L18_Paleoclimate-Recent-Time

989 00115 trace radioacve isotopes in water h2o

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Unformatted text preview: =me- resolved records Ice Cores Sediment Cores Stable isotopes can help tease informa=on from these kinds of records Greenland, Antarc=c ice sheets are ~3 kilometers thick (~2 miles thick). The oldest ice at the boaom can be several hundreds of thousands of years old! Isotopes in water H2O Hydrogen Isotopes Isotope # protons 1H 1 2H (deuterium “D”) 1 3H (tri=um “T”) 1 # neutrons 0 1 2 atomic mass 1 2 3 abundance 99.989% 0.0115% trace (radioac=ve) Isotopes in water H2O Hydrogen Isotopes Isotope # protons 1H 1 2H (deuterium “D”) 1 3H (tri=um “T”) 1 Oxygen Isotopes 16O 8 17O 8 18O 8 # neutrons 0 1 2 atomic mass 1...
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