Abstract
ATMOSPHERIC trace gases can be used in the study of many worldwide problems. Increasing levels of atmospheric carbon dioxide have been suggested as a cause of ground level global warming through the “greenhouse” effect1. Variations in total ozone, to a large extent, control the ultraviolet radiation Received at ground level2. Certain inert gases such as radon3, Argon-37 (ref. 4) and Freon-11 (ref. 4) have been suggested as tracers of large scale atmospheric motions and diffusion rates. The worldwide distributions of carbon monoxide can shed light on the relative contribution of man-made and natural sources of that gas. Air-sea interaction including evaporation rates in hurricanes can be deduced from tritiated water vapour5 and radon6, for example.
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