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What Is the Carbon Origin of Early-Wood?

  • Sabrina G K Kudsk (a1), Jesper Olsen (a2), Lasse N Nielsen (a3), Alexandra Fogtmann-Schulz (a1), Mads F Knudsen (a1) and Christoffer Karoff (a3)...

Substantial amounts of annual radiocarbon (14C) data have recently been produced with the purpose of increasing the time resolution of 14C records used for constructing the calibration curve and for studying the occurrence of abrupt cosmic-ray events. In this study, we investigate if it is possible to resolve sub-annual scale changes in the atmospheric 14C content by measuring radiocarbon in early-wood and late-wood fractions from Danish oak. The tree-ring samples span the period 1954–1970 CE, hereby covering the peak of the bomb pulse. A least squares test comparing the atmospheric 14C content and the new sub-annual 14C record from Danish tree rings reveals that by measuring early-wood and late-wood fractions, it may be possible to resolve sub-annual variations in past atmospheric 14C levels.

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Beramendi-Orosco, LE, Gonzalez-Hernandez, G, Villanueva-Diaz, J, Santos-Arevalo, FJ, Gomez-Martinez, I, Cienfuegos-Alvarado, E, Morales-Puente, P, Urrutia-Fucugauchi, J. 2010. Modern radiocarbon levels for Northeastern Mexico derived from tree rings: A comparison with Northern Hemisphere zones 2 and 3 curves. Radiocarbon 52(3):907914.
Carbone, MS, Czimczik, CI, Keenan, TF, Murakami, PF, Pederson, N, Schaberg, PG, Xu, X, Richardson, AD. 2013. Age, allocation and availability of nonstructual carbon in mature red maple trees. New Phytologist 200:11451155.
Dee, MW, Pope, BJS. 2016. Anchoring historical sequences using a new source of astro-chronological tie-points. Proceedings of the Royal Society A – Mathematical Physical and Engineering Sciences 472(2192):11.
Fogtmann-Schulz, A, Østbø, SM, Nielsen, SGB, Olsen, J, Karoff, C, Knudsen, MF. 2017. Cosmic-ray event in 994 CE recorded in radiocarbon from Danish Oak. Geophysical Research Letters.
Güttler, D, Adolphi, F, Beer, J, Bleicher, N, Boswijk, G, Christl, M, Hogg, A, Palmer, J, Vockenhuber, C, Wacker, L, Wunder, J. 2015. Rapid increase in cosmogenic 14C in AD 775 measured in New Zealand kauri trees indicates short-lived increase in 14C production spanning both hemispheres. Earth and Planetary Science Letters 411:290297.
Graven, HD, Guilderson, TP, Keeling, RF. 2012. Observations of radiocarbon in CO2 at seven global sampling sites in the Scripps flask network: Analysis of spatial gradient and seasonal cycles. Journal of Geophysical Research – Atmospheres 117(D2):D02303.
Hua, Q, Barbetti, M, Rakowski, AZ. 2013. Atmospheric radiocarbon for the period 1950–2010. Radiocarbon 55(4):20592072.
Hultén, E. 1971. Atlas över växternas utbredning i Norden. Generalstabens litografiska anstalts förlag, Stockholm.
Jull, AJT, Panyushkina, IP, Lange, TE, Kukarskih, VV, Myglan, VS, Clark, KJ, Salzer, MW, Burr, GS, Leavitt, SW. 2014. Excursions in the 14C record at A.D. 774–775 in tree rings from Russia and America. Geophysical Research Letters 41(8):30043010.
Ladefoged, K. 1952. The periodicity of wood formation. [Det Kongelige Danske Videnskabernes Selskab.] Biologiske Skrifter 7(3).
Miyahara, H, Masuda, K, Muraki, Y, Kitagawa, H, Nakamura, T. 2006. Variation of solar cyclicity during the Spoerer Minimum. Journal of Geophysical Research-Space Physics 111(A3).
Miyake, F, Nagaya, K, Masuda, K, Nakamura, T. 2012. A signature of cosmic-ray increase in AD 774–775 from tree rings in Japan. Nature 486(7402):240242.
Miyake, F, Masuda, K, Nakamura, T. 2013. Another rapid event in the carbon-14 content of tree rings. Nature Communications 4.
Olsen, J, Tikhomirov, D, Grosen, C, Heinemeier, J, Klein, M. 2017. Radiocarbon analysis on the new AARAMS 1MV Tandetron. Radiocarbon 59(3):905913.
Olsson, IU, Possnert, G. 1992. 14C activity in different sections and chemical-fractions of oak tree rings, AD 1938-1981. Radiocarbon 34(3):757767.
Pilcher, JR. 1995. Biological considerations in the interpretation of stable isotope ratios in oak tree-rings. In: Frinzel B, Stauffer B, Weiss MM, editors. Paläoklimaforschung/Paleoclimate Research 15. European Science Foundation, Strasbourg, France (1993). p 157161.
Rakowski, AZ, Nakamura, T, Pazdur, A, Meadows, J. 2013. Radiocarbon concentration in annual tree rings from the Salamanca region, western Spain. Radiocarbon 55(2–3):15331540.
Rakowski, AZ, Krąpiec, M, Huels, M, Pawlyta, J, Dreves, A, Meadows, J. 2015. Increase of radiocarbon concentration in tree rings from Kujawy (SE Poland) around AD 774–775. Nuclear Instruments and Methods in Physics Research B 361:564568.
Reimer, PJ, Brown, TA, Reimer, RW. 2004. Discussion: Reporting and calibration of post-bomb 14C data. Radiocarbon 46(3):12991304.
Richardson, AD, Carbone, MS, Keenan, TF, Czimczik, CI, Hollinger, DY, Murakami, P, Schaberg, PG, Xu, X. 2013. Seasonal dynamics and age of stemwood nonstructual carbohydrates in temperate forest trees. New Phytologist 197:850861.
Schweingruber, FH. 1988. Tree Rings – Basics and Applications of Dendrochronolgy. Kluwer Academic Publishers.
Southon, JR, Magana, AL. 2010. A comparison of cellulose extraction and ABA pretreatment methods for AMS 14C dating of ancient wood. Radiocarbon 52(3):13711379.
Speer, JH. 2010. Fundamentals of Tree-Ring Research. University of Arizona Press. 509 p.
Tauber, H. 1960. Post-Bomb Rise in Radiocarbon Activity in Denmark. Science 131(3404):921922.
Wang, FY, Yu, H, Zou, YC, Dai, ZG, Cheng, KS. 2017. A rapid cosmic-ray increase in BC 3372–3371 from ancient buried tree rings in China. Nature Communications 8(1):1487.
Xu, S, Cook, GT, Cresswell, AJ, Dunbar, E, Freeman, S, Hastie, H, Hou, XL, Jacobsson, P, Naysmith, P, Sanderson, DCW. 2015. Radiocarbon concentration in modern tree rings from Fukushima, Japan. Journal of Environmental Radioactivity 146:6772.
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  • ISSN: 0033-8222
  • EISSN: 1945-5755
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