Journal ArticleDOI
Sources of Polonium 210 within the troposphere
Alain Marenco,Jacques Fontan +1 more
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In this article, it is concluded that tropospheric 210 Po is of natural origin and derived essentially from the decay of the 210 Pb present in the atmosphere. But this is only a short-time measurement.Abstract:
Contemporary technical literature has given consideration to complementary sources of 210 Po (fossil, terrestrial, stratospheric, artificial). A discussion of the importance of these various sources, based on short-time measurements of 210 Po, of 210 Pb, of long-lived nuclides and of products representative of pollution, carried out in S-W France, is given herein. It is concluded that tropospheric 210 Po is of natural origin and derived essentially from the decay of the 210 Pb present in the atmosphere. DOI: 10.1111/j.2153-3490.1972.tb01531.xread more
Citations
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Rainout lifetimes of highly soluble aerosols and gases as inferred from simulations with a general circulation model
TL;DR: In this paper, rainout-determined lifetimes of highly soluble particulate and gaseous atmospheric compounds are investigated using general circulation model simulations in which removal is explicitly calculated in terms of the local, model-produced precipitation rates.
Journal ArticleDOI
The atmospheric aerosol system: An overview
Joseph M. Prospero,Robert J. Charlson,V. A. Mohnen,Ruprecht Jaenicke,A. C. Delany,J. Moyers,W. Zoller,K. Rahn +7 more
TL;DR: In this paper, the authors discuss recent work on atmospheric aerosols that illustrates the complex nature of the aerosol chemical and physical system and suggest strategies for future research, and conclude that man has had a great impact on the global budgets of certain species, especially sulfur and nitrogen, that play a dominant role in the atmospheric aerosol system.
Journal ArticleDOI
Lead 210, bismuth 210, and polonium 210 in the atmosphere: Accurate ratio measurement and application to aerosol residence time determination
TL;DR: In this paper, the authors developed a procedure for the sequential separation and radiochemical analysis of 210Pb, 210Bi, 210Po, and 90Sr, and showed that the simple steady-state model does not apply to these long-lived radon daughters and that published residence time estimates based on 210Po/210Pb ratios are incorrect and too long.
Journal ArticleDOI
222Rn, 210Pb, 210Bi, and 210Po profiles and aerosol residence times versus altitude
TL;DR: In this paper, the results of measurements of 222Rn, 210Pb, 210Bi, 210Po, and 90Sr concentrations in air at various altitudes up to 16 km over the continental United States are presented and discussed in relation to their sources and application as tracers for the estimation of the residence time of particles in the troposphere and lower stratosphere.
References
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Journal ArticleDOI
The vertical distribution of radon 222, radon 220 and their decay products in the atmosphere
W. Jacobi,K. André +1 more
TL;DR: In this paper, the vertical equilibrium distributions of Rn222, Rn220, and their decay products in a horizontally isotropic atmosphere are calculated from diffusion theory with the help of a digital computer.
Journal ArticleDOI
Use of Long-Lived Natural Radioactivity as an Atmospheric Tracer
W. M. Burton,N. G. Stewart +1 more
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Lead‐210 and polonium‐210 in the atmosphere
TL;DR: The concentration of Pb-210 has been measured at several altitudes in the atmosphere over the United Kingdom during 1958 as discussed by the authors, and the gradient into the lower stratosphere was less steep than observed by Burton & Stewart (1960) and conformed to the diffusion models of Jacobi & Andre (1963) for the case of short washout times, and Machta (1960).
Journal ArticleDOI
Natural radioactivity in the atmosphere
TL;DR: In this paper, the authors measured the short-lived activities of cosmic-ray-produced radioisotopes P/sup 32, P/ sup 33, and Be/sup 7/ and Pb/sup 210/ in samples of dust filtered from stratospheric and tropospheric air.