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The Influence of Soil Organic Matter Age Spectrum on the Reconstruction of Atmospheric 14C Levels Via Stalagmites

Published online by Cambridge University Press:  18 July 2016

J Fohlmeister ,
B Kromer  and
A Mangini
J Fohlmeister*
Affiliation:
Heidelberg Academy of Sciences, c/o Institute for Environmental Physics, INF 229, 69120 Heidelberg, Germany.
B Kromer
Affiliation:
Heidelberg Academy of Sciences, c/o Institute for Environmental Physics, INF 229, 69120 Heidelberg, Germany.
A Mangini
Affiliation:
Heidelberg Academy of Sciences, c/o Institute for Environmental Physics, INF 229, 69120 Heidelberg, Germany.
*
Corresponding author. Email: jens.fohlmeister@iup.uni-heidelberg.de.
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Abstract

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The imprint of the radiocarbon bomb peak was detected in the top of stalagmite ER-77 from Grotta di Ernesto (NE Italy). This recently grown stalagmite reveals a reservoir age, also known as dead carbon fraction (dcf), of ≃1050 14C yr, or 12%. By applying a 14C soil-karst model, the age spectrum of soil organic matter (SOM) as well as the CO2 contribution of the single SOM reservoirs to the total soil CO2 can be derived. Under the assumption of constant vegetation, meaning both vegetation density and the age spectrum of SOM, it is possible to derive the soil-air 14C activity of the past using the 14C calibration curve (IntCal04). Hence, it is also possible to calculate an artificial stalagmite 14C data set covering the last 25,000 yr with parameters determined for stalagmite ER-77. With this artificially constructed data set, we derived the hypothetical atmospheric 14C activity by using the common method of applying a constant dcf on the modeled 14C data set of the stalagmite. This theoretical approach allows to analyze the impact of a constant and variable SOM age spectrum on atmospheric 14C reconstructions performed with real stalagmite 14C measurements. We observe deviations between IntCal04 and the atmospheric 14C activity as derived with our modeled 14C data set, which are larger for older SOM than for younger SOM and vary in time up to 2 pMC, depending on the strength of the variations in the atmospheric 14C level. This value is comparable with the 1-σ uncertainty given by IntCal04 for the last glacial. For a varying SOM age spectrum, the deviations between the calibration curve and 14C level of the atmosphere reconstructed with a stalagmite exceed 3 pMC, which is larger than the 1-σ uncertainty of IntCal04. In general, the SOM has smoothing, shifting, and 14C-depleting effects on the stalagmite 14C record and, therefore, on the stalagmite-derived atmospheric 14C activity. In this study, changes in soil-air pCO2 and carbonate dissolution conditions, which have also an important impact on the 14C record of a stalagmite, are not accounted for.

Type
Soils and Sediments
Information
Radiocarbon , Volume 53 , Issue 1 , 2011 , pp. 99 - 115
Copyright
Copyright © 2011 The Arizona Board of Regents on behalf of the University of Arizona 

References

REFERENCES

Beck, JW, Richards, DA, Edwards, RL, Silverman, BW, Smart, PL, Donahue, DJ, Hererra-Osterheld, S, Burr, G.S., Calsoyas, L, Jull, AJT, Biddulph, D. 2001. Extremely large variations of atmospheric 14C concentration during the last glacial period. Science 292(5526):2453–8.CrossRefGoogle ScholarPubMed
Borsato, A. 1997. Dripwater monitoring at Grotta di Ernesto (NE Italy): a contribution to the understanding of karst hydrology and the kinetics of carbonate dissolution. In: Proceedings of the 12th International Congress of Speleology. Volume 2. p 57–60.Google Scholar
Borsato, A, Frisia, S, Fairchild, IJ, Somogyi, A, Susini, J. 2007. Trace element distribution in annual stalagmite laminae mapped by micrometer-resolution X-ray fluorescence: implications for incorporation of environmentally significant species. Geochimica et Cosmochimica Acta 71(6):1494–512.Google Scholar
Broecker, WS, Olson, EA, Orr, PC. 1960. Radiocarbon measurements and annual rings in cave formations. Nature 185(4706):93–4.Google Scholar
Dörr, H, Münnich, KO. 1986. Annual variations of the 14C content. Radiocarbon 28(2A):338–45.Google Scholar
Dreybrodt, W. 1988. Processes in Karst Systems - Physics, Chemistry and Geology. Berlin: Springer Verlag. 288 p.Google Scholar
Dulinski, M, Rozanski, K. 1990. Formation of 13C/12C isotope ratios in speleothems: a semi-dynamic model. Radiocarbon 32(1):7–16.Google Scholar
Edwards, RL, Chen, JH, Wasserburg, GJ. 1987. 238U–234U–230Th–232Th systematics and the precise measurement of time over the past 500,000 years. Earth and Planetary Science Letters 81(2–3)175–92.Google Scholar
Fairchild, IJ, Borsato, A, Tooth, AF, Frisia, S, Hawkesworth, CJ, Huang, Y, McDermott, F, Spiro, B. 2000. Controls on trace element (Sr-Mg) compositions of carbonate cave water: implications for speleothem climatic records. Chemical Geology 166(3–4):255–69.Google Scholar
Fohlmeister, J, Schröder-Ritzrau, A, Spötl, C, Frisia, S, Miorandi, R, Kromer, B, Mangini, A. 2010. The influences of hydrology on the radiogenic and stable carbon isotope composition of cave drip water, Grotta di Ernesto (Italy). Radiocarbon 52(4)1529–44.Google Scholar
Franke, HW, Münnich, KO, Vogel, JC. 1959. Erste Ergebnisse von Kohlenstoffisotopenmessungen an Kalksinter. Die Höhle 10:17–22.Google Scholar
Franke, WF. 1951. Altersbestimmung von Kalzitkonkretionen mit radioaktivem Kohlenstoff. Naturwissenschaften 38:527–8.Google Scholar
Frisia, S, Borsato, A, Preto, N, McDermott, F. 2003. Late Holocene annual growth in three alpine stalagmite records the influence of solar activity and the North Atlantic Oscillation on winter climate. Earth and Planetary Science Letters 216(3):411–24.CrossRefGoogle Scholar
Frisia, S, Borsato, A, Fairchild, IJ, Susini, S. 2005. Variations in atmospheric sulphate recorded in stalagmites by synchrotron micro-XRF and XANES analyses. Earth and Planetary Science Letters 235(3–4):729–40.Google Scholar
Frisia, S, Fairchild, IJ, Fohlmeister, J, Miorandi, R, Spötl, C, Borsato, A. 2011. Carbon mass-balance modelling and carbon isotope exchange processes in dynamic caves. Geochimica et Cosmochimica Acta 75(2):380–400.Google Scholar
Garrels, RM, Christ, CL. 1965. Solutions, Minerals and Equilibria. New York: Harper & Row. 450 p.Google Scholar
Genty, D, Massault, M. 1997. Bomb 14C recorded in laminated speleothems: calculations of dead carbon proportion. Radiocarbon 39(1):33–48.CrossRefGoogle Scholar
Genty, D, Massault, M. 1999. Carbon transfer dynamics from bomb-14C and δ13C time series of a laminated stalagmite from SW France—modelling and comparison with other stalagmite records. Geochimica et Cosmochimica Acta 63(10):1537–48.Google Scholar
Genty, D, Vokal, B, Obelic, B, Massault, M. 1998. Bomb 14C time history recorded in two modern stalagmites—importance for soil organic matter dynamics and bomb 14C distribution over continents. Earth and Planetary Science Letters 160(3–4):795–809.Google Scholar
Genty, D, Massault, M, Gilmour, M, Baker, A, Verheyden, S, Kepens, E. 1999. Calculation of past dead carbon proportion and variability by the comparison of AMS 14C and TIMS U/Th ages on two Holocene stalagmites. Radiocarbon 41(3):251–70.Google Scholar
Genty, D, Baker, A, Massault, M, Proctor, C, Gilmour, M, Pons-Branchu, E, Hamelin, B. 2001. Dead carbon in stalagmite: carbonate bedrock paleodissolution vs. ageing of soil organic matter. Implications for 13C variations in speleothems. Geochimica et Cosmochimica Acta 65(20):3443–57.Google Scholar
Geyh, MA, Franke, HW. 1970. Zur Wachstumsgeschwindigkeit von Stalagmiten. Atompraxis 16:46–8.Google Scholar
Geyh, MA, Schlüchter, C. 1998. Calibration of the 14C time scale beyond 22,000 BP. Radiocarbon 40(1):475–82.Google Scholar
Goslar, T, Hercman, H, Pazdur, A. 2000. Comparison of U-series and radiocarbon dates of speleothems. Radiocarbon 42(3):403–14.Google Scholar
Harrison, K, Broecker, W, Bonani, G. 1993. A strategy for estimating the impact of CO2 fertilization on soil carbon storage. Global Biogeochemical Cycles 7(1):69–80.Google Scholar
Hendy, CH. 1970. The use of 14C in the study of cave processes. In: Olsson, IU, editor. Radiocarbon Variations and Absolute Chronology. New York: Wiley Interscience Division. p 419–43.Google Scholar
Hendy, CH. 1971. The isotopic geochemistry of speleothems—I. The calculation of the effects of different modes of formation on the isotopic composition of speleothems and their applicability as palaeoclimatic indicators. Geochimica et Cosmochimica Acta 35(8):801–24.Google Scholar
Hendy, CH, Wilson, AT. 1968. Palaeoclimatic data from speleothems. Nature 219(5149):48–51.Google Scholar
Hoffmann, DL, Beck, JW, Richards, D, Smart, PL, Singarayer, JS, Ketchmark, T, Hawkesworth, CJ. 2010. Towards radiocarbon calibration beyond 28 ka using speleothems from the Bahamas. Earth and Planetary Science Letters 289(1–2):1–10.Google Scholar
Huang, YM, Fairchild, IJ, Borsato, A, Frisia, S, Cassidy, NJ, McDermott, F, Hawkesworth, CJ. 2001. Seasonal variations in Sr, Mg and P in modern speleothems (Grotta di Ernesto, Italy). Chemical Geology 175(3–4):429–48.Google Scholar
Levin, I, Kromer, B. 2004. The tropospheric 14CO2 level in mid-latitudes of the Northern Hemisphere (1959–2003. Radiocarbon 46(3):1261–72.Google Scholar
Levin, I, Naegler, T, Kromer, B, Diehl, M, Francey, RJ, Gomez-Pelaez, AJ, Steele, LP, Wagenbach, D, Weller, R, Worthy, DS. 2010. Observations and modelling of the global distribution and long-term trend of atmospheric 14CO2 . Tellus B 62(1):26–46.Google Scholar
Li, W-X, Lundberg, J, Dickin, AP, Ford, DC, Schwarcz, HP, McNutt, R, Williams, D. 1989. High-precision mass-spectrometric uranium-series dating of cave deposits and implications for palaeoclimate studies. Nature 339(6225):534–6.Google Scholar
Libby, WF, Anderson, EC, Arnold, JR. 1949. Age determination by radiocarbon content: world-wide assay of natural radiocarbon. Science 109(2827):227–28.Google Scholar
Mattey, D, Lowry, D, Duffet, J, Fisher, R, Hodge, E, Frisia, S. 2008. A 53 year seasonally resolved oxygen and carbon isotope record from a modern Gibraltar speleothem: reconstructed drip water and relationship to local precipitation. Earth and Planetary Science Letters 269(1–2):80–95.CrossRefGoogle Scholar
McDermott, F. 2004. Palaeo-climate reconstruction from stable isotope variations in speleothems: a review. Quaternary Science Reviews 23(7–8):901–18.Google Scholar
McDermott, F, Frisia, S, Huang, Y, Longinelli, A, Spiro, B, Heaton, THE, Hawkesworth, CJ, Borsato, A, Keppens, E, Fairchild, IJ, van der Borg, K, Verheyden, S, Selmo, EM. 1999. Holocene climate variability in Europe: evidence from δ18O, textural and extension-rate variations in three speleothems. Quaternary Science Reviews 18(8–9):1021–38.Google Scholar
Mook, WG, de Vries, JJ. 2000. Environmental Isotopes in the Hydrological Cycle Principles and Applications -Volume I: Introduction - Theory, Methods, Review. Vienna: IAEA.Google Scholar
Reimer, PJ, Baillie, MGL, Bard, E, Bayliss, A, Beck, JW, Bertrand, CJH, Blackwell, PG, Buck, CE, Burr, GS, Cutler, KB, Damon, PE, Edwards, RL, Fairbanks, RG, Friedrich, M, Guilderson, TP, Hogg, AG, Hughen, KA, Kromer, B, McCormac, G, Manning, S, Bronk Ramsey, C, Reimer, RW, Remmele, S, Southon, JR, Stuiver, M, Talamo, S, Taylor, FW, van der Plicht, J, Weyhenmeyer, CE. 2004. IntCal04 terrestrial radiocarbon age calibration, 0–26 cal kyr BP. Radiocarbon 46(3):1029–58.Google Scholar
Saliège, JF, Fontes, JC. 1984. Essai de détermination expérimental du fractionnement des isotopes 13C et 14C du carbone au cours de processus naturels. International Journal of Applied Radiation and Isotopes 35(1):55–62.Google Scholar
Salomons, W, Mook, WG. 1986. Isotope geochemistry of carbonates in the weathering zone. In: Fritz, P, Fontes, JC, editors. Handbook of Isotope Geochemistry, 1 The Terrestrial Environment. Amsterdam: Elsevier. p 239–70.Google Scholar
Scholz, D, Hoffmann, D. 2008. 230Th/U-dating of fossil reef corals and speleothems. Quaternary Science Journal 57(1–2):52–77.Google Scholar
Schwarcz, HP. 1986. Geochronology and isotopic geochemistry of speleothems. In: Fritz, P, Fontes, JC, editors. Handbook of Isotope Geochemistry, 1 The Terrestrial Environment. Amsterdam: Elsevier. p 271–303.Google Scholar
Skog, G. 2007. The single stage AMS machine at Lund University: status report. Nuclear Instruments and Methods in Physics Research B 259(1):1–6.Google Scholar
Smith, CL, Fairchild, IJ, Spötl, C, Frisia, S, Borsato, A, Moreton, SG, Wynn, PM. 2009. Chronology building using objective identification of annual signals in trace element profiles of stalagmites. Quaternary Geochronology 4(1):11–21.Google Scholar
Tegen, I, Dörr, H. 1996. 14C measurements of soil organic matter, soil CO2 and dissolved organic carbon. Radiocarbon 38(2):247–51.Google Scholar
Thornthwaite, CW. 1948. An approach toward a rational classification of climate. Geographical Review 38(1):55–94.Google Scholar
Trumbore, SE. 2000. Age of soil organic matter and soil respiration: radiocarbon constraints on belowground C dynamics. Ecological Applications 10(2):399–411.Google Scholar
Trumbore, SE, Davidson, EA, de Camargo, PB, Nepstad, DC, Martinelli, LA. 1995. Belowground cycling of carbon in forests and pastures of eastern Amazonia. Global Biogeochemical Cycles 9(4):515–28.Google Scholar
Vogel, JC, Kronfeld, J. 1997. Calibration of radiocarbon dates for the Late Pleistocene using U/Th dates on stalagmites. Radiocarbon 39(1):27–32.Google Scholar
Wackerbarth, A, Scholz, D, Fohlmeister, J, Mangini, A. 2010. Modelling the δ18O value of cave drip water and speleothem calcite. Earth and Planetary Science Letters 299(3–4):367–97.Google Scholar
Wendt, I, Stahl, W, Geyh, MA, Fauth, F. 1967. Model experiments for 14C water-age determinations. In: Isotopes in Hydrology, Proceedings of the IAEA. STI/PUB/141. Vienna: IAEA. p 321–37.Google Scholar
Wigley, TML. 1975. Carbon-14 dating of groundwater from closed and open systems. Water Resources Research 11(2):324–8.Google Scholar