Abstract
The exhalation of geochemical entities from soil to air is significant to understand Lithosphere-Atmospheric relationships. Some of these geochemical entities are capable of modifying the lower atmosphere, and they are employed in various studies. Radon is one of the geochemical gasses widely recognized as a dominant ionization source in near ground regions of the troposphere. The steady state Rn transport equation is considered in many cases for estimating Rn migration from soil to air on the condition that the time evolution is ignored. A method is proposed for estimating radon space-time transport from soil to air. This is achieved by solving the radon transport equation in soil with special boundary conditions. Similar results are obtained with some experimented models, as well as reported radon values in literature for some set of parameter combinations. Strengths and limitations of the method are discussed. The model is useable to study Lithosphere-Atmosphere relationships. It can also be significant in other studies like the Global Electric Circuit or Seismo-Ionospheric studies.
Highlights
Radon is one of the natural gasses constantly exhaled into the atmosphere from the soil.into the atmosphere or buildings without reacting with any atom in the process
Soil and water Rn anomalies are well known in earthquake precursory studies (Ali et al, 2019), its concentration can increase (Erees et al, 2007) or decrease (Omori et al, 2007) in relation to seismic activities. It is used as atmospheric tracer in the study of atmospheric transport processes, selection of least-perturbed marine air masses for baseline studies, tracing of terrestrial air mass movements, including the refinement of source footprints for aerosols in continental outflow events, calibration of regionally integrated emissions of important greenhouse gases, electric field studies, understanding pollutant concentrations behavior, and quantification of vertical mixing in the lower atmosphere (Williams et al, 2011)
The recorded radon concentration at monitoring depth may generate radon impulse exported from neighboring or far regions added to the radon production in the vicinity of the monitoring device
Summary
Radon is one of the natural gasses constantly exhaled into the atmosphere from the soil. A novel method is proposed for estimation of surface radon concentration using recorded soil radon data at a given depth. The recorded radon concentration at monitoring depth may generate radon impulse exported from neighboring or far regions added to the radon production in the vicinity of the monitoring device The study of these relationships is significant in the establishment of soil radon migration relation, and can be used to explain its transport from the production point to the atmosphere. It can be expressed as a function or a model, which represents the radon time series variation at any given time t at the radon monitoring depth z , where a is the attenuation coefficient It represents the fraction of radon concentration lost in its journey to the crustal surface. The last parameter a can be determined in similar way
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
