Sentences with phrase «measuring noble gas»
New insights into the glaciation cycles that occurred on Earth long before humans began affecting the temperature of the atmosphere and oceans are now possible using the technique of measuring noble gas quantities.
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For example, they want to measure the planet's inventory of stable noble gases, such as xenon and krypton, which change little in abundance over billions of years and hold clues to planetary origins.
Only with this experimental set - up is it possible to measure the tiny forces between microscope tip and noble gas atom, as a pure metal surface would allow the noble gas atoms to slide around.
By measuring the abundance of an isotope of the noble gas argon in the rock or its crystals, Gazel and his colleague Michael Kunk of the U.S. Geological Survey found that the magma was much younger than the last known volcanic event on the East Coast — which occurred when the supercontinent of Pangaea slowly pulled apart into North America, Africa and South America some 200 million years ago, forming the Atlantic Ocean in the process.
Greg Holland, a postdoctoral researcher in isotope geochemistry at the University of Manchester in England, and his colleagues measured the amounts of various isotopes of noble gases in the Bravo Dome gas field in New Mexico, where magmatic gases — primarily carbon dioxide — that allow the mantle to be sampled are buried hundreds of meters below.
Using mass spectroscopy, they measured the full suite of noble gases, with an emphasis on helium, neon and argon.
Researchers at the University of California, San Diego decided on a different model — they measured the ratio of noble gases in the atmosphere, which are in direct relation to the ocean's temperature.
Severinghaus measured values of the noble gases argon, krypton, and xenon in air bubbles captured inside ice cores in Antarctica.