Sentences with phrase «isotopic data»
Isotopic data refers to information about the different forms of atoms, called isotopes, found in a sample or substance. It helps scientists understand the composition, origin, or processes related to that material. Full definition
The team presents new isotopic data showing that a burst of oxygen production by photosynthetic cyanobacteria temporarily increased oxygen concentrations in Earth's atmosphere.
sciencedaily.com
From what I can tell you really can not use isotopic data to determine this accurately at all.
Evidence from isotopic data on Early Holocene bison and other large herbivores in northern Europe.
The Nature paper reports high - precision potassium isotopic data for a representative sample of lunar and terrestrial rocks.
Species are listed in order of abundance, and isotopic data separate species by what they ate and their environment.
Rubidium is the second most reactive metal and is A minimum age for the premier kimberlite pipe yielded by biotite Rb Sr measurements, with related galena isotopic data ☆
In the subtropical Himalayas, there is evidence from ice - core isotopic data and from nearby stations for unusual 20th century warming [Thompson et al, 2003].
An extensive scientific literature exists on this topic, and I believe we are pretty good in the community at properly qualifying our statements to accord with the underlying scientific literature; the blogospheric misuses of the GISP2 isotopic data that I have seen are not doing so, and are making errors of interpretation as a result.
[Shaviv and Veizer, 2003] argue that the disagreement between the reconstructions reveals them to be in need of «validation ``, but ignore the large literature of paleosol, stomatal, and carbon and boron isotopic data, which support the Geocarb reconstruction [Royer et al, in press].
Through a combination with ice sheet and climate modeling, the isotopic data show that the waters around the Antarctic were heavily layered at the time of the melting events, so that the ice sheets melted at a faster rate.
Regarding the isotopic data mentioned above, where in the carbon cycle is carbon - 14 created (and how)?
The isotopic data evaluated above is derived from the fractionation of the naturally occuring stable isotopes of Carbon, 12 and 13.
The isotopic data (e.g. carbon and strontium) along with the various other proxy data and even the little ice age in the 1800's make it quite clear, that heat levels (absorbance, transfer, etc...) do change.
The timing and style of volcanism in the central Andes suggest that the mantle lithosphere fell away suddenly — as a huge drop dripping off the crust or as a layer peeling away — just when the isotopic data indicate a punctuated uplift, the group writes.