Other
Scientific paper
Aug 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.7291l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Aug. 20, 1984, p. 7291-7297. NOAA-supported research.
Other
83
Air Pollution, Atmospheric Composition, Pollution Transport, Radioactive Decay, Radon Isotopes, Troposphere, Alaska, Arizona, Butanes, Hydrocarbons, Planetary Boundary Layer, Propane, Statistical Analysis, Summer, U.S.S.R., United States
Scientific paper
Radon 222 is an inert gas whose loss is due only to radioactive decay with a half life of 3.83 days (5.51-day 'exponential' lifetime). It is a very useful tracer of continental air because only ground level continental sources are significant. Thus it is similar in several ways to many air pollutants (e.g., NOx (NO + NO2, SO2 and certain hydrocarbons). Previously published measured (222)Rn profiles are analyzed here by averaging for the summer, winter, and spring-fall seasons. The analysis shows that in summer, about 55 percent of the (222)Rn is transported above the planetary boundary layer, considerably more than during the other seasons. Similarly, in summer, about 20 percent rises to over 5.5 km (500 mbar). The average profiles have been used to derive vertical eddy diffusion coefficients with maximum values of 5 to 7 x 10 to the 5th sq cm/s in the midtroposphere and 8 x 10 to the 3rd to 5 x 10 to the 4th sq cm/s near the surface.
Cicerone Ralph J.
Liu Char-Shine
McAfee J. R.
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