Observations and modelling of thoron and its progeny in the soil–atmosphere–plant system

Outdoor Radon Dose Rate in Canada’s Arctic amid Climate Change

“…Moreover, studies have shown that soil water content is the primary factor affecting their concentrations. 48 , 51 So the 212 Pb data also reflect changes in SAWC conditions within the topsoil layer of a few centimeters, where thoron primarily originates.…”

“…Gaseous radon and thoron ( 220 Rn from thorium decay series) in soil exhibit similar exhalation responses to environmental factors. , For instance, soil temperature positively affects their exhalation rates. ,− Additionally, their exhalation rates increase with rising soil water content up to a certain level, beyond which they gradually decrease with further increases in soil moisture. − Therefore, aerosol data of thoron’s progeny 212 Pb can be used to infer radon gas concentration variations in soil/atmosphere. Moreover, studies have shown that soil water content is the primary factor affecting their concentrations. , So the 212 Pb data also reflect changes in SAWC conditions within the topsoil layer of a few centimeters, where thoron primarily originates.…”

“…Gaseous radon and thoron ( 220 Rn from thorium decay series) in soil exhibit similar exhalation responses to environmental factors. 48 , 49 For instance, soil temperature positively affects their exhalation rates. 38 , 50 − 52 Additionally, their exhalation rates increase with rising soil water content up to a certain level, beyond which they gradually decrease with further increases in soil moisture.…”