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

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Entry ID

NSIDC-0098

Summary

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.

Geographic Coverage

 

Spatial Coordinates:
N: -81.667°     S: -81.667°     E: -148.767°     W: -148.767°    
N: -89.997°     S: -89.997°     E: -102°     W: -102°    

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Sample Location Map


Data Set Citation

Dataset Creator: J.P. Severinghaus, A. Grachev, and M. Battle
Dataset Title: Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole
Dataset Release Date: 2001-01-01
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0098.html
Dataset DOI: http://dx.doi.org/10.7265/N51N7Z2P

Data Resolution

Vertical Resolution: 1 m to 9 m

Location Keywords

  • CONTINENT ANTARCTICA SIPLE DOME

Science Keywords

  • Cryosphere Glaciers/Ice Sheets Ice Sheets Firn Air Isotopes
  • Cryosphere Snow/Ice Snow/Ice Temperature Firn Temperature
  • Paleoclimate Ice Core Records Ice Core Air Bubbles Firn Air
  • Paleoclimate Ice Core Records Isotopes Firn Air Isotopes
  • Terrestrial Hydrosphere Glaciers/Ice Sheets Ice Sheets Firn Air Isotopes
  • Terrestrial Hydrosphere Snow/Ice Snow/Ice Temperature Firn Temperature

Ancillary Keywords

  • Antarctica
  • Argon Isotopes
  • Atmospheric Gases
  • Boreholes
  • Firn Air Isotope Measurements
  • Firn Air Isotopes
  • Firn Isotopes
  • Firn Temperature Measurements
  • Gas Isotopes
  • Ice Core Gas Records
  • Isotopic Anomalies
  • Isotopic History
  • Krypton
  • mass spectrometers
  • Mass Spectrometry
  • Nitrogen Isotopes
  • NSIDC
  • NSIDC-0098
  • Oxygen Isotopes
  • Polar Firn Air
  • Seasonal Temperature Changes
  • Seasonal Temperature Gradients
  • Shallow Firn Air
  • Siple Dome
  • South Pole
  • Thermal Diffusion
  • Thermal Fractionation
  • Trapped Air Bubbles
  • Xenon

Platform

  • GROUND-BASED OBSERVATIONS
  • GROUND STATIONS

Instrument

  • FLASKS
  • MASS SPECTROMETERS
  • THERMISTORS

Data Set Progress

complete

Originating Center

AGDC

Data Center

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Antarctic Glaciological Data Center
Data Center URL: http://nsidc.org/agdc/

Data Center Personnel

Name: AGDC User Services
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: FTP
Distribution Size: 1 - 5 KB
Distribution Format: Microsoft Excel

Distribution Media: FTP
Distribution Size: 1 - 5 KB
Distribution Format: ASCII Text (.txt)

Personnel

Jeffrey P. Severinghaus
Role: INVESTIGATOR
Phone: 1 858 822.2483
Fax: 1 858 822.3310
Email: jseveringhaus@ucsd.edu
Contact Address:

  • Scripps Institution of Oceanography
  • 9500 Gilman Dr.

City: La Jolla
Province or State: CA
Postal Code: 92037-0244
Country: USA

A. Grachev
Role: INVESTIGATOR
Contact Address:

  • Scripps Institution of Oceanography,
  • University of California at San Diego

Mark Battle
Role: INVESTIGATOR
Contact Address:

  • Bowdoin College,
  • Brunswick, Maine

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

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.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2001-01-01
Last DIF Revision Date: 2014-03-13

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