Estimating the Asian radon flux density and its latitudinal gradient in winter using ground-based radon observations at Sado Island

dc.contributor.authorWilliams, AGen_AU
dc.contributor.authorChambers, SDen_AU
dc.contributor.authorZahorowski, Wen_AU
dc.contributor.authorCrawford, Jen_AU
dc.contributor.authorMatsumoto, Ken_AU
dc.contributor.authorUematsu, Men_AU
dc.date.accessioned2010-04-09T02:06:41Zen_AU
dc.date.accessioned2010-04-30T05:08:22Zen_AU
dc.date.available2010-04-09T02:06:41Zen_AU
dc.date.available2010-04-30T05:08:22Zen_AU
dc.date.issued2009-11en_AU
dc.date.statistics2009-11en_AU
dc.description.abstractTerrestrial radon-222 flux density for the Asian continent, integrated over distances of 4500 km, is estimated in two 20° latitudinal bands centred on 48.8°N and 63.2°N. The evaluation is based on three years of wintertime radon measurements at Sado Island, Japan, together with meteorological and trajectory information. A selection of 18% of observations are suitable for evaluation of an analytical expression for the continental surface flux. Various meteorological assumptions are discussed; it is found that there is a substantial effect of increased complexity of the formulation on the flux estimates obtained. The distribution of spatially integrated radon flux over the Asian landmass is reported for the first time. Expressed as geometric means and 1σ-ranges, estimated fluxes are 14.1 mBq m−2 s−1 (1σ-range: 18 mBq m−2 s−1) and 8.4 mBq m−2 s−1 (1σ-range: 10 mBq m−2 s−1) for the lower and higher latitude bands. These results constitute an annual minimum in flux densities for these regions, and are higher than previously reported. The existence of a latitudinal gradient in the continental radon source function is confirmed; the present estimate for Asia (−0.39 mBq m−2 s−1 per degree of latitude) is in agreement with the northern hemisphere terrestrial radon flux gradient proposed previously. © 2009, Wiley-Blackwell.en_AU
dc.identifier.citationWilliams, A. G., Chambers, S., Zahorowski, W., Crawford, J., Matsumoto, K., & Uematsu, M. (2009). Estimating the Asian radon flux density and its latitudinal gradient in winter using ground-based radon observations at Sado Island. Tellus B: Chemical and Physical Meteorology, 61(5), 732-746. doi:10.1111/j.1600-0889.2009.00438.xen_AU
dc.identifier.govdoc1538en_AU
dc.identifier.issn0280-6509en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleTellus B: Chemical and Physical Meteorologyen_AU
dc.identifier.pagination732-746en_AU
dc.identifier.urihttp://dx.doi.org/10.1111/j.1600-0889.2009.00438.xen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3136en_AU
dc.identifier.volume61en_AU
dc.language.isoenen_AU
dc.publisherWiley-Blackwellen_AU
dc.subjectAsiaen_AU
dc.subjectRadon 222en_AU
dc.subjectFlux densityen_AU
dc.subjectJapanen_AU
dc.subjectIslandsen_AU
dc.subjectMeteorologyen_AU
dc.titleEstimating the Asian radon flux density and its latitudinal gradient in winter using ground-based radon observations at Sado Islanden_AU
dc.typeJournal Articleen_AU
Files
License bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
1.79 KB
Format:
Plain Text
Description:
Collections