OxCal > Calibration Curves
Calibration Curves
The main curves recommended for calibration are:
- IntCal series
- Bomb series (Hua et al. 2013)
- Bomb13NH1: North of 40¡N; note this is prepended with the last 300 years of IntCal13
- Bomb13NH2: Between 40¡N and mean summer intertropical convergence zone; note this is prepended with the last 300 years of IntCal13
- Bomb13NH3: Northern hemisphere mean summer intertropical convergence zone; note this is prepended with the last 300 years of IntCal13
- Bomb13SH12: Southern hemisphere (not in mean summer intertropical convergence zone); note this is prepended with the last 300 years of SHCal13
- Bomb13SH3: Southern hemisphere mean summer intertropical convergence zone; note this is prepended with the last 300 years of SHCal13
- Kueppers04: Bomb series based on growth season (Kueppers et al. 2004)
For comparison with older calibrations the following are also included:
- IntCal09: Northern Hemisphere (Reimer et al. 2009)
- IntCal04: Northern Hemisphere (Reimer et al. 2004)
- IntCal98 (Stuiver et al. 1998)
- SHCal04: Southern Hemisphere (McCormac et al. 2004)
- Bomb04NH1: North of 40¡N; note this is prepended with the last 300 years of IntCal04
- Bomb04NH2: Between 40¡N and mean summer intertropical convergence zone; note this is prepended with the last 300 years of IntCal04
- Bomb04NH3: Northern hemisphere mean summer intertropical convergence zone; note this is prepended with the last 300 years of IntCal04
- Bomb04SH: Southern hemisphere; note this is prepended with the last 300 years of SHCal04
For post-bomb results the function R_F14C() should be used which uses results in the form of F14C as defined by Reimer et al. 2004. As a default OxCal works on a resolution of 0.2yr with such data. To obtain results similar to those for the non-smoothed curve in CALIBomb (Reimer et al. 2004), you should set the resolution to 0.01. For many purposes you should consider adding a Reservoir time constant in this time period as even short-lived plants grow over several months.
The recommended marine curve is:
For marine calibrations you will need to find an appropriate ΔR offset from the CHRONO Marine Reservoir Database.
For comparison with older calibrations the following are also included: