A new subnationwide survey of outdoor and indoor 222Rn concentrations in China

Jin, Yihe; Wang, Z.; Iida, Takao; Ikebe, Yukimasa; Abe, Siro; Chen, H.; Wu, Lingsheng; Zeng, Qinghuai; Du, K.; Li, S.

doi:10.1016/s0160-4120(96)00168-7

Cited by 8 publications

(12 citation statements)

References 9 publications

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“…The reason was thought that long-term measurement of integrated method resulted in less statistic errors. Outdoor radon concentration in Shanghai was the lowest, and similar to the previous data [6,10,18], while outdoor radon concentration in Changchun was the highest, and at variance with the previous data. Signifi cant variance with the previous data can be found in Xian and Fuzhou.…”

Section: Distribution Of Outdoor Radon Concentrationsupporting

confidence: 89%

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Outdoor radon concentration in China

Pan

Liu

et al. 2016

Nukleonika

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Abstract.A nationwide survey was conducted in 2014 to investigate environmental outdoor radon level in 33 provincial cities across China. The radon detector used was a passive-type solid-state nuclear track detector, CR-39. Measurements were conducted under the same condition following the quality control programme. Outdoor radon concentrations in China ranged from 3 to 30.0 Bq·m , respectively. The radon concentrations in the locations near or along coastline were lower than the average value, while those located in the inland area were higher. As a whole, the result showed no big difference from the data measured during the period [1983][1984][1985][1986][1987][1988][1989][1990][1991][1992][1993][1994][1995][1996][1997][1998]. It demonstrated that the outdoor radon concentration level in China has not been changing remarkably for 20 years.

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Section: Distribution Of Outdoor Radon Concentrationsupporting

confidence: 89%

“…An agreement result was found that a mean outdoor radon concentration was 9.5 ± 1.9 Bq·m , ranging from 7.3 to 20.5 Bq·m −3 in Xian, respectively [18].…”

Section: Discussionsupporting

confidence: 61%

Outdoor radon concentration in China

Pan

Liu

et al. 2016

Nukleonika

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“…Emanation rate at China is of concern due to its high rate. Jin et al. (1998) reported annual mean surface 222 Rn concentrations at 10 sites in China.…”

Section: Chinamentioning

confidence: 99%

“…Some of the studies prior to 1980 were summarized by Gesell (1983). Concentrations over China in the 1990s were reported by Jin et al. (1998).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the atmospheric transport model NIRE-CTM-96 by using measured radon-222 concentrations

Taguchi¹,

Iida²,

Moriizumi³

2002

Tellus B

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An atmospheric transport model, NIRE‐CTM‐96, was evaluated by using measured radon‐222 concentrations. The model has 2.5×2.5 degree horizontal resolution and 15 vertical levels. Assimilated global meteorological data for 1990–1996 from the European Centre for Medium Range Weather Forecasts were used to drive the model. We used an emanation rate of radon‐222 of 1 atom cm−2 s−1 over mostly ice‐free land. Simulated concentrations were compared with measured concentrations for 22 sites worldwide including 10 stations in China. Simulated annual mean concentrations for Freiburg, Germany, and Socorro, New Mexico, and for four stations in northern China were consistent with the measured concentrations. Simulated daily concentrations for Ogasawara‐Hahajima, Japan, correlated well with the measured concentrations. Simulated upper tropospheric concentrations for Moffet Field, California, demonstrated the cross‐Pacific transport from central Eurasia and India‐Indochina area. Simulated concentrations for two stations in southern China were almost half of the measured concentrations. Mixing layer depth in the model was consistent with other estimates which indicates higher emanation rate there. Simulated concentrations for the South Indian Ocean and the Antarctic during summer were significantly lower than the measured concentrations; this difference was accounted for when emanation from the ocean at a rate of 0.01 atom cm−2 s−1 was included in the model. The model failed to simulate amplitudes of high‐concentration events at Mauna Loa. These high‐concentration events were possibly a result of filament‐like horizontal structure or laminated vertical structure. The vertical as well as horizontal resolution of the model were supposed to be insufficient to reproduce these fine structures.

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“…This is mainly due to the relatively low measurement density and restricted coverage. In India and China, for example, average indoor radon concentrations of approximately 23 Bq m -3 in both countries are derived from national surveys of only 1500 and 11,000 dwellings respectively ( (Cheng et al, 2002;Jin et al, 1996;Ramachandan and Sathish, 2011) compared with over 4,500,000 available for radon mapping in the UK. In the United States most measurements of indoor radon have been made using short-term charcoal monitors, so these cannot be used directly to estimate long-term average radon levels.…”

Section: A Non-geological Radon Potential Mappingmentioning

confidence: 99%

Radon in Air and Water

Appleton

2012

Essentials of Medical Geology

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A new subnationwide survey of outdoor and indoor 222Rn concentrations in China

Cited by 8 publications

References 9 publications

Outdoor radon concentration in China

Outdoor radon concentration in China

Evaluation of the atmospheric transport model NIRE-CTM-96 by using measured radon-222 concentrations

Radon in Air and Water

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