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IntCal13 and Marine13 Radiocarbon Age Calibration Curves 0–50,000 Years cal BP

  • Paula J Reimer (a1), Edouard Bard (a2), Alex Bayliss (a3), J Warren Beck (a4), Paul G Blackwell (a5), Christopher Bronk Ramsey (a6), Caitlin E Buck (a5), Hai Cheng (a7) (a8), R Lawrence Edwards (a7), Michael Friedrich (a9) (a10), Pieter M Grootes (a11), Thomas P Guilderson (a12) (a13), Haflidi Haflidason (a14), Irka Hajdas (a15), Christine Hatté (a16), Timothy J Heaton (a5), Dirk L Hoffmann (a17), Alan G Hogg (a18), Konrad A Hughen (a19), K Felix Kaiser (a20) (a21), Bernd Kromer (a10), Sturt W Manning (a22), Mu Niu (a5), Ron W Reimer (a1), David A Richards (a23), E Marian Scott (a24), John R Southon (a25), Richard A Staff (a6), Christian S M Turney (a26) and Johannes van der Plicht (a27) (a28)...

The IntCal09 and Marine09 radiocarbon calibration curves have been revised utilizing newly available and updated data sets from 14C measurements on tree rings, plant macrofossils, speleothems, corals, and foraminifera. The calibration curves were derived from the data using the random walk model (RWM) used to generate IntCal09 and Marine09, which has been revised to account for additional uncertainties and error structures. The new curves were ratified at the 21st International Radiocarbon conference in July 2012 and are available as Supplemental Material at The database can be accessed at

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AustinWEN, HibbertFD. 2012. Tracing time in the ocean: a brief review of chronological constraints (60–8 kyr) on North Atlantic marine event-based stratigraphies. Quaternary Science Reviews 36:2837.
AustinWEN, TelfordRJ, NinnemannUS, BrownL, WilsonLJ, SmallDP, BryantCL. 2011. North Atlantic reservoir ages linked to high Younger Dryas atmospheric radiocarbon concentrations. Global and Planetary Change 79(3–4):226–33.
BardE. 1988. Correction of accelerator mass spectrometry 14C ages measured in planktonic foraminifera: paleoceanographic implications. Paleoceanography 3(6):635–5.
BardE, HamelinB, FairbanksRG, ZindlerA. 1990. Calibration of the 14C timescale over the past 30,000 years using mass spectrometric U-Th ages from Barbados corals. Nature 345(6274):405–10.
BardE, ArnoldM, MangerudJ, PaterneM, LabeyrieL, DupratJ, MélièresMA, S⊘nstegaardE, DuplessyJ-C. 1994. The North Atlantic atmosphere-sea surface 14C gradient during the Younger Dryas climatic event. Earth and Planetary Science Letters 126(4):275–87.
BardE, RostekF, TuronJ-L, GendreauS. 2000. Hydrological impact of Heinrich events in the subtropical northeast Atlantic. Science 289(5483):1321–4.
BardE, RostekF, Ménot-CombesG. 2004. Radiocarbon calibration beyond 20,000 14C yr B.P. by means of planktonic foraminifera of the Iberian Margin. Quaternary Research 61(2):204–14.
BardE, MénotG, RostekF, LicariL, BöningP, EdwardsRL, ChengH, WangYJ, HeatonTJ. 2013. Radiocarbon calibration/comparison records based on marine sediments from the Pakistan and Iberian margins. Radiocarbon 55(4), this issue.
BeckJW, RichardsDA, EdwardsRL, SilvermanBW, SmartPL, DonahueDJ, Hererra-OsterheldS, BurrGS, CalsoyasL, JullAJT, BiddulphD. 2001. Extremely large variations of atmospheric 14C concentration during the last glacial period. Science 292(5526):2453–8.
BjörckS, KoçN, SkogG. 2003. Consistently large marine reservoir ages in the Norwegian Sea during the Last Deglaciation. Quaternary Science Reviews 22(5–7):429–35.
BlackwellPG, BuckCE. 2008. Estimating radiocarbon calibration curves. Bayesian Analysis 3(2):225–48.
BondevikS, MangerudJ, BirksHH, GulliksenS, ReimerP. 2006. Changes in North Atlantic radiocarbon reservoir ages during the Aller⊘d and Younger Dryas. Science 312(5779):1514–7.
Bronk RamseyC, StaffRA, BryantCL, BrockF, KitagawaH, van der PlichtJ, SchlolautG, MarshallMH, BrauerA, LambHF, PayneRL, TarasovPE, HaraguchiT, GotandaK, YonenobuH, YokoyamaY, TadaR, NakagawaT. 2012. A complete terrestrial radiocarbon record for 11.2 to 52.8 kyr B.P. Science 338(6105):370–4.
Bronk RamseyC, ScottEM, van der PlichtJ. 2013. Calibration for archaeological and environmental terrestrial samples in the time range 26–50 ka cal BP. Radiocarbon 55(4), this issue.
ButzinM, PrangeM, LohmannG. 2012. Readjustment of glacial radiocarbon chronologies by self-consistent three-dimensional ocean circulation modeling. Earth and Planetary Science Letters 317–318:177–84.
de VriesH. 1958. Variation in concentration of radiocarbon with time and location on earth. Proceedings of the Koninklijke Nederlandse Akademie Van Wetenschappen Series B 61:94102.
DurandN, DeschampsP, BardE, HamelinB, CamoinG, ThomasAL, HendersonGM, YokoyamaY, MatsuzakiH. 2013. Comparison of 14C and U-Th ages in corals from IODP #310 cores offshore Tahiti. Radiocarbon 55(4), this issue.
EdwardsRL, ChengH, WangYJ, YuanDX, KellyMJ, KongXG, WangXF, BurnettA, SmithE. 2013. A refined Hulu and Dongge Cave climate record and the timing of the climate change during the last glacial cycle. Earth and Planetary Science Letters, submitted.
EirikssonJ, LarsenG, KnudsenKL, HeinemeierJ, SimonarsonLA. 2004. Marine reservoir age variability and water mass distribution in the Iceland Sea. Quaternary Science Reviews 23(20-22):2247–68.
FriedrichM, RemmeleS, KromerB, HofmannJ, SpurkM, KaiserKF, OrcelC, KüppersM. 2004. The 12,460-year Hohenheim oak and pine tree-ring chronology from central Europe—a unique annual record for radiocarbon calibration and paleoenvironment reconstructions. Radiocarbon 46(3):1111–22.
HeatonTJ, BlackwellPG, BuckCE. 2009. A Bayesian approach to the estimation of radiocarbon calibration curves: the IntCal09 methodology. Radiocarbon 51(4):1151–64.
HeatonTJ, BardE, HughenK. 2013. Elastic tie-pointing—transferring chronologies between records via a Gaussian process. Radiocarbon 55(4), this issue.
HoffmannDL, BeckJW, RichardsDA, SmartPL, SingarayerJS, KetchmarkT, HawkesworthCJ. 2010. Towards radiocarbon calibration beyond 28 ka using speleothems from the Bahamas. Earth and Planetary Science Letters 289(1–2):110.
HoggA, PalmerJ, BoswijkG, ReimerP, BrownD. 2009. Investigating the interhemispheric 14C offset in the 1st millennium AD and assessment of laboratory bias and calibration errors. Radiocarbon 51(4):1177–86.
HoggAG, HuaQ, BlackwellPG, NiuM, BuckCE, GuildersonTP, HeatonTJ, PalmerJG, ReimerPJ, ReimerRW, TurneyCSM, ZimmermanSRH. 2013a. SHCal13 Southern Hemisphere calibration, 0–50,000 years cal BP. Radiocarbon 55(4), this issue.
HoggA, TurneyC, PalmerJ, SouthonJ, KromerB, Bronk RamseyC, BoswijkG, FenwickP, NoronhaA, StaffR, FriedrichM, ReynardL, GuetterD, WackerL, JonesR. 2013b. The New Zealand kauri (Agathis australis) research project: a radiocarbon dating intercomparison of Younger Dryas wood and implications for IntCal13. Radiocarbon 55(4), this issue.
HuaQ, BarbettiM, FinkD, KaiserKF, FriedrichM, KromerB, LevchenkoVA, ZoppiU, SmithAM, BertuchF. 2009. Atmospheric 14C variations derived from tree rings during the early Younger Dryas. Quaternary Science Reviews 28(25–26):2982–90.
HughenKA, BaillieMGL, BardE, BeckJW, BertrandCJH, BlackwellPG, BuckCE, BurrGS, CutlerKB, DamonPE, EdwardsRL, FairbanksRG, FriedrichM, GuildersonTP, KromerB, McCormacG, ManningS, Bronk RamseyC, ReimerPJ, ReimerRW, RemmeleS, SouthonJR, StuiverM, TalamoS, TaylorFW, van der PlichtJ, WeyhenmeyerCE. 2004. Marine04 marine radiocarbon age calibration, 0–26 cal kyr BP. Radiocarbon 46(3):1059–86.
HughenK, SouthonJ, LehmanS, BertrandC, TurnbullJ. 2006. Marine-derived 14C calibration and activity record for the past 50,000 years updated from the Cariaco Basin. Quaternary Science Reviews 25(23–24):3216–27.
KitagawaH, van der PlichtJ. 1998a. Atmospheric radiocarbon calibration to 45,000 yr B.P.: Late Glacial fluctuations and cosmogenic isotope production. Science 279(5354):1187–90.
KitagawaH, van der PlichtJ. 1998b. A 40,000-year varve chronology from Lake Suigetsu, Japan: extension of the 14C calibration curve. Radiocarbon 40(1):505–15.
KitagawaH, van der PlichtJ. 2000. Atmospheric radiocarbon calibration beyond 11,900 cal BP from Lake Suigetsu laminated sediments. Radiocarbon 42(3):369–80.
KromerB, FriedrichM, HughenKA, KaiserF, RemmeleS, SchaubM, TalamoS. 2004. Late Glacial 14C ages from a floating, 1382-ring pine chronology. Radiocarbon 46(3):1203–9.
KromerB, ManningSW, FriedrichM, TalamoS, TranoN. 2010. 14C calibration in the 2nd and 1st millennia BC—Eastern Mediterranean Radiocarbon Comparison Project (EMRCP). Radiocarbon 52(3):875–86.
LibbyWF, AndersonEC, ArnoldJR. 1949. Age determination by radiocarbon content: world-wide assay of natural radiocarbon. Science 109(2827):227–8.
MarshallM, SchlolautG, NakagawaT, LambH, BrauerA, StaffR, Bronk RamseyC, TarasovP, GotandaK, HaraguchiT, YokoyamaY, YonenobuH, TadaR, Suigetsu 2006 Project Members. 2012. A novel approach to varve counting using μXRF and X-radiography in combination with thin-section microscopy, applied to the Late Glacial chronology from Lake Suigetsu, Japan. Quaternary Geochronology 13:7080.
MazaudA, LajC, BardE, ArnoldM, TricE. 1991. Geomagnetic-field control of 14C production over the last 80 ky: implications for the radiocarbon time-scale. Geophysical Research Letters 18(10):1885–8.
McCormacFG, BaylissA, BrownDM, ReimerPJ, ThompsonMM. 2008. Extended radiocarbon calibration in the Anglo-Saxon period, AD 395–485 and AD 735–805. Radiocarbon 50(1):11–7.
McManusJF, FrancoisR, GherardiJ-M, KeigwinLD, Brown-LegerS. 2004. Collapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changes. Nature 428(6985):834–7.
MiyakeF, NagayaK, MasudaK, NakamuraT. 2012. A signature of cosmic-ray increase in AD 774–775 from tree rings in Japan. Nature 486(7402):240–2.
MuschelerR, BeerJ, WagnerG, LajC, KisselC, RaisbeckGM, YiouF, KubikPW. 2004. Changes in the carbon cycle during the last deglaciation as indicated by the comparison of 10Be and 14C records. Earth and Planetary Science Letters 219(3–4):325–40.
MuschelerR, BeerJ, KubikPW, SynalH-A. 2005. Geomagnetic field intensity during the last 60,000 years based on 10Be and 36Cl from the Summit ice cores and 14C. Quaternary Science Reviews 24(16–17):1849–60.
MuschelerR, KromerB, BjörckS, SvenssonA, FriedrichM, KaiserKF, SouthonJ. 2008. Tree rings and ice cores reveal 14C calibration uncertainties during the Younger Dryas. Nature Geoscience 1:263–7.
NakagawaT, GotandaK, HaraguchiT, DanharaT, YonenobuH, BrauerA, YokoyamaY, TadaR, TakemuraK, StaffRA, PayneR, Bronk RamseyC, BryantC, BrockF, SchlolautG, MarshallM, TarasovP, LambH, Suigetsu 2006 Project Members. 2012. SG06, a perfectly continuous and varved sediment core from Lake Suigetsu, Japan: stratigraphy and potential for improving the radiocarbon calibration model and understanding of late Quaternary climate changes. Quaternary Science Reviews 36:164–76.
NiuM, HeatonTJ, BlackwellPG, BuckCE. 2013. The Bayesian approach to radiocarbon calibration curve estimation: the IntCal13, Marine13, and SHCal13 methodologies. Radiocarbon 55(4), this issue.
OeschgerH, SiegenthalerU, SchottererU, GugelmannA. 1975. A box diffusion model to study the carbon dioxide exchange in nature. Tellus 27(2):168–92.
OlsenJ, RasmussenTL, ReimerPJ. 2013. North Atlantic marine radiocarbon reservoir ages through Heinrich event H4: a new method for marine age model construction. In: AustinWEN, AbbottP, DaviesS, PearceN, WastegardS, editors. Marine Tephrochronology. Geological Society of London. Special Publication. In press.
PalmerJ, LorreyA, TurneyCSM, HoggA, BaillieM, FifieldK, OgdenJ. 2006. Extension of New Zealand kauri (Agathis australis) tree-ring chronologies into Oxygen Isotope Stage (OIS) 3. Journal of Quaternary Science 21(7):779–87.
ReimerPJ, BaillieMGL, BardE, BaylissA, BeckJW, BlackwellPG, Bronk RamseyC, BuckCE, BurrGS, EdwardsRL, FriedrichM, GrootesPM, GuildersonTP, HajdasI, HeatonTJ, HoggAG, HughenKA, KaiserKF, KromerB, McCormacFG, ManningSW, ReimerRW, RichardsDA, SouthonJR, TalamoS, TurneyCSM, van der PlichtJ, WeyhenmeyerCE. 2009. IntCal09 and Marine09 radiocarbon age calibration curves, 0–50,000 years cal BP. Radiocarbon 51(4):1111–50.
ReimerPJ, BardE, BaylissA, BeckJW, BlackwellPG, Bronk RamseyC, BuckCE, EdwardsRL, FriedrichM, GrootesPM, GuildersonTP, HaflidasonH, HajdasI, HattéC, HeatonTJ, HoggAG, HughenKA, KaiserKF, KromerB, ManningSW, ReimerRW, RichardsDA, ScottEM, SouthonJR, TurneyCSM, van der PlichtJ. 2013. Selection and treatment of data for radiocarbon calibration: an update to the International Calibration (IntCal) criteria. Radiocarbon 55(4), this issue.
RothR, JoosF. 2013. A reconstruction of radiocarbon production and total solar irradiance from the Holocene 14C and CO2 records: implications of data and model uncertainties. Climate of the Past Discussions 9:1165–235.
SarntheinM, GrootesPM, KennettJP, NadeauM-J. 2007. 14C reservoir ages show deglacial changes in ocean currents and carbon cycle. In: SchmittnerA, ChiangJCH, HemmingSR, editors. Ocean Circulation: Mechanisms and Impacts - Past and Future Changes of Meridional Overturning. Geophysical Monograph 173. Washington, DC: American Geophysical Union, p 175–96.
SarntheinM, SchneiderB, GrootesPM. 2013. Peak glacial 14C ventilation ages suggest major draw-down of carbon into the abyssal ocean. Climate of the Past Discussions 9:925–65.
SchaubM, BüntgenU, KaiserKF, KromerB, TalamoS, AndersenKK, RasmussenSO. 2008. Lateglacial environmental variability from Swiss tree rings. Quaternary Science Reviews 27(1–2):2941.
SchlolautG, MarshallMH, BrauerA, NakagawaT, LambHF, StaffRA, Bronk RamseyC, BryantCL, BrockF, KosslerA, TarasovPE, YokoyamaY, TadaR, HaraguchiT, Suigetsu 2006 Project Members. 2012. An automated method for varve interpolation and its application to the Late Glacial chronology from Lake Suigetsu, Japan. Quaternary Geochronology 13:5269.
SingarayerJS, RichardsDA, RidgwellA, ValdesPJ, AustinWEN, BeckJW. 2008. An oceanic origin for the increase of atmospheric radiocarbon during the Younger Dryas. Geophysical Research Letters 35: L14707, doi::10.1029/2008GL034074.
SingerBS, GuillouH, JichaBR, LajC, KisselC, BeardBL, JohnsonCM. 2009. 40Ar/39Ar, K-Ar and 230Th 238U dating of the Laschamp excursion: a radioisotopic tie-point for ice core and climate chronologies. Earth and Planetary Science Letters 286(1–2):80–8.
SouthonJ, NoronhaAL, ChengH, EdwardsRL, WangY. 2012. A high-resolution record of atmospheric 14C based on Hulu Cave speleothem H82. Quaternary Science Reviews 33:3241.
StaffRA, Bronk RamseyC, NakagawaT, Suigetsu 2006 Project Members. 2010. A re-analysis of the Lake Suigetsu terrestrial radiocarbon dataset. Nuclear Instruments and Methods in Physics Research B 268(7–8):960–5.
StaffRA, SchlolautG, Bronk RamseyC, BrockF, BryantCL, KitagawaH, van der PlichtJ, MarshallMH, BrauerA, LambHF, PayneRL, TarasovPE, HaraguchiT, GotandaK, YonenobuH, YokoyamaY, NakagawaT, Suigetsu 2006 Project Members. 2013. Integration of the old and new Lake Suigetsu (Japan) terrestrial radiocarbon calibration data sets. Radiocarbon 55(4), this issue.
StuiverM, BraziunasTF. 1993. Modeling atmospheric 14C influences and 14C ages of marine samples to 10,000 BC. Radiocarbon 35(1):137–89.
StuiverM, SuessHE. 1966. On the relationship between radiocarbon dates and true sample ages. Radiocarbon 8:534–40.
SvenssonA, AndersenKK, BiglerM, ClausenHB, Dahl-JensenD, DaviesSM, JohnsenSJ, MuschelerR, ParreninF, RasmussenSO, RöthlisbergerR, SeierstadI, SteffensenJP, VintherBM. 2008. A 60 000 year Greenland stratigraphic ice core chronology. Climate of the Past 4:4757.
TaylorRE, SouthonJ. 2013. Reviewing the Mid-First Millennium BC 14C “warp” using 14C/bristlecone pine data. Nuclear Instruments and Methods in Physics Research B 294:440–3.
UsoskinIG, KromerB, LudlowF, BeerJ, FriedrichM, KovaltsovGA, SolankiSK, WackerL. 2013. The AD775 cosmic event revisited: the Sun is to blame. Astronomy and Astrophysics 552: L3.
van der PlichtJ, JansmaE, KarsH. 1995. The “Amsterdam Castle”: a case study of wiggle matching and the proper calibration curve. Radiocarbon 37(3):965–8.
van der PlichtJ, BeckJW, BardE, BaillieMGL, BlackwellPG, BuckCE, FriedrichM, GuildersonTP, HughenKA, KromerB, McCormacFG, Bronk RamseyC, ReimerPJ, ReimerRW, RemmeleS, RichardsDA, SouthonJR, StuiverM, WeyhenmeyerCE. 2004. NotCal04—comparison/calibration 14C records 26–50 cal kyr BP. Radiocarbon 46(3):1225–38.
van der PlichtJ, ImamuraM, SakamotoM. 2012. Dating of Late Pleistocene tree-ring series from Japan. Radiocarbon 54(3–4):625–33.
VoelkerAHL, GrootesPM, NadeauM-J, SarntheinM. 2000. Radiocarbon levels in the Iceland Sea from 25–53 kyr and their link to the Earth's magnetic field intensity. Radiocarbon 42(3):437–52.
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