Stable oxygen and carbon isotope ratios of speleothem WB-21-5-A

The dataset includes speleothem carbon isotopes and oxygen isotopes used to reconstruct climate in southeastern Alaska during the past ~3,500 years. Speleothem WB-21-5-A was collected in Wishbone Cave (55.774 N, -133.191 E; 420 m.a.s.l.) on May 21, 2022. The data collection was completed between September 2021-March 2022. Stable isotopes were measured on a ThermoFisher Delta V isotope ratio mass spectrometer.