Multiple-isotope Analysis of Nitrate and Sulfate in the West Antarctic Ice Sheet Divide Ice Core
Entry ID: thiemens_0538520

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Summary
Abstract: The goal of this project is to use the isotopic composition of sulfate and nitrate in the WAIS Divide core to help place better constraints on the oxidant composition of the pre-industrial atmosphere. An important premise is that the combined use of multiple isotope ratios, which have different sensitivities, will place stronger constraints on paleoxidants than a single ratio could provide. Our findings confirm this, and provide the new constraints on pre-industrial/modern oxidants at high southern latitudes.

This data set contains ice core measurements of multiple isotopes of sulfate. The ice cores were drilled at the West Antarctic Ice Sheet (WAIS) Divide site between 2005 and 2007. The initial sulfate measurements (analyzed in 2009) average 12 meters from the 70 meter, 2005A core(79 28.1’S 112 5.2’W) and span the preindustrial-industrial transition (late 1700s to 2005. Measurements from the WAIS 2006A 588 meters deep core (analyzed in 2010) are 10-15 meter averages, and span 2300 years.

Related URL
Link: VIEW RELATED INFORMATION
Description: The U.S research community is conducting a deep ice coring project in West Antarctica for studies of climate, ice sheet history and cryobiology. This project is collecting a deep ice core from the West Antarctic Ice Sheet (WAIS) ice flow divide and integrating approximately 20 separate but synergistic projects to analyze the ice and interpret the records


Geographic Coverage
 N: -79.467 S: -79.467  E: -112.085  W: -112.085

Temporal Coverage
Start Date: 2005-12-19
Stop Date: 2007-12-31


Location Keywords
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
CRYOSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS    [Definition]
CRYOSPHERE >SNOW/ICE    [Definition]
PALEOCLIMATE >ICE CORE RECORDS >ISOTOPES    [Definition]
PALEOCLIMATE >ICE CORE RECORDS    [Definition]
CRYOSPHERE >SNOW/ICE >SNOW/ICE CHEMISTRY    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Platform
FIELD SURVEYS    [Information]
LABORATORY    [Information]
FIELD INVESTIGATION    [Information]


Instrument
MASS SPECTROMETERS    [Information]


Keywords
West Antarctic
WAIS
accumulation rates
temperatures
mass independent fractionation
paleoatmosphere
ice core
isotopes
isotope ratios


Data Set Progress
IN WORK


Originating Center
University of California San Diego, Division of Physical Sciences


Data Center
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


Personnel
MARK H. THIEMENS
Role: INVESTIGATOR
Phone: 858 534 6053
Fax: 858 534 7042
Email: mht at chem.ucsd.edu
Contact Address:
University of California, San Diego
Department of Chemistry and Biochemistry
9500 Gilman Dr., MC 0356
City: La Jolla
Province or State: CA
Postal Code: 92093-0356
Country: USA


NSIDC AGDC 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
Sulfate Sources and Oxidation Chemistry Over the Past 230 Years from Sulfur and Oxygen Isotopes of Sulfate in a West Antarctic Ice Core
Kunasek, S.A., B. Alexander, E.J. Steig, E.D., Sofen, T. L. Jackson,
M.H. Thiemens, J.R. McConnell, D.J., Gleason, H.M. Amos,

Creation and Review Dates
DIF Creation Date: 2010-08-24
Last DIF Revision Date: 2010-08-31

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