall Glacier. The observed concentrations indicate variable amounts of in-situ 14C from cosmic-ray spallation of oxygen. 14C appears to be produced as both CO and CO2 in variable amounts, but our results suggest rapid conversion of 14CO to 14CO2. Much of the in-situ 14C is retained which results in a significant modification of the 14C/12C in ice derived from trapping of air at and below the firn-ice transition zone. This means that direct dating of accumulating ice cannot be used without correction for the in-situ 14C. In Newall ice, we see some evidence for an enhancement in in-situ 14C at or near the time of the Maunder Minimum. Results for Dome C firn and ice indicate higher levels of in-situ 14C in older ice. This is due either to a reduced accumulation rate in the past, or possible variations in cosmogenic 14C production. The levels of in-situ 14C in firn and ice, and its impact on 14C dates on trapped CO2 in ice are discussed.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Jull, A.J.T., D. Lal, D.J. Donahue, P. Mayewski, C. Lorius, D. Raynaud and J.R. Petit, 1994, Measurements of cosmic-ray-produced 14C in firn and ice from antarctica, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 92, Issues 1-4, 3 June 1994, Pages 326-330. doi:10.1016/0168-583X(94)96028-3
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 123.35
East_Bounding_Coordinate: 123.35
North_Bounding_Coordinate: -75.0
South_Bounding_Coordinate: -75.0
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 162.62
East_Bounding_Coordinate: 162.62
North_Bounding_Coordinate: -77.5
South_Bounding_Coordinate: -77.5
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: PROJECT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > CARBON DIOXIDE
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > ISOTOPES
Theme_Keyword: PAGES > PAST GLOBAL CHANGES, IGBP
Theme_Keyword: 14c
Theme_Keyword: Newall Glacier
Theme_Keyword: Dome C
Theme_Keyword: Cosmogenic 14c
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: Not Available
Use_Constraints:
Not Available
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: A. J.T. JULL
Contact_Person_Primary:
Contact_Person: DEVENDRA LAL
Contact_Person_Primary:
Contact_Person: D. J. DONAHUE
Contact_Person_Primary:
Contact_Person: PAUL A. MAYEWSKI
Contact_Person_Primary:
Contact_Person: CLAUDE LORIUS
Contact_Person_Primary:
Contact_Person: DOMINIQUE RAYNAUD
Contact_Person_Primary:
Contact_Person: J. R. PETIT
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Scripps Institution of Oceanography
Address: University of California, San Diego
City: La Jolla
State_or_Province: CA
Postal_Code: 92093
Country: US
Contact_Address:
Address_Type: Mailing and Physical Address
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Climate Change Institute
Address: Department of Earth Sciences
Address: University of Maine
Address: 303 Bryand Global Science Building
City: Orono
State_or_Province: ME
Postal_Code: 04469-5790
Country: United States
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Laboratoire de Glaciologie et de
Address: Geophysique de l'Environnement
Address: CNRS-CEA 91198
Address: Gif-su-Yvette Cedex
Country: France
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Laboratoire de Glaciologie et
Address: Geophysique de l''Environnement
Address: 54 Rue Molieres
City: St. Martin d'Heres Cedex
Postal_Code: 38402
Country: FRANCE
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Laboratoire de Glaciologie et de
Address: Geophysique de l'Environnement
Address: Gif-su-Yvette Cedex
Address: CNRS-CEA
Postal_Code: 91198
Country: FRANCE
Contact_Voice_Telephone: 207-581-2190
Contact_Voice_Telephone: 207-581-3019
Contact_Voice_Telephone: 76-42-58-72
Contact_Facsimile_Telephone: 207-581-1203
Contact_Electronic_Mail_Address: dlal@ucsd.edu
Contact_Electronic_Mail_Address: paul.mayewski@maine.edu
Contact_Electronic_Mail_Address: climatechange@maine.edu
Contact_Electronic_Mail_Address: usitase@maine.edu
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: WDC/PALEOCLIMATOLOGY, BOULDER > World Data Center for Paleoclimatology, Boulder
Contact_Person: WDC/PALEOCLIMATOLOGY, BOULDER
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: World Data Center for Paleoclimatology
Address: NOAA/NCDC Code E/GCx3
Address: 325 Broadway
City: Boulder
State_or_Province: CO
Postal_Code: 80303
Country: USA
Contact_Voice_Telephone: +1 (303) 497-6160
Contact_Facsimile_Telephone: +1 (303) 497-6513
Contact_Electronic_Mail_Address: paleo@noaa.gov
Resource_Description: NOAA_NCDC_PALEO_2003-065
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: text
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ncdc.noaa.gov/paleo/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/ant...
Access_Instructions:
Access to 14C data and documentation from Newall Glacier and Dome C
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.ncdc.noaa.gov/paleo/icecore/antarctica/...
Access_Instructions:
Access to EPICA Dome C data sets
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20041110
Metadata_Review_Date: 20041110
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: GCMD User Support Office
Contact_Organization: NASA Global Change Master Directory
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Not Available
City: Lanham
State_or_Province: MD
Postal_Code: 20706
Country: USA
Contact_Voice_Telephone: Not Available
Contact_Electronic_Mail_Address: gcmduso@gcmd.gsfc.nasa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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