Science Keywords>PALEOCLIMATE>ICE CORE RECORDS>ISOTOPES

Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole

Federal Geographic Data Committee (FGDC) Metadata:
Identification_Information:
Citation:
Citation_Information:
Originator: J.P. Severinghaus, A. Grachev, and M. Battle
Publication_Date: 20010101
Title: Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole
Edition:
Geospatial_Data_Presentation_Form: Table
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place: Boulder, CO U.S.A.
Publisher: National Snow and Ice Data Center (NSIDC)
Other_Citation_Details:
Online_Linkage: http://nsidc.org/data/nsidc-0098.html
Description:
Abstract:
This data set includes d15N, d18O/2, dO2/N2/4, d40Ar/4, d38/Ar/2, d84Kr/48, and d132Xe/96 values for air drawn from the top 15 to 50 m of firn at the South Pole (summer and winter 1998) and a site at Siple Dome (summers 1996 and 1998). Data also include related firn temperature measurements. The objective of this research was to better understand thermal fractionation processes affecting records of atmospheric history from firn and ice core gases. Recent work (e.g., Severinghaus and Brook, 1999) has exploited trapped air in ice and deep firn as a record of past atmospheric composition and climate change. Interpretation of these paleoclimate archives is complicated by artifacts of thermal diffusion, a process in which heavier gases migrate down temperature gradients toward colder regions in the firn. Seasonal temperature change at the snow surface creates strong temperature gradients in the top few meters of the firn, which cause isotopic fractionation of firn gases. A specific goal of this research is to identify any long-term effects of seasonal temperature fluctuations on firn air isotopic anomalies.
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Severinghaus, J.P., A. Grachev, and M. Battle. 2001. Thermal fractionation of air in polar firn by seasonal temperature gradients. Geochemistry, Geophysics, Geosystems [online journal] 2: Paper no. 2000GC000146. Severinghaus, J.P. and E.J. Brook, 1999. Abrupt climate change at the end of the last glacial period inferred from trapped air in polar ice. Science 286: 930-934.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -102.0
East_Bounding_Coordinate: -102.0
North_Bounding_Coordinate: -89.997
South_Bounding_Coordinate: -89.997
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -148.767
East_Bounding_Coordinate: -148.767
North_Bounding_Coordinate: -81.667
South_Bounding_Coordinate: -81.667
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS > FIRN AIR ISOTOPES
Theme_Keyword: EARTH SCIENCE > CRYOSPHERE > SNOW/ICE > SNOW/ICE TEMPERATURE > FIRN TEMPERATURE
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS > FIRN AIR ISOTOPES
Theme_Keyword: EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SNOW/ICE > SNOW/ICE TEMPERATURE > FIRN TEMPERATURE
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > ICE CORE AIR BUBBLES > FIRN AIR
Theme_Keyword: EARTH SCIENCE > PALEOCLIMATE > ICE CORE RECORDS > ISOTOPES > FIRN AIR ISOTOPES
Theme_Keyword: GROUND STATIONS
Theme_Keyword: GROUND-BASED OBSERVATIONS
Theme_Keyword: FLASKS
Theme_Keyword: THERMISTORS
Theme_Keyword: MASS SPECTROMETERS
Theme_Keyword: Antarctica
Theme_Keyword: Argon Isotopes
Theme_Keyword: Atmospheric Gases
Theme_Keyword: Boreholes
Theme_Keyword: Firn Air Isotope Measurements
Theme_Keyword: Firn Air Isotopes
Theme_Keyword: Firn Isotopes
Theme_Keyword: Firn Temperature Measurements
Theme_Keyword: Gas Isotopes
Theme_Keyword: Ice Core Gas Records
Theme_Keyword: Isotopic Anomalies
Theme_Keyword: Isotopic History
Theme_Keyword: Krypton
Theme_Keyword: Mass Spectrometers
Theme_Keyword: Mass Spectrometry
Theme_Keyword: Nitrogen Isotopes
Theme_Keyword: Nsidc
Theme_Keyword: Nsidc-0098
Theme_Keyword: Oxygen Isotopes
Theme_Keyword: Polar Firn Air
Theme_Keyword: Seasonal Temperature Changes
Theme_Keyword: Seasonal Temperature Gradients
Theme_Keyword: Shallow Firn Air
Theme_Keyword: Siple Dome
Theme_Keyword: South Pole
Theme_Keyword: Thermal Diffusion
Theme_Keyword: Thermal Fractionation
Theme_Keyword: Trapped Air Bubbles
Theme_Keyword: Xenon
Theme_Keyword: CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: INLAND WATERS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA > SIPLE DOME
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: Not Available
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Point_of_Contact:
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Contact_Person: NSIDC USER SERVICES
Contact_Position: TECHNICAL CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: National Snow and Ice Data Center
Address: CIRES, 449 UCB
Address: University of Colorado
City: Boulder
State_or_Province: CO
Postal_Code: 80309-0449
Country: USA
Contact_Voice_Telephone: +1 (303) 492-6199
Contact_Facsimile_Telephone: +1 (303) 492-2468
Contact_Electronic_Mail_Address: nsidc@nsidc.org
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Not Available
Logical_Consistency_Report:
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Completeness_Report:
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Lineage:
Process_Step:
Process_Description:
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Process_Date: Unknown
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Spatial_Reference_Information:
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: Not Available
Altitude_Resolution: 1 to 9 m
Altitude_Distance_Units: Not Available
Altitude_Encoding_Method: Implicit coordinate
Depth_System_Definition:
Depth_Datum_Name: Not Available
Depth_Resolution: 1 to 9 m
Depth_Distance_Units: Not Available
Depth_Encoding_Method: Implicit coordinate
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NSIDC > National Snow and Ice Data Center
Contact_Person: NSIDC USER SERVICES
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: National Snow and Ice Data Center
Address: CIRES, 449 UCB
Address: University of Colorado
City: Boulder
State_or_Province: CO
Postal_Code: 80309-0449
Country: USA
Contact_Voice_Telephone: +1 (303) 492-6199
Contact_Facsimile_Telephone: +1 (303) 492-2468
Contact_Electronic_Mail_Address: nsidc@nsidc.org
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NSIDC_AGDC > NSIDC Antarctic Glaciological Data Center
Contact_Person: NSIDC AGDC USER SERVICES
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: National Snow and Ice Data Center
Address: CIRES, 449 UCB
Address: University of Colorado
City: Boulder
State_or_Province: CO
Postal_Code: 80309-0449
Country: USA
Contact_Voice_Telephone: +1 (303) 492-6199
Contact_Facsimile_Telephone: +1 (303) 492-2468
Contact_Electronic_Mail_Address: nsidc@nsidc.org
Resource_Description: NSIDC-0098
Resource_Description: NSIDC-0098
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: MS Excel or ASCII text files
Transfer_Size: 1 to 5 KB per file
Digital_Transfer_Option:
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http://nsidc.org
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DATA CENTER URL
Online_Option:
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Network_Address:
Network_Resource_Name:
http://nsidc.org/agdc/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Fees: None
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Metadata_Reference_Information:
Metadata_Date: 20010919
Metadata_Review_Date: 20110719
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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