A map of radon flux at the Australian land surface
Alan D. GriffithsAustralian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW, 2232, AustraliaW. ZahorowskiAustralian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW, 2232, AustraliaA. ElementAustralian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW, 2232, AustraliaSylvester WerczynskiAustralian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW, 2232, Australia
2010en
ABI
Abstract
Abstract. A time-dependent map of radon-222 flux density at the Australian land surface has been constructed with a spatial resolution of 0.05° and temporal resolution of one month. Radon flux density was calculated from a simple model utilising data from national gamma-ray aerial surveys; modelled soil moisture, available from 1900 in near real-time; and maps of soil properties. The model was calibrated against a data set of accumulation chamber measurements, thereby constraining it with experimental data. A notable application of the map is in atmospheric mixing and transport studies which use radon as a tracer, where it is a clear improvement on the common assumption of uniform radon flux density.
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