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Title: Delta14 CO2 Atmospheric Record from Schauinsland, Germany

Abstract

All air samples at Schauinsland have been collected from a ventilated intake stack approximately 7m above the ground. Bi-weekly integrated CO2 samples from about 15-20 m3 of air have been continuously collected by dynamic quantitative absorption in carbonate-free sodium hydroxide (NaOH) solution. Air has been pumped through a rotating glass tube filled with a packed bed of Raschig rings (hard glass) to enlarge the surface of the absorbing NaOH solution (200 ml of 4 normal NaOH). The CO2 absorption is quantitative and samples represent mean values of 10 days to 2 weeks. In the laboratory, the samples are extracted from the NaOH solution in a vacuum system by adding hydrochloric or sulfuric acid. 13C analyses of the CO2 are by mass spectrometry and 14C analyses are by high precision proportional counting, after purification of the CO2 sample over charcoal (Schoch et al. 1980, Kromer and Münnich 1992). δ13C values are given relative to the V-PDB standard (Hut 1987) with the overall precision of a single analysis reported to be +/- 0.15 per mil (Levin and Kromer 1997). δ14C data are given relative to the NIST oxalic acid activity corrected for decay (Stuiver and Polach 1977) with the precision of amore » single δ14C measurement reported to be +/- 3-5 per mil (Levin and Kromer 1997).« less

Authors:
;
  1. Institut fur Umweltphysik, University of Heidelberg, Heidelberg, Germany
Publication Date:
Product Type:
Dataset
Research Org.:
Environmental System Science Data Infrastructure for a Virtual Ecosystem (ESS-DIVE) (United States); Carbon Dioxide Information Analysis (CDIAC), Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Subject:
54 ENVIRONMENTAL SCIENCES
OSTI Identifier:
1394324
DOI:
https://doi.org/10.3334/CDIAC/ATG.027

Citation Formats

Levin, Ingeborg, and Kromer, Bernd. Delta14 CO2 Atmospheric Record from Schauinsland, Germany. United States: N. p., 1997. Web. doi:10.3334/CDIAC/ATG.027.
Levin, Ingeborg, & Kromer, Bernd. Delta14 CO2 Atmospheric Record from Schauinsland, Germany. United States. doi:https://doi.org/10.3334/CDIAC/ATG.027
Levin, Ingeborg, and Kromer, Bernd. 1997. "Delta14 CO2 Atmospheric Record from Schauinsland, Germany". United States. doi:https://doi.org/10.3334/CDIAC/ATG.027. https://www.osti.gov/servlets/purl/1394324. Pub date:Wed Jan 01 00:00:00 EST 1997
@article{osti_1394324,
title = {Delta14 CO2 Atmospheric Record from Schauinsland, Germany},
author = {Levin, Ingeborg and Kromer, Bernd},
abstractNote = {All air samples at Schauinsland have been collected from a ventilated intake stack approximately 7m above the ground. Bi-weekly integrated CO2 samples from about 15-20 m3 of air have been continuously collected by dynamic quantitative absorption in carbonate-free sodium hydroxide (NaOH) solution. Air has been pumped through a rotating glass tube filled with a packed bed of Raschig rings (hard glass) to enlarge the surface of the absorbing NaOH solution (200 ml of 4 normal NaOH). The CO2 absorption is quantitative and samples represent mean values of 10 days to 2 weeks. In the laboratory, the samples are extracted from the NaOH solution in a vacuum system by adding hydrochloric or sulfuric acid. 13C analyses of the CO2 are by mass spectrometry and 14C analyses are by high precision proportional counting, after purification of the CO2 sample over charcoal (Schoch et al. 1980, Kromer and Münnich 1992). δ13C values are given relative to the V-PDB standard (Hut 1987) with the overall precision of a single analysis reported to be +/- 0.15 per mil (Levin and Kromer 1997). δ14C data are given relative to the NIST oxalic acid activity corrected for decay (Stuiver and Polach 1977) with the precision of a single δ14C measurement reported to be +/- 3-5 per mil (Levin and Kromer 1997).},
doi = {10.3334/CDIAC/ATG.027},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}

Works referencing / citing this record:

Variable effects of nitrogen additions on the stability and turnover of soil carbon
journal, October 2002