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Comparison of Independent Δ14CO2 Records at Point Barrow, Alaska

Published online by Cambridge University Press:  09 February 2016

H D Graven ,
X Xu ,
T P Guilderson ,
R F Keeling ,
S E Trumbore  and
S Tyler
H D Graven*
Affiliation:
Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0244, USA
X Xu
Affiliation:
Department of Earth System Science, University of California, Irvine, Irvine, California 92697-3100, USA
T P Guilderson
Affiliation:
Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory L-397, 7000 East Ave., Livermore, California 94550, USA Department of Ocean Sciences, University of California, Santa Cruz, Santa Cruz, California 95064, USA
R F Keeling
Affiliation:
Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0244, USA
S E Trumbore
Affiliation:
Max Planck Institute of Biogeochemistry, Postfach 10 01 64, 07701 Jena, Germany
S Tyler
Affiliation:
Department of Earth System Science, University of California, Irvine, Irvine, California 92697-3100, USA
*
2Corresponding author. Email: hgraven@ucsd.edu.
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Abstract

Two independent programs have collected and analyzed atmospheric CO2 samples from Point Barrow, Alaska, for radiocarbon content (Δ14C) over the period 2003–2007. In one program, flask collection, stable isotope analysis, and CO2 extraction are performed by the Scripps Institution of Oceanography's CO2 Program and CO2 is graphitized and measured by accelerator mass spectrometry (AMS) at Lawrence Livermore National Laboratory. In the other program, the University of California, Irvine, performs flask collection, sample preparation, and AMS. Over 22 common sample dates spanning 5 yr, differences in measured Δ14C are consistent with the reported uncertainties and there is no significant bias between the programs.

Type
Atmospheric Carbon Cycle
Information
Radiocarbon , Volume 55 , Issue 3: Proceedings of the 21st International Radiocarbon Conference (Part 2 of 2) , 2013 , pp. 1541 - 1545
Copyright
Copyright © 2013 by the Arizona Board of Regents on behalf of the University of Arizona 

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