oxygen isotope ratio (δ<sup>18</sup>O)
Climate Change
an expression for the ratio of the two isotopes 18O to 16O in a sample relative to a standard, defined as: δ18O= (18O/16Osample - 18O/16Ostandard)/ 18O/16Ostandard
an expression for the ratio of the two isotopes 18O to 16O in a sample relative to a standard, defined as: δ18O= (18O/16Osample - 18O/16Ostandard)/ 18O/16Ostandard