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Radiocarbon Calibration and Comparison to 50 Kyr BP with Paired 14C and 230Th Dating of Corals from Vanuatu and Papua New Guinea

  • K B Cutler (a1), S C Gray (a2), G S Burr (a3), R L Edwards (a1), F W Taylor (a4), G Cabioch (a5), J W Beck (a3), H Cheng (a1) and J Moore (a3)...

We calibrated portions of the radiocarbon time scale with combined 230Th, 231Pa, 14C measurements of corals collected from Espiritu Santo, Vanuatu and the Huon Peninsula, Papua New Guinea. The new data map 14C variations ranging from the current limit of the tree-ring calibration [11,900 calendar years before present (cal BP), Kromer and Spurk 1998, now updated to 12,400 cal B P, see Kromer et al., this issue], to the 14C-dating limit of 50,000 cal BP, with detailed structure between 14 to 16 cal kyr BP and 19 to 24 cal kyr BP. Samples older than 25,000 cal BP were analyzed with high-precision 231Pa dating methods (Pickett et al. 1994; Edwards et al. 1997) as a rigorous second check on the accuracy of the 230Th ages. These are the first coral calibration data to receive this additional check, adding confidence to the age data forming the older portion of the calibration. Our results, in general, show that the offset between calibrated and 14C ages generally increases with age until about 28,000 cal BP, when the recorded 14C age is nearly 6800 yr too young. The gap between ages before this time is less; at 50,000 cal BP, the recorded 14C age is 4600 yr too young. Two major 14C-age plateaus result from a 130 drop in Δ14C between 14–15 cal kyr BP and a 700 drop in Δ14C between 22–25 cal kyr BP. In addition, a large atmospheric Δ14C excursion to values over 1000 occurs at 28 cal kyr BP. Between 20 and 10 cal kyr BP, a component of atmospheric Δ14C anti-correlates with Greenland ice δ18O, indicating that some portion of the variability in atmospheric Δ14C is related to climate change, most likely through climate-related changes in the carbon cycle. Furthermore, the 28-kyr excursion occurs at about the time of significant climate shifts. Taken as a whole, our data indicate that in addition to a terrestrial magnetic field, factors related to climate change have affected the history of atmospheric 14C.

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      Radiocarbon Calibration and Comparison to 50 Kyr BP with Paired 14C and 230Th Dating of Corals from Vanuatu and Papua New Guinea
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      Radiocarbon Calibration and Comparison to 50 Kyr BP with Paired 14C and 230Th Dating of Corals from Vanuatu and Papua New Guinea
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J Adkins , EA Boyle . 1997. Changing atmospheric Δ14C and the record of deep-water paleoventilation ages. Paleoceanography 12:337–44.

M Andree , H Oeschger , W Broecker , N Beavan , M Klas , G Bonani , HJ Hofmann , M Suter , W Wölfli , T-H. Peng 1986. Limits on the ventilation rate for the deep ocean over the last 12,000 years. Climate Dynamics 1:5362.

E Bard , B Hamelin , RG Fairbanks , A Zindler . 1990. Calibration of the 14C time scale over the past 30,000 years using mass spectrometric U-Th ages from Barbados corals. Nature 345:405–10.

E Bard , M Arnold , RG Fairbanks , B Hamelin . 1993. 230Th-234U and 14C ages obtained by mass spectrometry on corals. Radiocarbon 35(1):191–9.

E Bard , B Hamelin , M Arnold , L Montaggioni , G Cabioch , G Faure , F Rougerie . 1996. Deglacial sea-level record from Tahiti corals and the timing of global meltwater discharge. Nature 382:241–4.

E Bard , M Arnold , B Hamelin , N Tisnerat-Laborde , G Cabioch . 1998. Radiocarbon calibration by means of mass spectrometric 230Th/234U and 14C ages of corals: an updated database including samples from Barbados, Mururoa and Tahiti. Radiocarbon 40(3):1085–92.

E Bard , F Rostek , G. Ménot-Combes 2004. Radiocarbon calibration beyond 20,000 14C yr BP by means of planktonic foraminifera of the Iberian Margin. Quaternary Research 61:204–14.

JW Beck , DA Richards , RL Edwards , BW Silverman , PL Smart , DJ Donahue , S Hererra-Osterheld , GS Burr , L Calsoyas , AJT Jull , D Biddulph . 2001. Extremely large variations of atmospheric 14C concentration during the last glacial period. Science 292:2453–8.

G Bond , H Heinrich , W Broecker , L Labeyrie , J McManus , J Andrews , S Huon , R Jantschik , S Clasen , C Simet , K Tedesco , M Klas , G Bonani , S Ivy . 1992. Evidence for massive discharges of icebergs into the North Atlantic Ocean during the last glacial period. Nature 360:245–9.

G Bond , W Broecker , S Johnsen , J McManus , L Labeyrie , J Jouzel , G Bonani . 1993. Correlations between climate records from North Atlantic sediments and Greenland ice. Nature 365:143–7.

GS Burr , RL Edwards , DJ Donahue , ERM Druffel , FW Taylor . 1992. Mass spectrometric 14C and U-Th measurements in coral. Radiocarbon 34(3):611–8.

GS Burr , JW Beck , FW Taylor , J Recy , RL Edwards , G Cabioch , T Correge , DJ Donahue , JM O'Malley . 1998. A high-resolution radiocarbon calibration between 11,700 and 12,400 calendar years BP derived from 230Th ages of corals from Espiritu Santo Island, Vanuatu. Radiocarbon 40(3):1093–105.

J Chappell , H Polach . 1991. Post-glacial sea-level rise from a coral record at Huon Peninsula, Papua New Guinea. Nature 349:147–9.

H Cheng , RL Edwards , J Hoff , CD Gallup , DA Richards , Y Asmerom . 2000. The half-lives of uranium-234 and thorium-230. Chemical Geology 169:1733.

KB Cutler , RL Edwards , FW Taylor , H Cheng , J Adkins , CD Gallup , PM Cutler , GS Burr , J Chappell , AL Bloom . 2003. Rapid sea-level fall and deep ocean temperature change since the last interglacial period. Earth and Planetary Science Letters 206:253–71.

RL Edwards , JH Chen , TL Ku , GJ Wasserburg . 1987b. Precise timing of the last interglacial period from mass spectrometric determination of 230Th in corals. Science 236:1547–53.

RL Edwards , JW Beck , GS Burr , DJ Donahue , JMA Chappell , AL Bloom , ERM Druffel , FW Taylor . 1993. A large drop in atmospheric 14C/12C and reduced melting in the Younger Dryas, documented with 230Th ages of corals. Science 260:962–8.

RL Edwards , H Cheng , MT Murrell , SJ Goldstein . 1997. Protactinium-231 dating of carbonates by thermal ionization mass spectrometry: implications for Quaternary climate change. Science 276:782–6.

RL Edwards , CD Gallup , H Cheng . 2003. Uranium-series dating of marine and lacustrine carbonates. In: B Bourdon , G Henderson , C Lundstrom , S Turner , editors. Reviews in Mineralogy and Geochemistry v52: Uranium-Series Geochemistry, Chapter 9. Washington, DC: Mineralogical Society of America. p 363406.

RG Fairbanks . 1989. A 17,000-year glacio-eustatic sea level record: influence of glacial melting rates on the Younger Dryas event and deep-ocean circulation. Nature 342:637–42.

RC Finkel , J Nishiizumi . 1997. 10Be concentration in the Greenland Ice Sheet Project 2 Ice Core from 3 to 40 ka. Journal of Geophysical Research 102:26,699706.

CD Gallup , RL Edwards , RG Johnson . 1994. The timing of high sea levels over the past 200,000 years. Science 263:796800.

D Genty , M Massault , M Gilmour , A Baker , S Verheyden , E Kepens . 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.

T Goslar , M Arnold , E Bard , T Kuc , MF Pazdur , M Ralska-Jasiewiczowa , K Rozanski , N Tisnerat , A Walanus , B Wicik , K Wieckowski . 1995. High concentration of atmospheric 14C during the Younger Dryas cold episode. Nature 377:414–7.

T Goslar , M Arnold , N Tisnerat-Laborde , J Czernik , K Wieckowski . 2000. Variations of Younger Dryas atmospheric radiocarbon explicable without ocean circulation changes. Nature 403:877–80.

PM Grootes , M Stuiver . 1997. Oxygen-18/16 variability in Greenland snow and ice with 103 to 105-year time resolution. Journal of Geophysical Research 102: 26,45570.

Y Guyodo , J-P. Valet 1996. Relative variations in geomagnetic intensity from sedimentary records: the past 200,000 years. Earth and Planetary Science Letters 143:2336.

I Hajdas , SD Ivy , J Beer , G Bonani , D Imboden , AF Lotter , M Sturm , M Suter . 1993. AMS radiocarbon dating and varve chronology of Lake Soppensee: 6000 to 12,000 14C years BP. Climate Dynamics 9:107–16.

I Hajdas , B Zolitschka , SD Ivy-Ochs , J Beer , G Bonani , SAG Leroy , JW Negendank , M Ramrath , M Suter . 1995. AMS radiocarbon dating of annually laminated sediments from Lake Holzmaar, Germany. Quaternary Science Reviews 14:137–43.

B Hamelin , E Bard , A Zindler , RG Fairbanks . 1991. 234U/238U mass spectrometry of corals: How accurate is the U-Th age of the last interglacial period? Earth and Planetary Science Letters 106:169–80.

GM Henderson . 2002. Seawater 234U/238U during the last 800,000 years. Earth and Planetary Science Letters 199:97110.

JC Houtermans , HE Suess . 1973. Reservoir models and production rate variations of natural radiocarbon. Journal of Geophysical Research 78:1897.

KA Hughen , JT Overpeck , SJ Lehman , M Kashgarian , J Southon , LC Peterson , R Alley , DM Sigman . 1998. Deglacial changes in ocean circulation from an extended radiocarbon calibration. Nature 391:65–8.

KA Hughen , JR Southon , SJ Lehman , JT Overpeck . 2000. Synchronous radiocarbon and climate shifts during the last deglaciation. Science 290:1951–4.

K Hughen , S Lehman , J Southon , J Overpeck , O Marchal , C Herring , J Turnbull . 2004. 14C activity and global carbon cycle changes over the past 50,000 years. Science 303:202–7.

RS Keir . 1983. Reduction of thermohaline circulation during the deglaciation: the effect on atmospheric radiocarbon and CO2. Earth and Planetary Science Letters 64:445–56.

H Kitagawa , J. van der Plicht 1998. Atmospheric radiocarbon calibration to 45,000 yr BP: Late Glacial fluctuations and cosmogenic isotope production. Science 279:1187–90.

TL Ku , KG Knauss , GG Mathieu . 1977. Uranium in the open ocean: concentration and isotopic composition. Deep-Sea Research 24:1005–17.

JF McManus , R Francois , J-M Gherardi , LD Keigwin , S. Brown-Leger 2004. Collapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changes. Nature 428:834–7.

Y Ota , J Chappell , R Kelley , N Yonekura , E Matsumoto , T Nishimura , J Head . 1993. Holocene coral reef terraces and coseismic uplift of Huon Peninsula, Papua New Guinea. Quaternary Research 40:177–88.

DA Pickett , MT Murrell , RW Williams . 1994. Determination of femtogram quantities of protactinium in geologic samples by thermal ionization mass spectrometry. Analytical Chemistry 66:1044–9.

GM Raisbeck , F Yiou , D Bourles , C Lorius , J Jouzel , NI Barkov . 1987. Evidence for two intervals of enhanced 10Be deposition in Antarctic ice during the last glacial period. Nature 326:273–7.

FM Richter , KK Turekian . 1993. Simple models for the geochemical response of the ocean to climatic and tectonic forcing. Earth and Planetary Science Letters 119:121–31.

AD Russell , S Emerson , BK Nelson , J Erez , DW Lea . 1994. Uranium in foraminiferal calcite as a recorder of seawater uranium concentrations. Geochimica et Cosmochimica Acta 58:671–81.

A Schramm , M Stein , SL Goldstein . 2000. Calibration of the 14C time scale to >40 ka by 234U-230Th dating of Lake Lisan sediments (last glacial Dead Sea). Earth and Planetary Science Letters 175:2740.

CC Shen , H Cheng , RL Edwards , S Bradley Moran , HN Edmonds , JA Hoff , RB Thomas . 2003. Measurement of attogram quantities of 231Pa in dissolved and particulate fractions of seawater by isotope dilution thermal ionization mass spectroscopy. Analytical Chemistry 75:1075–9.

U Siegenthaler , M Heimann , H Oeschger . 1980. 14C variations caused by changes in the global carbon cycle. Radiocarbon 22(2):177–91.

EL Sikes , CR Samson , TP Guilderson , WR Howard . 2000. Old radiocarbon ages in the southwest Pacific Ocean during the last glacial period and deglaciation. Nature 405:555–9.

M Stein , GJ Wasserburg , P Aharon , JH Chen , ZR Zhu , A Bloom , J Chappell . 1993. TIMS U-series dating and stable isotopes of the last interglacial event in Papua New Guinea. Geochimica et Cosmochimica Acta 57: 2541–54.

M. Stuiver 1978. Radiocarbon time scale tested against magnetic and other dating methods. Nature 273:271–4.

M Stuiver , PM Grootes , TF Braziunas . 1995. The GISP2 δ18O record of the past 16,500 years and the role of the sun, ocean, and volcanoes. Quaternary Research 44: 341–54.

M Stuiver , PJ Reimer , E Bard , JW Beck , GS Burr , KA Hughen , B Kromer , G McCormac , J van der Plicht , M Spurk . 1998. IntCal98 radiocarbon age calibration, 24,000–0 cal BP. Radiocarbon 40(3):1041–83.

S van Kreveld , M Sarnthein , H Erlenkeuser , P Grootes , S Jung , MJ Nadeau , U Pflaumann , A Voelker . 2000. Potential links between surging ice sheets, circulation changes, and the Dansgaard-Oeschger cycles in the Irminger Sea, 60–18 kyr. Paleoceanography 15:425–42.

F Yiou , GM Raisbeck , SM Baumgartner , J Beer , CU Hammer , SJ Johnsen , J Jouzel , PW Kubik , J Lestringuez , M Stiévenard , M Suter , P Yiou . 1997. 10Be in the GRIP ice core at Summit, Greenland. Journal of Geophysical Research 102:26,78394.

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