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...

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...

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...

to 1,200 AD, during the MWP, the ISM was again strong as evidenced by low δ18O values from the Ganga Plain. The sediments of Lonar Lake in Maharashtra record...

δ18O Benthic foraminifera 0–7 Ma...

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...

more than doubling the atmospheric carbon dioxide concentration. A -2% δ18O excursion signifies the extreme magnitude of this climatic shift. This extremely...

has found support from the dating of 4.404 Gya zircon crystals with high δ18O values from metamorphosed quartzite of Mount Narryer in Western Australia...

such as 18O/16O and D/1H from water are displayed using delta notation – δ18O and δD, respectively The rate of depreciation of the aggregate capital stock...

kyr, 40 kyr, and 20 kyr. δ18O can also be used to investigate smaller scale climate phenomena. Koutavas et al. (2006) used δ18O of G. ruber foraminifera...

the IAEA-603 isotopic standard in mass spectrometry for the calibration of δ18O and δ13C. Calcite can be formed naturally or synthesized. However, artificial...

/\!_{00}} Where δ18O and δ2H (also known as δD) are the ratio of heavy to light isotopes (e.g. 18O/16O, 2H/1H). The relationship of δ18O and δ2H in meteoric...

the IAEA-603 isotopic standard in mass spectrometry for the calibration of δ18O and δ13C. Michelangelo's Pietà, St. Peter's Basilica, Vatican City Replica...

Cavosie; J.W. Valley; S.A. Wilde & E.I.M.F. (July 15, 2005). "Magmatic δ18O in 4400–3900 Ma detrital zircons: A record of the alteration and recycling...

measurements. An example of proxies is the use of diatom isotope records of δ13C, δ18O, δ30Si (δ13Cdiatom, δ18Odiatom, and δ30Sidiatom). In 2015, Swann and Snelling...

off Africa, but the cooling events appear to be larger: 3–8 °C (6–14 °F). δ18O values from chironomid remains in the Azores reflect the cooling of the LIA...

Wilde, S.A.; Edinburgh Ion Microprobe Facility (E.I.M.F.) (2005). "Magmatic δ18O in 4400–3900 Ma detrital zircons: A record of the alteration and recycling...

around the Last Interglacial derived from an annually resolved stalagmite δ18O record". Palaeogeography, Palaeoclimatology, Palaeoecology. 541: 109545....

the juvenile Achelousaurus specimen MOR 591. δ18O values of phosphate in vertebrate bones depend on the δ18O values in their body water and the temperature...

Hermann, Achim D.; Leslie, Stephen A. (15 January 2012). "Conodont apatite δ18O values from a platform margin setting, Oklahoma, USA: Implications for initiation...

Christopher R.; Männik, Peep; Simpson, Andrew (February 2016). "New conodont δ18O records of Silurian climate change: Implications for environmental and biological...

Manuel (April 2015). "Long-term cycles of Triassic climate change: a new δ18O record from conodont apatite". Earth and Planetary Science Letters. 415:...

paleotemperatures varies from study to study depending on the sample collected. δ18O measurements are most common when analyzing Ice core samples whereas the...

isotopes 13C:12C δ15N, a measure of the ratio of stable isotopes 15N:14N δ18O, a measure of the ratio of stable isotopes oxygen-18:oxygen-16 DeltaWing...