... half the planet's mass. Of its three stable isotopes, oxygen 16 makes up 99.762 ... carbonaceous chondrites, have quite different ratios of oxygen isotopes than on Earth; presumably the rare heavy ...
... analysis, an important tool used in climate reconstruction.
The scientists found the broadest range of oxygen isotopic variation ever reported from marine sediments, which they attribute to melting ...
... and a German government body, came to their conclusions after analysing the strontium, carbon and oxygen isotopes signatures of the skeletons' teeth. These give vital information about the skeletons' ...
... that tree leaf temperatures were equal to ambient temperatures.
Researchers at Penn, using measures of oxygen isotopes and current climate, determined a way to estimate leaf temperature in living ...
... Magnetic Field Laboratory, analysis of carbon and oxygen isotopes in the fossils revealed the animals' diet ... Yang co-authored the paper ("Stable isotopes in fossil mammals, fish and shells from Kunlun ...
... , and tells about the temperature where the atmospheric precipitation is formed. The higher the content of the oxygen-isotope O-18, the warmer is the climate locally in the place of atmospheric ...
... dating showed that the record in fact went back to the early 1960s. Combination of oxygen isotope ratio determinations with those of hydrogen was then used to estimate the precipitations that feed ...
... from ship smoke from the tailpipe emissions of trucks, cars and other sources. This was done using an oxygen-isotope technique developed by Thiemens that allows scientists to determine the signature ...
... by Ohio University geologist Gregory Springer examined the trace metal strontium and carbon and oxygen isotopes in the stalagmite, which preserved climate conditions averaged over periods as brief as ...
... the anomaly: the idea that light from the early Sun could have shifted the balance of oxygen isotopes in molecules that formed after it turned on. When they beamed light through carbon monoxide gas ...
... Wisc-SIMS) laboratory, the most advanced instrument of its kind in the world.
To their surprise, they found oxygen isotope ratios in the comet crystals that are similar to asteroids and even the sun ...
... individuals from different nurseries," said Rooker. "Chemical signatures in the form of stable carbon and oxygen isotope ratios served as a 'birth certificate' and we used these natural tags to ...
... ring widths, we're looking at the geochemical composition of each ring," says Orland.
Using oxygen isotope signatures and impurities — such as organic matter flushed into the cave by surface rain — ...
... Institute (PSI) in 2001 has now provided new findings in climate research. Oxygen isotopes in the ice were used to reconstruct the temperatures in the Altai over the past 750 years. The scientists ...
... 4.52 billion years old and that they formed during the birth of the Solar System. Combined with the oxygen isotope data, this age points to their origin from an asteroid rather than a planet," he ...
