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SURFACE OCEAN RADIOCARBON FROM A PORITES CORAL RECORD IN THE GREAT BARRIER REEF: 1945–2017

Published online by Cambridge University Press:  28 January 2021

Yang Wu Open the ORCID record for Yang Wu [Opens in a new window] ,
Stewart J Fallon ,
Neal E Cantin  and
Janice M Lough
Yang Wu*
Affiliation:
Research School of Earth Sciences, the Australian National University, Mills Road, Canberra, ACT 2601, Australia
Stewart J Fallon
Affiliation:
Research School of Earth Sciences, the Australian National University, Mills Road, Canberra, ACT 2601, Australia
Neal E Cantin
Affiliation:
Australian Institute of Marine Science, PMB No 3, Townsville MC, Qld 4810, Australia
Janice M Lough
Affiliation:
Australian Institute of Marine Science, PMB No 3, Townsville MC, Qld 4810, Australia
*
*Corresponding author. Email: yang.wu@anu.edu.au.
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Abstract

We present a high-resolution seawater radiocarbon (Δ14C) record from a Porites coral collected from Masthead Island in the southern Great Barrier Reef (GBR) covering the years 1945–2017. The Δ14C values from 1945–1953 (pre-bomb era) averaged –49‰. As a result of bomb-produced 14C in the atmosphere, Δ14C values started to rise rapidly from 1959, levelled off at ∼131‰ in the late 1970s and gradually decreased to ∼40.3‰ by 2017 due to the decrease in the air-sea 14C gradient and the overturning of the 14C ocean reservoir (i.e., surface ocean to subsurface ocean; atmosphere to surface ocean). The Masthead Island record is in agreement with previous 14C coral records from the southern GBR. A comparison between surface ocean and atmospheric Δ14C suggests that, since 2010, the main reservoir of bomb-derived 14C has shifted from the atmosphere to the surface ocean, potentially resulting in reversed 14C flux in regions where the CO2 gradient is favorable. The high-resolution Masthead coral Δ14C sheds light on long-term variability in air-sea exchange and GBR regional ocean dynamics associated with climate change and in conjunction with the previous records provides a robust seawater 14C reference series to date other carbonate samples.

Keywords

bomb-14CGreat Barrier Reefoceanographic changePorites coral

Information

Type
Conference Paper
Information
Radiocarbon , Volume 63 , Issue 4: Featuring: CLARa Proceedings of the 1st Latin American Radiocarbon Conference , August 2021 , pp. 1193 - 1203
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Copyright
© The Author(s), 2021. Published by Cambridge University Press for the Arizona Board of Regents on behalf of the University of Arizona

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Footnotes

Selected Papers from the 1st Latin American Radiocarbon Conference, Rio de Janeiro, 29 Jul.–2 Aug. 2019

References

REFERENCES

Andrews, AH, Asami, R, Iryu, Y, Kobayashi, DR, Camacho, F. 2016a. Bomb-produced radiocarbon in the western tropical Pacific Ocean: Guam coral reveals operation-specific signals from the Pacific Proving Grounds. Journal of Geophysical Research–Oceans 121(8):6351–6366.Google Scholar
Andrews, AH, Humphreys, RL, Sampaga, JD. 2018. Blue marlin (Makaira nigricans) longevity estimates confirmed with bomb radiocarbon dating. Canadian Journal of Fisheries and Aquatic Sciences 75(1):17–25.Google Scholar
Andrews, AH, Siciliano, D, Potts, DC, DeMartini, EE, Covarrubias, S. 2016b. Bomb radiocarbon and the Hawaiian archipelago: coral, otoliths, and seawater. Radiocarbon 58(3):531–548.Google Scholar
Andrews, JC, Gentien, P. 1982. Upwelling as a source of nutrients for the Great Barrier-Reef ecosystems – a solution to Darwin question. Marine Ecology Progress Series 8(3):257–269.Google Scholar
Cantin, NE, Fallon, SJ, Wu, Y, Lough, JM. 2018. Project ISP019: Calcification and geochemical signatures of industrial development of the Gladstone Harbour from century old coral skeletons. Report prepared for Gladstone Healthy Harbour Partnership. Australian Institute of Marine Science, Townsville, Qld. 40 p.Google Scholar
Druffel, ERM, Linick, TW. 1978. Radiocarbon in annual coral rings of Florida. Geophysical Research Letters 5(11):913–916.Google Scholar
Druffel, ERM, Suess, HE. 1983. On the radiocarbon record in banded corals – exchange parameters and net transport of (CO2)–C-14 between atmosphere and surface ocean. Journal of Geophysical Research–Oceans 88(Nc2):1271–1280.Google Scholar
Druffel, ERM. 1987. Bomb radiocarbon in the Pacific – annual and seasonal timescale variations. Journal of Marine Research 45(3):667–698.Google Scholar
Druffel, ERM, Griffin, S. 1993. Large variations of surface ocean radiocarbon—evidence of circulation changes in the Southwestern Pacific. Journal of Geophysical Research–Oceans 98(C11):20249–20259.Google Scholar
Druffel, ERM, Griffin, S. 1995. Regional variability of surface ocean radiocarbon from southern great barrier reef corals. Radiocarbon 37(2):517–524.Google Scholar
Druffel, ERM, Griffin, S. 1999. Variability of surface ocean radiocarbon and stable isotopes in the southwestern Pacific. Journal of Geophysical Research–Oceans 104(C10):23607–23613.Google Scholar
Fallon, SJ, Fifield, LK, Chappell, JM. 2010. The next chapter in radiocarbon dating at the Australian National University: Status report on the single stage AMS. Nuclear Instruments & Methods in Physics Research Section B–Beam Interactions with Materials and Atoms 268(7–8):898–901.Google Scholar
Fallon, SJ, Guilderson, TP. 2005. Extracting growth rates from the nonlaminated coralline sponge Astrosclera willeyana using bomb radiocarbon. Limnology and Oceanography–Methods 3:455–461.Google Scholar
Fallon, SJ, Guilderson, TP. 2008. Surface water processes in the Indonesian throughflow as documented by a high-resolution coral Δ14C record. Journal of Geophysical Research 113(C9).Google Scholar
Fallon, SJ, Guilderson, TP, Caldeira, K. 2003. Carbon isotope constraints on vertical mixing and air-sea CO2 exchange. Geophysical Research Letters 30(24).Google Scholar
Fallon, SJ, McCulloch, MT, van Woesik, R, Sinclair, DJ. 1999. Corals at their latitudinal limits: laser ablation trace element systematics in Porites from Shirigai Bay, Japan. Earth and Planetary Science Letters 172(3–4):221–238.Google Scholar
Furnas, MJ, Mitchell, AW. 1996. Nutrient inputs into the central Great Barrier Reef (Australia) from subsurface intrusions of Coral Sea waters: a two-dimensional displacement model. Continental Shelf Research 16.9:1127–1148.Google Scholar
Godfrey, JS, Cresswell, GR, Golding, TJ, Pearce, AF. 1980. The separation of the east Australian current. Journal of Physical Oceanography 10(3):430–440.Google Scholar
Guilderson, TP, Fallon, S, Moore, MD, Schrag, DP, Charles, CD. 2009. Seasonally resolved surface water Δ14C variability in the Lombok Strait: A coralline perspective. Journal of Geophysical Research 114(C7).Google Scholar
Guilderson, TP, Schrag, DP. 1998. Abrupt shift in subsurface temperatures in the Tropical Pacific associated with changes in El Nino. Science 281(5374):240–243.Google Scholar
Guilderson, TP, Schrag, DP, Cane, MA. 2004. Surface water mixing in the Solomon Sea as documented by a high-resolution coral C-14 record. Journal of Climate 17(5):1147–1156.Google Scholar
Guilderson, TP, Schrag, DP, Goddard, E, Kashgarian, M, Wellington, GM, Linsley, BK. 2000. Southwest subtropical Pacific surface water radiocarbon in a high-resolution coral record. Radiocarbon 42(2):249–256.Google Scholar
Guilderson, TP, Schrag, DP, Kashgarian, M, Southon, J. 1998. Radiocarbon variability in the western equatorial Pacific inferred from a high-resolution coral record from Nauru Island. Journal of Geophysical Research–Oceans 103(C11):24641–24650.Google Scholar
Hirabayashi, S, Yokoyama, Y, Suzuki, A, Miyairi, Y, Aze, T. 2017a. Multidecadal oceanographic changes in the western Pacific detected through high-resolution bomb-derived radiocarbon measurements on corals. Geochemistry Geophysics Geosystems 18(4):1608–1617.Google Scholar
Hirabayashi, S, Yokoyama, Y, Suzuki, A, Miyairi, Y, Aze, T, Siringan, F, Maeda, Y. 2017b. Radiocarbon variability recorded in coral skeletons from the northwest of Luzon Island, Philippines. Geoscience Letters 4(1):15.Google Scholar
Hua, Q, Barbetti, M, Rakowski, AZ. 2013. Atmospheric Radiocarbon for the Period 1950–2010. Radiocarbon 55(4):2059–2072.Google Scholar
Key, RM. 1996. WOCE Pacific Ocean radiocarbon program. Radiocarbon 38(3):415–423.Google Scholar
Key, RM, Quay, PD, Jones, GA, McNichol, AP, vonReden, KF, Schneider, RJ. 1996. WOCE AMS radiocarbon. 1. Pacific Ocean results (P6, P16 and P17). Radiocarbon 38(3):425–518.Google Scholar
Key, RM, Quay, PD, Schlosser, P, McNichol, AP, von Reden, KF, Schneider, RJ, Elder, KL, Stuiver, M, Ostlund, HG. 2002. WOCE radiocarbon IV: Pacific Ocean results; P10, P13N, P14C, P18, P19 & S4P. Radiocarbon 44(1):239–392.Google Scholar
Kumamoto, Y, Murata, A, Kawano, T, Watanabe, S, Fukasawa, M. 2013. Decadal changes in bombproduced radiocarbon in the Pacific Ocean from the 1990s to 2000s. Radiocarbon 55(2–3):1641–1650.Google Scholar
Lough, JM, Barnes, DJ. 1990. Measurement of density in slices of coral skeleton – effect of densitometer beam diameter. Journal of Experimental Marine Biology and Ecology 143(1–2):91–99.Google Scholar
Nydal, R, Lovseth, K. 1983. Tracing bomb 14C in the atmosphere 1962–1980. Journal of Geophysical Research–Oceans 88(Nc6):3621–3642.Google Scholar
Oke, PR, Roughan, M, Cetina-Heredia, P, Pilo, GS, Ridgway, KR, Rykova, T, Archer, MR, Coleman, RC, Kerry, CG, Rocha, C, Schaeffer, A, Vitarelli, E. 2019. Revisiting the circulation of the East Australian Current: its path, separation, and eddy field. Progress in Oceanography 176.Google Scholar
Ramos, RD, Goodkin, NF, Druffel, ERM, Fan, TY, Siringan, FP. 2019. Interannual coral Δ14C records of surface water exchange across the Luzon Strait. Journal of Geophysical Research–Oceans 124(1):491–505.Google Scholar
Steinberg, C. 2007. Impacts of climate change on the physical oceanography of the Great Barrier Reef.Google Scholar
Stuiver, M, Polach, HA. 1977. Reporting of 14C data: discussion. Radiocarbon 19(3):355–363.Google Scholar
Tans, PP, Dejong, AFM, Mook, WG. 1979. Natural atmospheric 14C variation and the Suess effect. Nature 280(5725):826–827.Google Scholar
Turnbull, JC, Fletcher, SE, Brailsford, GW, Moss, RC, Norris, MW, Steinkamp, K. 2017. Sixty years of radiocarbon dioxide measurements at Wellington, New Zealand: 1954–2014. Atmospheric Chemistry and Physics 17(23): 14771–14784. doi: 10.5194/acp-17-14771-2017.Google Scholar
Toggweiler, JR, Dixon, K, Broecker, WS. 1991. The Peru upwelling and the ventilation of the South-Pacific thermocline. Journal of Geophysical Research–Oceans 96(C11):20467–20497.Google Scholar
Wijeratne, S, Pattiaratchi, C, Proctor, R. 2018. Estimates of surface and subsurface boundary current transport around Australia. Journal of Geophysical Research–Oceans 123(5):3444–3466.Google Scholar
Wu, Y, Fallon, S. 2020. Prebomb to postbomb 14C history from the west side of Palawan Island: insights into oceanographic changes in the South China Sea. Journal of Geophysical Research: Oceans 125:e2019JC015979. doi: 10.1029/2019JC015979.Google Scholar
Zhai, FG, Hu, DX, Wang, QY, Wang, FJ. 2014. Long-Term trend of Pacific South Equatorial Current bifurcation over 1950–2010. Geophysical Research Letters 41(9):3172–3180.Google Scholar
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