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Decadal Timescale Shift in the 14C Record of a Central Equatorial Pacific Coral

Published online by Cambridge University Press:  18 July 2016

A G Grottoli ,
S T Gille ,
E R M Druffel  and
R B Dunbar
A G Grottoli*
Affiliation:
Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, Pennsylvania 19104-6316, USA.
S T Gille
Affiliation:
Scripps Institution of Oceanography and Department of Mechanical and Aerospace Engineering, University of California-San Diego, La Jolla, California 92093-0230, USA. Email: sgille@ucsd.edu.
E R M Druffel
Affiliation:
Department of Earth System Science, University of California-Irvine, Irvine, California 92697-3100, USA. Email: edruffel@uci.edu.
R B Dunbar
Affiliation:
Department of Geological and Environmental Science, Stanford University, Stanford, California 94305-2115, USA. Email: dunbar@stanford.edu.
*
Corresponding author. Email: grottoli@sas.upenn.edu.
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Abstract

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Coral skeletal radiocarbon records reflect seawater ∆14C and are useful for reconstructing the history of water mass movement and ventilation in the tropical oceans. Here, we reconstructed the inter-annual variability in central equatorial Pacific surface water ∆14C from 1922–1956 using near-monthly 14C measurements in a Porites sp. coral skeleton (FI5A) from the windward side of Fanning Island (3°54′32′′N, 159°18'88′′W). The most pronounced feature in this record is a large, positive shift in the ∆14C between 1947 and 1956 that coincides with the switch of the Pacific Decadal Oscillation (PDO) from a positive to a negative phase in the mid-1940s. Although the absolute ∆14C values from 1950–1955 in FI5A differ from the ∆14C values of another coral core collected from the opposite side of the island, both records show a large, positive shift in their ∆14C records at that time. The relative increase in the ∆14C of each record is consistent with the premise that a common mechanism is controlling the ∆14C records within each coral record. Overall, the Fanning ∆14C data support the notion that a significant amount of subtropical seawater is arriving at the Equator, but does not allow us to determine the mechanism for its transport.

Type
Corals and Shells
Information
Radiocarbon , Volume 45 , Issue 1 , 2003 , pp. 91 - 99
Copyright
Copyright © The Arizona Board of Regents on behalf of the University of Arizona 

References

Barnes, DJ, Lough, JM. 1993. On the nature and causes of density banding in massive coral skeletons. Journal of Experimental Marine Biology and Ecology 167:91–108.CrossRefGoogle Scholar
Biondi, F, Gershunov, A, Cayan, DR. 2001. North Pacific decadal variability since 1661. Journal of Climate 14: 5–10.Google Scholar
Boiseau, M, Ghil, M, Juillet-Leclerc, A. 1999. Climatic trends and interdecadal variability from South-Central Pacific coral records. Geophysical Research Letters 26:2881–84.Google Scholar
Cai, W, Whetton, PH. 2001. A time-varying greenhouse warming pattern and the tropical-extratropical circulation linkage in the Pacific Ocean. Journal of Climate 14:3337–55.Google Scholar
D'Arrigo, R, Villalba, R, Wiles, G. 2001. Tree-ring estimates of Pacific decadal climate variability. Climate Dynamics 18:219–24.Google Scholar
Druffel, ERM. 1981. Radiocarbon in annual coral rings from the eastern tropical Pacific Ocean. Geophysical Research Letters 8:59–62.Google Scholar
Druffel, ERM. 1985. Detection of El Niño and decade timescale variations of sea surface temperature from banded coral records: implications for the carbon dioxide cycle. Geophysical Monographs 32:111–22.Google Scholar
Druffel, ERM. 1987. Bomb radiocarbon in the Pacific: annual and seasonal timescale variations. Journal of Marine Research 45:667–98.Google Scholar
Druffel, ERM. 1997. Geochemistry of corals: proxies of past ocean chemistry, ocean circulation, and climate. Proceedings of the National Academy of Science USA 94:8354–61.CrossRefGoogle ScholarPubMed
Druffel, ERM, Dunbar, RB, Wellington, GM, Minnis, SA. 1989. Reef-building corals and identification of ENSO warming episodes. In: Glynn, PW, editor. Volume 52. Global Ecological Consequences of the 1982–83 El Niño—Southern Oscillation. New York: Elsevier Oceanography Series. p 233–53.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 98:20,249–59.Google Scholar
Druffel, ERM, Griffin, S, Guilderson, TP, Kashgarian, M, Southon, J, Schrag, DP. 2001. Changes of subtropical North Pacific radiocarbon and correlation with climate variability. Radiocarbon 43:15–25.Google Scholar
Gu, D, Philander, SGH. 1997. Interdecadal climate fluctuations that depend on exchanges between the tropics and extratropics. Science 275:805–7.Google Scholar
Guilderson, TP, Schrag, DP. 1998a. Abrupt shift in subsur-face temperatures in the tropical Pacific associated with changes in El Niño. Science 281:240–3.Google Scholar
Guilderson, TP, Schrag, DP. 1998b. Radiocarbon variability in the western equatorial Pacific inferred from a high-resolution coral record from Nauru Island. Journal of Geophysical Research 103:24,641–50.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 42:249–56.Google Scholar
Hazeleger, W, Visbeck, M, Cane, M, Karspeck, A, Naik, N. 2001. Decadal upper-ocean temperature variability in the tropical Pacific. Journal of Geophysical Research 106:8971–88.Google Scholar
Hudson, JH, Shinn, EA, Halley, RB, Lidz, B. 1976. Sclerochronology: a tool for interpreting past environments. Geology 4:361–4.Google Scholar
Kirtman, BP, Schopf, PS. 1998. Decadal variability in ENSO predictability and prediction. Journal of Climate 11:2804–22.Google Scholar
Konishi, K, Tanaka, T, Sakanoue, M. 1981. Secular variation of radiocarbon concentrations in seawater: sclerochronological approach. Proceedings of the Fourth International Coral Reef Symposium 1:181–5.Google Scholar
Linsley, BK, Wellington, GM, Schrag, DP. 2000. Decadal sea surface temperature variability in the subtropical south Pacific from 1726 to 1997 AD. Science 290: 1145–8.Google Scholar
Liu, Z, Philander, SGH, Pacanowski, RC. 1994. A GCM study of tropical-subtropical upper-ocean water exchange. Journal of Physical Oceanography 24:2606–23.Google Scholar
Mantua, NJ, Hare, SR, Zhang, Y, Wallace, JM, Francis, RC. 1997. A Pacific interdecadal climate oscillation with impacts on salmon production. Bulletin of the American Meteorological Society 78:1069–79.2.0.CO;2>CrossRefGoogle Scholar
Minobe, S, Mantua, N. 1999. Interdecadal modulation of interannual atmospheric and oceanic variability over the North Pacific. Progress in Oceanography 43:163–92.Google Scholar
Nozaki, Y, Rye, DM, Turekian, KK, Dodge, RE. 1978. A 200-year record of carbon-13 and carbon-14 variations in a Bermuda coral. Geophysical Research Letters 5:825–28.Google Scholar
Pierce, DW, Barnett, TP, Latif, M. 2000. Connections between the Pacific Ocean tropics and midlatitudes on decadal timescales. Journal of Climate 13:1173–94.Google Scholar
Rodgers, KB, Cane, MA, Schrag, DP. 1997. Seasonal variability of sea surface Δ14C in the equatorial Pacific in an ocean circulation model. Journal of Geophysical Research 102:18,627–39.Google Scholar
Schneider, N, Venzke, S, Miller, AJ, Pierce, DW, Barnett, TP, Deser, C, Latif, M. 1999. Pacific thermocline bridge revisited. Geophysical Research Letters 26: 1329–32.Google Scholar
Southon, J, Kashgarian, M, Fontugne, M, Metivier, B, Yim, WW-S. 2002. Marine reservoir corrections for the Indian Ocean and Southeast Asia. Radiocarbon 44:167–80.Google Scholar
Stuiver, M, Polach, HA. 1977. Discussion reporting of 14C data. Radiocarbon 19:355–63.Google Scholar
Taft, BA, Kessler, WS. 1991. Variations of zonal currents in the central tropical Pacific during 1970 to 1987: sea level and dynamic height measurements. Journal of Geophysical Research 96:12,599–618.Google Scholar
Timmermann, A, Jin, F-F. 2002. A nonlinear mechanism for decadal El Niño amplitude changes. Geophysical Research Letters 29:10,1029/2001GL012269.Google Scholar
Toggweiler, JR. 1983. A six zone regionalized model for bomb radiotracers in CO2 in the upper kilometer of the Pacific Ocean. New York: Columbia University. 421 p.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 96:20467–97.Google Scholar
Vogel, JS, Nelson, DE, Southon, JR. 1987. 14C background levels in an accelerator mass spectrometry system. Radiocarbon 29:323–33.Google Scholar
Weber, JN, White, EW, Weber, PH. 1975. Correlation of density banding in reef coral skeletons with environmental parameters: the basis for interpretation of chronological records preserved in the coralla of corals. Paleobiology 1:137–49.Google Scholar
Zhang, R-H, Kagimoto, T, Zebiak, SE. 2001. Subduction of decadal North Pacific thermal anomalies in an Ocean GCM. Geophysical Research Letters 28:2449–52.Google Scholar
Zhang, R-H, Rothstein, LM, Busalacchi, AJ. 1998. Origin of upper-ocean warming and El Niño change on decadal scales in the tropical Pacific Ocean. Nature 391: 879–83.Google Scholar