Sentences with phrase «oxygen isotope compositions of»
Here, we present a record of Holocene glacial ice discharge, derived from the oxygen isotope composition of marine diatoms from Palmer Deep along the west Antarctic Peninsula continental margin.
https://dotearth.blogs.nytimes.com/ Not exact matches
The composition of these ice cores, especially the presence of hydrogen and oxygen isotopes, provides a picture of the climate at the time.
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.
But more accurate measurements of oxygen isotopes published in 2016 only confirmed that the isotopic compositions are not distinguishable.
They also used satellite precipitation data to «backsolve» the brine's origins using sodium concentrations, oxygen and hydrogen isotopes, as the isotopic composition of water reflects the condensation temperature and precipitation rate over time.
The information about oxygen concentration comes from the isotopic composition of carbon or rather from the ratio between the stable carbon isotopes 12C and 13C.
Our proxies, including oxygen isotopes and annual ring widths (MAT = — 0.5 ± 1.9 °C), coexistence of paleovegetation (MAT = — 0.4 ± 4.1 °C), and bacterial tetraether composition in paleosols (MAT = — 0.6 ± 5.0 °C), yield estimates that are statistically indistinguishable.