In geochemistry, paleoclimatology and paleoceanography δ18O or delta-O-18 is a measure of the deviation in ratio of stable isotopes oxygen-18 (18O) and...

indicator of past climate is the fractionation of oxygen isotopes, denoted δ18O. This fractionation is controlled mainly by the amount of water locked up...

oceans at any one time, δ18O and δ13C preserved in the fossil record can be affected by regional factors. Carboniferous δ18O and δ13C records show regional...

advantage that the 18O ratio in water is not necessary (different from the δ18O approach), but for precise paleotemperature estimation, it also needs very...

all. Heinrich events are often marked by the following changes: Increased δ18O of the northern (Nordic) seas and East Asian stalactites (speleothems), which...

relationships, such as the tree ring or TEX86 methods. Isotope methods, such as the δ18O method or the clumped-isotope method, are able to provide, at least in theory...

Gilles; Huber, Brian T.; Kriwet, Juergen (1 February 2007). "Fish tooth δ18O revising Late Cretaceous meridional upper ocean water temperature gradients"...

approximately 6 °C in the North Atlantic. The drop in benthic foraminiferal δ18O values was most noticeable in the waters around Antarctica, suggesting cooling...

to coral strontium/calcium and δ18O variations. To confirm the accuracy of the annual relationship between Sr/Ca and δ18O variations, a perceptible association...

δ18O – a proxy for temperature – over the past 65 million years. The Azolla event marks the end of the Eocene optimum and the beginning of a long-term...