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Concentration of Radiocarbon in Soil-Respired CO2 Flux: Data-Model Comparison for Three Different Ecosystems in Southern Poland

Published online by Cambridge University Press:  09 February 2016

Z Gorczyca ,
T Kuc  and
K Rozanski
Z Gorczyca
Affiliation:
AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
T Kuc*
Affiliation:
AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
K Rozanski
Affiliation:
AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, 30-059 Krakow, Poland
*
1Corresponding author. Email: kuc@agh.edu.pl.
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Abstract

We report and compare the results of long-term observations (1998–2006) of monthly mean soil CO2 fluxes and their carbon isotope composition, carried out at 3 sites with contrasting characteristics: 1) a grassland site located in the urban area of Krakow, southern Poland, which was exposed to anthropogenic impact for more than a century; 2) a mixed forest site; and 3) cultivated agricultural field site. A closed-chamber, dynamic sampling system was used to collect monthly cumulative samples of soil-respired CO2. The CO2 collected at the mixed forest site was enriched in 14C with respect to European free-atmosphere continental 14CO2 background (high-altitude station Jungfraujoch in Swiss Alps) by approximately 40%, while the urban site revealed 14C depletion by ∼30% against the same reference. The Δ14C values observed at the agricultural site were lying in between, clustering along the regional reference atmospheric Δ14CO2 trend curve. The Δ14C values of soil-respired CO2 at the urban site turned out to be indistinguishable from the Δ14CO2 values in the local atmosphere. For the estimation of mean turnover time of soil carbon for each of the monitored sites, we used a multicompartment model (MCM) accounting for input of carbon to the soil profile via deposition of fresh organic matter, as well as 3 different sources of CO2 in the soil profile: 1) root respiration; 2) “fast”; and 3) “slow” pools of soil carbon. The estimated mean turnover time of carbon in the “fast” carbon pool was ∼14 yr for both urban grassland and mixed forest sites, and ∼22 yr for the cultivated agricultural field. From the observed differences in Δ14C values of the measured fluxes of soil-respired CO2, we conclude that 14C content of the biogenic component in the local atmospheric CO2 is site-specific and may differ significantly from the regional atmospheric background Δ14CO2 value. Therefore, the assumption widely used in 14C-based assessments of the fossil-fuel contribution local atmospheric CO2 load, stating that 14C concentration in the biogenic CO2 component is equal to that of regional atmospheric reference value, needs to be carefully evaluated on a case-by-case basis.

Type
Atmospheric Carbon Cycle
Information
Radiocarbon , Volume 55 , Issue 3: Proceedings of the 21st International Radiocarbon Conference (Part 2 of 2) , 2013 , pp. 1521 - 1532
Copyright
Copyright © 2013 by the Arizona Board of Regents on behalf of the University of Arizona 

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References

Battle, M, Bender, ML, Tans, PP, White, JW, Ellis, JT, Conway, T, Francey, RJ. 2000. Global carbon sinks and their variability inferred from atmospheric O2 and δ13C. Science 287(5462):2467–70.Google Scholar
Balesdent, J, Mariotti, A, Guillet, B. 1987. Natural 13C abundance as a tracer for studies of soil organic matter dynamics. Soil Biology & Biochemistry 19(1):25–30.CrossRefGoogle Scholar
Balesdent, J, Wagner, GH, Mariotti, A. 1988. Soil organic matter turnover in long-term field experiments as revealed by carbon-13 natural abundance. Soil Science Society of America Journal 52(1):118–24.Google Scholar
Camarda, M, De Gregorio, S, Favara, R, Gurrieri, S. 2007. Evaluation of carbon isotope fractionation of soil CO2 under an advective-diffusive regime: a tool for computing the isotopic composition of unfractionated deep source. Geochimica et Cosmochimica Acta 71(12):3016–27.Google Scholar
Cerling, TE, Solomon, DK, Quade, J, Bowman, JR. 1991. On the isotopic composition of carbon in soil carbon dioxide. Geochimica et Cosmochimica Acta 55(11):3403–5.Google Scholar
Chichagova, OA, Cherkinsky, AE. 1993. Problems in radiocarbon dating of soils. Radiocarbon 35(3):351–62.Google Scholar
Dörr, H, Münnich, KO. 1980. Carbon-14 and carbon-13 in soil CO2 . Radiocarbon 22(3):909–18.Google Scholar
Dörr, H, Münnich, KO. 1987. Annual variation in soil respiration in selected areas of the temperate zone. Tellus B 39(3–4):114–21.Google Scholar
Dudziak, A, Hałas, S. 1996. Influence of freezing and thawing on the carbon isotope composition in soil CO2 . Geoderma 69:209–16.Google Scholar
Ekblad, A, Högberg, P. 2000. Analysis of δ13C of CO2 distinguishes between microbial respiration of added C4-sucrose and other soil respiration in a C3-ecosystem. Plant and Soil 219:197–209.CrossRefGoogle Scholar
Florkowski, T, Grabczak, J, Kuc, T, Rozanski, K. 1975. Determination of radiocarbon in water by gas or liquid scintillation counting. Nukleonika 20:1053–66.Google Scholar
Goh, KM, Molloy, BPJ. 1978. Radiocarbon dating of paleosols using organic matter components. The Journal of Soil Science 29(4):567–73.Google Scholar
Gorczyca, Z, Różański, K, Kuc, T, Michalec, B. 2003. Seasonal variability of the soil CO2 flux and its isotopic composition in southern Poland. Nukleonika 48(4):187–96.Google Scholar
Harrison, KG. 1996. Using bulk soil radiocarbon measurements to estimate soil organic matter turnover times: implications for atmospheric CO2 levels. Radiocarbon 38(2):181–90.Google Scholar
Hesterberg, R, Siegenthaler, U. 1991. Production and stable isotopic composition of CO2 in a soil near Bern, Switzerland. Tellus B 43(2):197–205.Google Scholar
Houghton, RA. 2003. Why are estimates of the terrestrial carbon balance so different? Global Change Biology 9(4):911–8.Google Scholar
IUSS Working Group WRB. 2007. World Reference Base for Soil Resources 2006. First update 2007. World Soil Resources Reports 103. Rome: Food and Agriculture Organization. 118 p.Google Scholar
Jensen, LS, Mueller, T, Tate, KR, Ross, DJ, Magid, J, Nielsen, NE. 1996. Soil surface CO2 flux as an index of soil respiration in situ: a comparison of two chamber methods. Soil Biology & Biochemistry 28(10–11):1297–306.Google Scholar
Koarashi, J, Amano, H, Andoh, M, Iida, T, Moriizumi, J. 2002. Estimation of 14CO2 flux at soil–atmosphere interface and distribution of 14C in forest ecosystem. Journal of Environmental Radioactivity 60(3):249–61.Google Scholar
Kuc, T. 2005. A multi-layer box model of carbon dynamics in soil. Nukleonika 50(2):49–55.Google Scholar
Kuc, T, Zimnoch, M. 1998. Changes of the CO2 sources and sinks in a polluted urban area (southern Poland) over the last decade, derived from the carbon isotope composition. Radiocarbon 40(1):417–23.Google Scholar
Kuc, T, Rozanski, K, Zimnoch, M, Necki, J, Chmura, L, Jelen, D. 2007. Two decades of regular observations of 14CO2 and 13CO2 content in atmospheric carbon dioxide in central Europe: long-term changes of regional anthropogenic fossil CO2 emissions. Radiocarbon 49(2):807–16.Google Scholar
Levin, I, Kromer, B, Schmidt, M, Sartorius, H. 2003. A novel approach for independent budgeting of fossil fuel CO2 over Europe by 14CO2 observations. Geophysical Research Letters 30(23):2194, doi:10.1029/2003GL018477.Google Scholar
Levin, I, Hammer, S, Kromer, B, Meinhardt, F. 2008. Radiocarbon observations in atmospheric CO2: determining fossil fuel CO2 over Europe using Jungfraujoch observations as background. Science of the Total Environment 391(2–3):211–6.Google Scholar
Levin, I, Naegler, T, Kromer, E, Diehl, M, Francey, RJ, Gomez-Pelaez, AJ, Schäfer, A, Steele, LP, Wagenbach, D, Weller, R, Worthy, DE. 2010. Observations and modelling of the global distribution and long-term trend of atmospheric 14CO2 . Tellus B 62(1):26–46.Google Scholar
Liu, W, Moriizumi, J, Yamazawa, H, Iida, T. 2006. Depth profiles of radiocarbon and carbon isotopic compositions of organic matter and CO2 in a forest soil. Journal of Environmental Radioactivity 90(3):210–23.Google Scholar
Naganawa, T, Kyuma, K. 1991. Concentration dependence of CO2 evolution from soil in chamber with low CO2 concentration (<2,000 ppm), and CO2 diffusion/sorption model in soil. Soil Science and Plant Nutrition 37(3):387–97.Google Scholar
Nissenbaum, A, Schallinger, KM. 1974. The distribution of the stable carbon isotope (13C/12C) in fractions of soil organic matter. Geoderma 11(2):137–45.Google Scholar
O'Brien, BJ. 1986. The use of natural and anthropogenic 14C to investigate the dynamics of soil organic carbon. Radiocarbon 28(2A):358–62.Google Scholar
O'Brien, BJ, Stout, JD. 1978. Movement and turnover of soil organic matter as indicated by carbon isotope measurements. Soil Biology & Biochemistry 10(4):309–17.Google Scholar
Pan, Y, Birdsey, AB, Fang, J, Houghton, R, Kauppi, PE, Kurz, WA, Phillips, OL, Shvidenko, A, Canadell, JG, Ciais, P, Jackson, RB, Pacala, SW, McGuire, AD, Piao, S, Rautiainen, A, Sitch, S, Hayes, D. 2011. A large and persistent carbon sink in the world's forests. Science 333(6045):988–93.Google Scholar
Pessenda, LCR, Valencia, EPC, Camargo, PB, Telles, ECC, Martinelli, LA, Aravena, R, Rozanski, K. 1996. Natural radiocarbon measurements in Brazilian soils developed on basic rocks. Radiocarbon 38(2):203–8.CrossRefGoogle Scholar
Rutberg, RL, Schimel, DS, Hajdas, I, Broecker, WS. 1996. The effect of tillage on soil organic matter using 14C: a case study. Radiocarbon 38(2):209–17.Google Scholar
Schlesinger, WH, Andrews, JA. 2000. Soil respiration and the global carbon cycle. Biogeochemistry 48:7–20.Google Scholar
Schüssler, W, Neubert, R, Levin, I, Fischer, N, Sonntag, C. 2000. Determination of microbial versus root-produced CO2 in an agricultural ecosystem by means of δ13CO2 measurements in soil air. Tellus B 52:909–18.Google Scholar
Stuiver, M, Polach, HA. 1977. Discussion: reporting of 14C data. Radiocarbon 19(3):355–63.Google Scholar
Turnbull, JC, Miller, JB, Lehman, SJ, Tans, PP, Sparks, RJ, Southon, J. 2008. Comparison of 14CO2, CO, and SF6 as tracers for recently added fossil fuel CO2 in the atmosphere and implications for biological CO2 exchange. Geophysical Research Letters 33: L01817, doi:10.1029/2005GL024213.Google Scholar
Wang, Y, Amundson, R, Trumbore, S. 1994. A model for soil 14CO2 and its implications for using 14C to date pedogenic carbonate. Geochimica et Cosmochimica Acta 58(1)393–9.Google Scholar