Late Holocene inter-annual temperature variability reconstructed from the δ18O of archaeological Ostrea angasi shells
The oxygen isotope record in O. angasi reflects a combined temperature–salinity signal. Observations of δ18Oshell data from modern specimens are used as a point of reference to assist in decoupling these two influences, with the two archaeological samples compared with the δ18Oshell profile of four modern O. angasi. Assuming similar paleo- δ18Owater values at the collection sites, data from these archaeological shells present a record of temperatures during the period of their growth that are consistently lower than modern day, with mean annual temperatures ∼2°C cooler.
Document Type: Research Article
Affiliations: 1: Research School of Earth Sciences, The Australian National University, Canberra, ACT 2601, Australia 2: Department of Geological Sciences, University of Florida, Gainesville, FL, 32611, USA 3: College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, OR, 97330, USA
Publication date: August 18, 2017