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Bomb pulse - Wikipedia

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The bomb pulse is the sudden increase of carbon-14 (14C) in Earth's atmosphere due to the hundreds of above-ground nuclear tests that started in 1945 and intensified after 1950 until 1963, when the Limited Test Ban Treaty was signed by the United States, the Soviet Union and the United Kingdom.[2] These blasts were followed by a doubling of the relative concentration of 14C in the atmosphere.[3] Measurements of 14C levels by mass spectrometers are most accurately made by comparison to another carbon isotope, often the common isotope 12C. The figure shows how the relative concentration of 14C in the atmosphere, of order only 1 part per 1012, changed following the first bomb test in 1945. The increase in atmospheric 12C since 1955 has reduced the relative concentration of 14C to pre-1955 values, even though the absolute 14C concentration remains elevated. 14C naturally develops in trace amounts in the atmosphere and can be detected in all living things. Carbon of all types is continually

Bomb pulse - Wikipedia Jump to content From Wikipedia, the free encyclopedia Sudden increase of carbon-14 in the Earth's atmosphere due to nuclear bomb tests Atmospheric 14 C, New Zealand and Austria. The New Zealand curve is representative for the Southern Hemisphere, the Austrian curve is representative for the Northern Hemisphere. Atmospheric nuclear tests almost doubled the concentration of 14 C in the Northern Hemisphere. [ 1 ] The bomb pulse is the sudden increase of carbon-14 ( 14 C) in Earth's atmosphere due to the hundreds of above-ground nuclear tests that started in 1945 and intensi

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