Sentences with phrase «oxygen isotope values»

Oxygen isotope values for forams in the ocean relate primarily to both temperature and ice volume (and involve species - dependent vital effects), and salinity relationships and it's not a trivial issue to disentangle these.

(I think some of Lonnie Thompson's work on interpreting low - latitude oxygen isotope values as temperature signals in ice cores led to some issues).

(I think some of Lonnie Thompson's work on interpreting low - latitude oxygen isotope values as temperature signals in ice cores led to some issues).

Not exact matches

The ratio of oxygen isotopes in seawater depends on the water temperature; the value of this ratio at any point in evolutionary time is «frozen» into the chemical composition of certain marine fossils.

This paper gives results from a stable oxygen isotope assessment of modern human and horse enamel δ18O values recovered from tooth enamel.

First, I do think that there is a lot of work to be done in the interpretation of oxygen / hydrogen isotope values obtained at a site, and there's still plenty of disagreement in the paleo - community on how to best connect the isotopic signal in a record with climate.

The record tells the story of the sudden release of an isotopically light source of carbon, triggering a fast warming in the deep sea of about 5 degrees C. Both the carbon isotope signal and the temperature (inferred from oxygen isotopes) then relaxed back toward their initial values in about 100,000 years.

First, I do think that there is a lot of work to be done in the interpretation of oxygen / hydrogen isotope values obtained at a site, and there's still plenty of disagreement in the paleo - community on how to best connect the isotopic signal in a record with climate.

The group highlighted the added value of measuring paired coral strontium / calcium ratios (Sr / Ca) and oxygen isotope ratios (δ18O), two key proxies for sea surface temperature that are often referred to as paleothermometers (δ18O also reflects sea surface salinity).

Preliminary results of oxygen isotope analysis of tree rings suggests anomalously low values during the 11th Century, perhaps indicating large - scale changes in circulation.

Stable isotope ratios of oxygen reflect water temperatures, with higher δ18O values indicating colder water [6], [9], [12], such as water upwelled from lower depths.

Using oxygen isotopes, the scientists reconstructed the moisture development at these locations, whereby the corresponding delta - 18O - values reflected monsoon intensity.