A map of radon flux at the Australian land surface Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC, NSW, 2232, Australia
Received: 27 April 2010 – Published in Atmos. Chem. Phys. Discuss.: 09 June 2010 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.
Revised: 09 September 2010 – Accepted: 10 September 2010 – Published: 27 September 2010
Citation: Griffiths, A. D., Zahorowski, W., Element, A., and Werczynski, S.: A map of radon flux at the Australian land surface, Atmos. Chem. Phys., 10, 8969-8982, doi:10.5194/acp-10-8969-2010, 2010.