Code for calculating the vertical distribution of radon isotopes and their progeny in the atmosphere
Description
Abstract A one-dimensional time-dependent eddy-transport model is developed for estimating the vertical distributions of ^(222)Rn, ^(220)Rn and their progeny, activity ratios of progeny to parent, unattached fraction and equilibrium factor in the Earth's lower atmosphere. The model takes into account radioactive decay, attachment to aerosol particles, recoil, dry deposition, rainout and washout processes. The turbulent diffusion equations are solved numerically using a backward time centred space ... Title of program: VERDI Catalogue Id: ADPB_v1_0 Nature of problem Radon (222Rn) and thoron (220Rn) are inert radioactive gases produced in the Earth's crust by decay of 226Ra and 224Ra, respectively. Transported through soil, these gases enter the atmosphere where they undergo meteorological processes. Their decay products react with trace gases and water vapors. These freshly formed clusters attach to existing aerosol particles. As a consequence of radioactive decay, a cluster may desorb from its host by recoil. All progeny, whether attached or not, are remov ... Versions of this program held in the CPC repository in Mendeley Data ADPB_v1_0; VERDI; 10.1016/S0010-4655(01)00299-5 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)