Continuous measurements of outdoor radon concentrations at various locations in East Asia

Iida, Takao; Ikebe, Yukimasa; Suzuki, Kunihiro; Ueno, K.; Wang, Z.; Jin, Yihe

doi:10.1016/s0160-4120(96)00102-x

Cited by 61 publications

(34 citation statements)

References 11 publications

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“…Previous detectors relied upon the use of radon progeny as a radon proxy, a technique that necessitates concomitant assumptions regarding equilibrium, or establishing the degree of disequilibrium, of the progeny with respect to the ambient radon (Lambert et al, 1970;Larson, 1973;Wilkniss et al, 1973). The sophistication of detectors for direct radon monitoring rapidly increased (Whittlestone and Zahorowski, 1995;Iida et al, 1996;Whittlestone and Zahorowski, 1998), such that their lower limit of detection was suitable for monitoring radon concentration in marine air, and their response time was suitable for observing synoptic scale events.…”

Section: Historical Background: Radon Monitoring and Applicationmentioning

confidence: 99%

Ground based radon-222 observations and their application to atmospheric studies

Zahorowski

Chambers

Henderson‐Sellers

2004

Journal of Environmental Radioactivity

133

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Section: Historical Background: Radon Monitoring and Applicationmentioning

confidence: 99%

Ground based radon-222 observations and their application to atmospheric studies

Zahorowski

Chambers

Henderson‐Sellers

2004

Journal of Environmental Radioactivity

133

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“…Also the two-filter detector we used, is not the only instrument measuring atmospheric 222 Rn instead of atmospheric 222 Rn progeny. Other instruments include those based on the design by Iida et al (1996) and widely used in East Asia (e.g. Moriizumi et al, 2008), and the two filter detector developed by the Environmental Measurements Laboratory (EML) as described in Collé et al (1996).…”

mentioning

confidence: 99%

Comparison of one- and two-filter detectors for atmospheric <sup>222</sup>Rn measurements under various meteorological conditions

et al. 2010

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Abstract. Parallel monitoring of 222 Rn and its short-lived progeny ( 218 Po and 214 Pb) were carried out from November 2007 to April 2008 close to the top of the Schauinsland mountain, partly covered with forest, in South-West Germany. Samples were aspired from the same location at 2.5 m above ground level. We measured 222 Rn with a dual flow loop, two-filter detector and its short-lived progeny with a one-filter detector. A reference sector for events, facing a steep valley and dominated by pasture, was used to minimize differences between 222 Rn and progeny-derived 222 Rn activity concentrations. In the two major wind sectors covered by forest to a distance between 60 m and 80 m towards the station progeny-derived 222 Rn activity concentration was on average equal to 87% (without precipitation) and 74% (with precipitation) of 222 Rn activity concentration. The observations show that most of the time both detector types follow the same pattern. Still, there is no single disequilibrium factor that could be used to exactly transform short-lived progeny to 222 Rn activity concentration under all meteorological conditions.

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“…The data used in this study were measured with an electrostatic radon monitor, which had a minimum detection limit of 0.3 Bq m -3 for hourly averaged concentrations. 2) The measured concentration at Hachijo Island in 2006 averaged about 1.5 Bq m -3 , with a variation from the detection limit to values as high as about 5.0 Bq m -3 .…”

Section: Atmospheric 222 Rn Concentrationmentioning

confidence: 94%

Estimation of the Global 222Rn Flux Density from the Earth's Surface

2010

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Global 222 in the period of 1979-2007 using an 222 Rn exhalation model based on a porous media diffusion theory. This exhalation model calculated the 222 226 Ra content, soil water saturation, and soil temperature. The -2 s -1 . The annual variation in the -2 s -1 in March to a maximum of 23.6 mBq m -2 s -1 in September. The regional averages for the annual flux density varied from 8.3 mBq m -2 s -1 for the northern part of North America to 33.5 mBq m -2 s -1 for Australia. The latitudinal distribution of zonally averaged flux density was found to be in good agreement with the latitudinal decline at high latitudes in the Northern Hemisphere. The spatial and temporal variations were caused mainly by variations in the soil water content and soil 226 Ra content, but to a lesser extent by the soil simulated atmospheric 222 Rn concentration was substantially lower than that measured at Hachijo Island, implying that the

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Continuous measurements of outdoor radon concentrations at various locations in East Asia

Cited by 61 publications

References 11 publications

Ground based radon-222 observations and their application to atmospheric studies

Ground based radon-222 observations and their application to atmospheric studies

Comparison of one- and two-filter detectors for atmospheric <sup>222</sup>Rn measurements under various meteorological conditions

Estimation of the Global 222Rn Flux Density from the Earth's Surface

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Continuous measurements of outdoor radon concentrations at various locations in East Asia

Cited by 61 publications

References 11 publications

Ground based radon-222 observations and their application to atmospheric studies

Ground based radon-222 observations and their application to atmospheric studies

Comparison of one- and two-filter detectors for atmospheric &lt;sup&gt;222&lt;/sup&gt;Rn measurements under various meteorological conditions

Estimation of the Global 222Rn Flux Density from the Earth's Surface

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Comparison of one- and two-filter detectors for atmospheric <sup>222</sup>Rn measurements under various meteorological conditions