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Marine Carbon Biogeochemistry : A Primer for Earth System Scientists (SpringerBriefs in Earth System Sciences)
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the three isotopes of hydrogen, only one, tritium, is radioactive—it decays into a stable isotope of helium.
Warren Goldstein • For the Love of Physics: From the End of the Rainbow to the Edge of Time—A Journey Through the Wonders of Physics
The isotope technique, it was now clear, gave you, in effect, a measure of the global average temperature, no matter where in the oceans the core had been drilled. But they still needed a way to date accurately the temperature fluctuations that were now clearly apparent in the cores covering the entire Pleistocene Epoch.
Mary Gribbin • Ice Age
the three isotopes of hydrogen, only one, tritium, is radioactive—it decays into a stable isotope of helium.
Warren Goldstein • For the Love of Physics: From the End of the Rainbow to the Edge of Time—A Journey Through the Wonders of Physics
The obvious candidate for that something else was the way water gets locked up in great ice sheets during an Ice Age. When water evaporates, it is easier for the lighter molecules to escape into the air, so the water left behind tends to have a higher proportion of oxygen-18; much of the evaporated water, relatively rich in oxygen-16 compared with
... See moreMary Gribbin • Ice Age
Since the temperature at the bottom of the sea hardly changes, even during the switch from an Ice Age to an Interglacial, this was the definitive proof that the main influence on the oxygen isotope composition was indeed the advance and retreat of the ice sheets on land, and that the isotopes were recording the pulsebeat of global climate change.
Mary Gribbin • Ice Age
