July 2004
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A rising level of CO2 in the atmosphere
was first demonstrated in 1960 in Antarctica, visible after only two years
of measurements. Upper: Keeling's graph. Lower: the Little America Navy
base shortly after it was established in 1956.
![](images/keeling60.jpg)
C. D. Keeling, Tellus 12, (1960),
p. 200, reproduced by permission.
Little America. Watercolor & pencil sketch by Robert Charles Haun,
January 1956.
Courtesy Dept. of the Navy, Naval Historical Center, 88-192-BF
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