SHCal20 Southern Hemisphere Calibration, 0–55,000 Years cal BP

ABSTRACT Early researchers of radiocarbon levels in Southern Hemisphere tree rings identified a variable North-South hemispheric offset, necessitating construction of a separate radiocarbon calibration curve for the South. We present here SHCal20, a revised calibration curve from 0–55,000 cal BP, based upon SHCal13 and fortified by the addition of 14 new tree-ring data sets in the 2140–0, 3520–3453, 3608–3590 and 13,140–11,375 cal BP time intervals. We detail the statistical approaches used for curve construction and present recommendations for the use of the Northern Hemisphere curve (IntCal20), the Southern Hemisphere curve (SHCal20) and suggest where application of an equal mixture of the curves might be…

• LT
  Leverhulme Trust

  Award: RF-2019-140\9
• SR
  Sight Research UK

  Awards: NE/H007865/1, NRCF010002, NE/S011854/1
• NE
  Natural Environment Research Council

  Awards: NRCF010002, NE/H007865/1, NE/S011854/1