(Sarah of the Clue Crew reports from a beach UC San Diego's Scripps Institution of Oceanography.)  In 1958, Scripps scientist Charles Keeling began using flasks to measure this gas in the atmosphere; the "Keeling curve" is a symbol of climate change
... Charles David Keeling, of Scripps 
Institution of Oceanography at UC San... [DOC] [TLE] Charles David Keeling Biography | Scripps CO2 Program [PAR] Charles David Keeling was affiliated with Scripps Institution of Oceanography, 
University of California, San Diego, from 1956 until his death in 2005.