Equivalent Mixing Height and 222Rn

摘要

This paper deals with the so-called quantity “equivalent mixing height” (h), closely related to the dynamic state of the ground and boundary layer of the atmosphere, where convective flows of substances are present. Based on the theory of fluid mechanics, equations describing h are derived. Quantitative relations between 222Rn volume activity, h and eddy diffusion coefficient are described. A possibility of using h for assessing the atmospheric stability is explored.