IntCal04


IntCal04 Supplemental Data
These files accompany the IntCal04: Calibration Issue of Radiocarbon (Volume 46, nr 3, 2004). Read the Table of Contents.
(Files are given with corresponding article title.) Updated 30 April 2007.



IntCal04 Terrestrial Radiocarbon Age Calibration, 0–26 cal kyr BP
Paula J Reimer, Mike G L Baillie, Edouard Bard, Alex Bayliss, J Warren Beck, Chanda J H Bertrand, Paul G Blackwell, Caitlin E Buck, George S Burr, Kirsten B Cutler, Paul E Damon, R Lawrence Edwards, Richard G Fairbanks, Michael Friedrich, Thomas P Guilderson, Alan G Hogg, Konrad A Hughen, Bernd Kromer, Gerry McCormac, Sturt Manning, Christopher Bronk Ramsey, Ron W Reimer, Sabine Remmele, John R Southon, Minze Stuiver, Sahra Talamo, F W Taylor, Johannes van der Plicht, Constanze E Weyhenmeyer


IntCal04 calibration curve with 1-standard deviation envelope and data with 1-standard deviation error bars in 14C and cal age. Lab codes for 14C measurements are given in parentheses. Individual data sets are given as Excel files in the links below.

Data sets are described and fully referenced in this document.

Dataset 1: University of Washington (QL) tree-ring
Dataset 2: Queen's University Belfast (UB) tree-ring
Dataset 3: University of Waikato (Wk) tree-ring
Dataset 4: University of Groningen (GrN) tree-ring
Dataset 5: Heidelberger Akademie der Wissenschaften (Hd) tree-ring
Dataset 6: CSIR, Pretoria (Pta) tree-ring
Dataset 7: Center for Accelerator Mass Spectrometry, LLNL (CAMS) tree-ring
Dataset 8-9: numbers not currently in use
Dataset 10: E. Bard et al. (Gif) Corals
Dataset 11: R.G. Fairbanks et al. (CAMS, Gif) Corals
Dataset 12: R. L. Edwards et al. (AA, WHOI) Corals
Dataset 13: G.S. Burr et al. (AA) Corals
Dataset 14: K. B. Cutler et al. (AA) Corals
Dataset 15: Hughen et al. (CAMS) Foraminifera

IntCal04.14c
IntCal04 Northern Hemisphere radiocarbon calibration curve
Format: cal BP, 14C BP, ± Error, Δ14C (‰), σ14C
Δ is age-corrected as per Stuiver and Polach (1977). Note that the curve spacing changes from 20 yr from 26,000 to 15,020 cal BP, 10 yr from 15,000 to 12,500 cal BP, and 5 yr from 12,495 to 0 cal BP.

IntCal04_rawdata.csv
(Some data are found in: Richard G. Fairbanks, Richard A. Mortlock, Tzu-Chien Chiu, Li Cao, Alexey Kaplan, Thomas P. Guilderson, Todd W. Fairbanks, Arthur L. Bloom, Pieter M. Grootes and Marie-Josée Nadeau. 2005. Radiocarbon calibration curve spanning 0 to 50,000 years BP based on paired 230Th/234U/238U and 14C dates on pristine corals. Quaternary Science Reviews 24(16-17):1781-1796.)

Figure S1.pdf
IntCal04 age-corrected Δ14C (‰) with a 2-standard deviation envelope showing the 1000- and 2000-yr moving averages (red and blue lines, respectively). For the old end of the data set, the moving average truncates the first 500 or 1000 yr. For the recent end, the moving average window was allowed to shrink to the number of remaining points in the data set to avoid this type of truncation.

Figure S2.pdf
IntCal04 Residual Δ14C (‰) with 1000-yr (blue) and 2000-yr (red) moving average subtracted from IntCal04 Δ14C.


Residual Δ14C

Two residual Δ14C files with moving averages subtracted from the IntCal04 Δ14C are included. The 1000-yr moving average follows the data set more closely and the residual left when subtracting this will have less red noise, but would remove millennial-scale cycles (Figure S1). The residual around the 2000-yr moving average is also given for comparison to longer-term cycles and to the 1998 residual Δ14C data set. The last 100 yr of the IntCal04 data set are not included in the moving average because of fossil fuel depletion.

Resid04_1000.14c
Format: cal BP, Residual Δ14C (‰), σ14C
Residual Δ14C = IntCal04 Δ14C (‰) – 1000-yr moving average
The 1000-yr moving average is weighted by 1/(σ 14C)2. From 1005–105 cal BP, the moving average window is allowed to shrink to the number of remaining points in the data set. The residual is linearly interpolated to the same spacing as IntCal04. The uncertainty is from the IntCal04 Δ14C only.

Resid04_2000.14c
Format: cal BP, Residual Δ14C (‰), σ14C
Residual Δ14C = IntCal04 Δ14C (‰) – 2000-yr moving average
Residual Δ14C is calculated from IntCal04 Δ14C (‰) with a 2000-yr moving average subtracted. The 2000-yr moving average is weighted by 1 / (σ14C)2. From 2105 – 105 cal BP, the moving average window is allowed to shrink to the number of remaining points in the data set. The residual is linearly interpolated to the same spacing as IntCal04. Note that the residual Δ14C in IntCal98 (Figure 14 of Stuiver et al. 1998) was calculated from Δ14C minus a smoothing spline which approximated a 2000-yr moving average. The uncertainty is from IntCal04 Δ14C only.

Marine04 Marine Radiocarbon Age Calibration, 0–26 cal kyr BP
Konrad A Hughen, Mike G L Baillie, Edouard Bard, J Warren Beck, Chanda J H Bertrand, Paul G Blackwell, Caitlin E Buck, George S Burr, Kirsten B Cutler, Paul E Damon, Richard L Edwards, Richard G Fairbanks, Michael Friedrich, Thomas P Guilderson, Bernd Kromer, Gerry McCormac, Sturt Manning, Christopher Bronk Ramsey, Paula J Reimer, Ron W Reimer, Sabine Remmele, John R Southon, Minze Stuiver, Sahra Talamo, F W Taylor, Johannes van der Plicht, Constanze E Weyhenmeyer

Marine04.14c
Marine04 global marine radiocarbon calibration curve
Format: cal BP, 14C BP, ± Error, Δ14C (‰), σ14C
Δ is age-corrected as per Stuiver and Polach (1977). Note that the curve spacing changes from 20 yr from 26,000 to 15,020 cal BP, 10 yr from 15,000 to 12,500 cal BP, and 5 yr from 12,495 to 0 cal BP.

SHCal04 Southern Hemisphere Calibration, 0–11.0 cal kyr BP
Gerry McCormac, Alan G Hogg, Paul G Blackwell, Caitlin E Buck, Thomas F G Higham, Paula J Reimer

SHCal04.14c
SHCal04 Southern Hemisphere atmospheric radiocarbon calibration curve
Format: cal BP, 14C BP, ± Error, Δ14C (‰), σ14C
Δ is age-corrected as per Stuiver and Polach (1977).

Data sets (Word)
Raw data (.csv)

Radiocarbon Calibration in the Anglo-Saxon Period: AD 495–725
Gerry McCormac, Alex Bayliss, Mike G L Baillie, D M Brown

Table 1 (Excel, pdf)

Late Glacial 14C Ages from a Floating, 1382-Ring Pine Chronology
Bernd Kromer, Michael Friedrich, Konrad A Hughen, Felix Kaiser, Sabine Remmele, Matthias Schaub, Sahra Talamo

Table 1--Late Glacial decadal data (txt)

The Tropospheric 14CO2 Level in Mid-Latitudes of the Northern Hemisphere (1959–2003)
Ingeborg Levin, Bernd Kromer

Individual records (Excel), Tables 1 and 2 revised April 7, 2005

Review of Tropospheric Bomb 14C Data for Carbon Cycle Modeling and Age Calibration Purposes
Quan Hua, Mike Barbetti

Table 8 (Word, pdf)


References

Stuiver M, Polach HA. 1977. Discussion: reporting of 14C data. Radiocarbon 19(3):355–63.
Stuiver M, Reimer PJ, Bard E, Beck JW, Burr GS, Hughen KA, Kromer B, McCormac G, van der Plicht J, Spurk M. 1998. IntCal98 radiocarbon age calibration, 24,000–0 cal BP. Radiocarbon 40(3):1041–83.