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Question
Which of the following accurately describes 18O/16O ratios of ice sheets?A) During warmer periods, 18O evaporates more readily and therefore the 18O/16O ratio is higher.
B) The higher the ratio of ice core 18O/16O, the cooler there temperatures because the 18O will be locked up in ice sheets.
C) During periods of colder temperature, the 18O/16O ratio is higher because only the 18O isotope is being evaporated.
D) During warmer periods, 16O evaporates more readily and therefore the 18O/16O ratio is significantly lower than colder periods.
Answer
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