Search Help
Did you find what you were looking for? Yes No
Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole
Entry ID: NSIDC-0098


Summary
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.
Geographic Coverage
 N: -89.997 S: -89.997  E: -102.0  W: -102.0
 N: -81.667 S: -81.667  E: -148.767  W: -148.767

Data Set Citation
Dataset Originator/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
Dataset DOI: doi:10.7265/N51N7Z2P
Online Resource: http://nsidc.org/data/NSIDC-0098


Location Keywords
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Data Resolution
Vertical Resolution: 1 m to 9 m


Science Keywords
PALEOCLIMATE >ICE CORE RECORDS >ICE CORE AIR BUBBLES >FIRN AIR    [Definition]
PALEOCLIMATE >ICE CORE RECORDS >ISOTOPES >FIRN AIR ISOTOPES    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS >FIRN AIR ISOTOPES    [Definition]
TERRESTRIAL HYDROSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS >FIRN AIR ISOTOPES    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW/ICE TEMPERATURE >FIRN TEMPERATURE    [Definition]
TERRESTRIAL HYDROSPHERE >SNOW/ICE >SNOW/ICE TEMPERATURE >FIRN TEMPERATURE    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
INLAND WATERS


Platform
GROUND STATIONS    [Information]
GROUND-BASED OBSERVATIONS    [Information]


Instrument
FLASKS    [Information]
MASS SPECTROMETERS    [Information]
Thermistors    [Information]


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


Data Set Progress
COMPLETE


Originating Center
NSIDC_AGDC


Data Center
NSIDC U.S. Antarctic Data Coordination Center    [Information]
Data Center URL: http://nsidc.org/usadcc/

Data Center Personnel
Name: NSIDC USADCC USER SERVICES
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at 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


National Snow and Ice Data Center    [Information]
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 at 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


NSIDC Antarctic Glaciological Data Center    [Information]
Data Center URL: http://nsidc.org/agdc/

Data Center Personnel
Name: NSIDC AGDC USER SERVICES
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at 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: 858-822-2483
Fax: 858-822-3310
Email: jseveringhaus at ucsd.edu
Contact Address:
Scripps Institution of Oceanography
9500 Gilman Dr.
City: La Jolla
Province or State: CA
Postal Code: 92093-0244
Country: USA


A. GRACHEV
Role: INVESTIGATOR
Contact Address:
Scripps Institution of Oceanography
University of California at San Diego
City: San Diego
Province or State: CA
Country: USA


MARK BATTLE
Role: INVESTIGATOR
Phone: 207-725-3410
Email: mbattle at bowdoin.edu
Contact Address:
Dept. of Physics and Astronomy
Bowdoin College
8800 College Station
City: Brunswick
Province or State: ME
Postal Code: 04011-8488
Country: USA


NSIDC USER SERVICES
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at 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


Publications/References
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.

Creation and Review Dates
DIF Creation Date: 2001-01-01
Last DIF Revision Date: 2016-01-27



Link to Web Site