He proved that CO2 was a key
driver of the greenhouse effect.
(1921?-2004) A pioneer in upper-atmosphere satellite spectroscopy who studied the absorption bands of CO2 and water vapour. Up to that time, it was believed that the effects of increased CO2 in the atmosphere would be overshadowed by the competing effect of water vapour.
He showed that the absorption bands of water and CO2 did not overlap, which meant that increases in CO2 would generate an additional greenhouse effect separate from that caused by water vapour.
1. Click here to read a 1956 New York Times' report on Plass's work.
2. Click here to read Gavin Schmidt of Real Climate on The carbon dioxide theory of Gilbert Plass.