Long term trend of CO, in the Northern Hemisphere 1000 800 600 tree rings - Verm

Question

Long term trend of CO, in the Northern Hemisphere 1000 800 600 tree rings - Vermunt -_ Jungfraujoch 400 period of the strongest bomb tests Carbon Oyple Group 200 Instnun tor Umweltphysk, Univ Heidelbe 1950 1960 1970 1980 1990 2000 2010 Year natural reference level In the 1950s and 1960s, a ser es of atomic bomb tests added large amounts of Carbon-14 to the atmosphere. The figure above shows the change in he ?14 concentration in the atmosphere over the 1965 corresponds to the accumulation from atomic bomb tests. Remember: A14C is basically (14c2c). Due to cadioac vede a a one how much would the atmospheric ?14C have decreased since 1965 i e in the last 53 years ? Given: half-life of Carbon-14 is 5730 years st 50 years The spike you see around K 1%

Explanation / Answer

Now given half life of Carbon 14 is 5370 years. Thus in 5730 years the Carbon 14 would get half of its concentration and in just 53 years the carbon 14 concentration would decrease less than 1 %. Because the radioactive decay is exponential.

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