A tibble containing the IntCal20 Northern Hemisphere atmospheric radiocarbon calibration curve.
intcal20
An object of class tbl_df (inherits from tbl, data.frame) with 9500 rows and 5 columns.
http://intcal.org/curves/intcal20.14c
intcal20 is a tibble::tbl_df object with the following fields:
CAL BP --- The calibrated year before present
14C age --- The un-calibrated 14C age of the sample, in years before present
Error --- The measurement error of the 14C age, in years before present
Delta 14C --- The normalized delta 14C (Δ14C) measurement for the sample, in per mil (‰)
Sigma --- The standard deviation (σ) of the Δ14C measurement, in per mil (‰)
Reimer, P. J., Austin, W. E. N., Bard, E., Bayliss, A., Blackwell, P. G., Bronk Ramsey, C., Butzin, M., Cheng, H., Edwards, R. L., Friedrich, M., Grootes, P. M., Guilderson, T. P., Hajdas, I., Heaton, T. J., Hogg, A. G., Hughen, K. A., Kromer, B., Manning, S. W., Muscheler, R., Palmer, J. G., Pearson, C., van der Plicht, J., Reimer, R. W., Richards, D. A., Scott, E. M., Southon, J. R., Turney, C. S. M., Wacker, L., Adolphi, F., Büntgen, U., Capano, M., Fahrni, S. M., Fogtmann-Schulz, A., Friedrich, R., Köhler, P., Kudsk, S., Miyake, F., Olsen, J., Reinig, F., Sakamoto, M., Sookdeo, A. and Talamo, S. (2020) “THE INTCAL20 NORTHERN HEMISPHERE RADIOCARBON AGE CALIBRATION CURVE (0–55 CAL kBP),” Radiocarbon. Cambridge University Press, pp. 1–33. DOI: 10.1017/RDC.2020.41