Intra-Annual Deposition of Atmospheric 210Pb,210Po and the Residence Times of Aerosol in Xiamen, China

Wang, Zhou; Yang, Weifeng; Chen, Min; Lin, Peng; Qiu, Yusheng

doi:10.4209/aaqr.2013.05.0170

Cited by 21 publications

(11 citation statements)

References 48 publications

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“…Igarashi et al, 1998;Hirose et al, 2004 (Wang et al, 2014). The deposition of 7 Be exhibited an intra-annual fluctuation ( Zhang, 2004;Chen, 2006), showing similar intra-annual variation pattern to 7 Be in the present study (Fig.…”

Section: Resultssupporting

confidence: 68%

“…Based on the similar removal pathway of both 7 Be and 210 Pb ( Fig. 3; Baskaran et al, 1993;Kim, 2000;Huh et al, 2006;Wang et al, 2014), it is reasonable to use the flux ratios of 7 Be to 210 Pb to substitute their activity ratios as an alternative strategy (Baskaran, 2011;Yang et al, 2012;Wang, 2013 Pb ratio (5.72 ± 0.30) was higher than the mean value (Fig. 5), while the ratios were lower than the average in other months (3.73 ± 0.09).…”

Section: Exchange Of Air Mass Between the Stratosphere And Tropospherementioning

confidence: 99%

“…The transport of cosmogenic phosphorus (i.e., 32 P and 33 P) from stratosphere to surface air is less than 28 days in Xiamen (Chen, 2006). Pb ratios (Wang et al, 2014). Thus, the resident timescale allows aerosols in surface air in Xiamen to be transported into the upper troposphere and stratosphere via vertical mixing.…”

Section: Exchange Of Air Mass Between the Stratosphere And Tropospherementioning

confidence: 99%

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Atmospheric Deposition of 7Be in the Southeast of China: A Case Study in Xiamen

Zhang

Yang

Chen

et al. 2016

Aerosol Air Qual. Res.

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Be deposition and precipitation, existing in both northeast and southwest monsoon seasons, suggested the dominant removal of atmospheric 7 Be via precipitation. However, the correlations showed a large slope for the northeast monsoon season, indicating higher 7 Be contents in the atmosphere during the northeast monsoon prevailing months, supported by the precipitation-normalized 7 Be and the temporal variability of 7 Be/ 210 Pb ratios. Such a scenario revealed more intensive exchange of air mass between the stratosphere and troposphere during the northeast monsoon prevailing months. Together with the high pollutant concentrations in ambient air observed in these seasons, the results indicated that the pollutants in Xiamen might enter into the upper troposphere via vertical air mass exchange.

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Section: Resultssupporting

confidence: 68%

Section: Exchange Of Air Mass Between the Stratosphere And Tropospherementioning

confidence: 99%

Section: Exchange Of Air Mass Between the Stratosphere And Tropospherementioning

confidence: 99%

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Atmospheric Deposition of 7Be in the Southeast of China: A Case Study in Xiamen

Zhang

Yang

Chen

et al. 2016

Aerosol Air Qual. Res.

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“…Asia contributes more than one third of the global aerosol BC emission (Bond et al, ; Jurado et al, ). Since the atmospheric deposition over the SCS is heavily influenced by the Asian monsoons (Wang et al, ; Zhang et al, ), the SCS is expected to be an important region receiving atmospherically deposited BC (Liu et al, ). Meanwhile, about 1.7 × 10 12 m 3 of river water is discharged into the SCS each year, probably inputting large amounts of DBC to the SCS as observed in the sediments (Jia et al, ; Sun et al, ).…”

Section: Introductionmentioning

confidence: 99%

Source and Fate of Dissolved Black Carbon in the Western South China Sea During the Southwest Monsoon Prevailing Season

et al. 2017

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Dissolved black carbon (DBC) is of importance for understanding the marine carbon cycle especially on long time scales owing to its refractory nature in the dissolved organic carbon pool. However, its geochemical behavior is poorly understood in the open oceans due to limited DBC data. Here 86 seawater samples were determined using the benzene‐polycarboxylic acid method to investigate the source and fate of DBC in the western South China Sea. The DBC concentration varied from 0.49 to 1.60 μmol L−1, averaging 0.95 μmol L−1. Spatially, the Mekong River plume (i.e., MR plume) showed higher DBC concentrations and (B6CA + B5CA)/(B4CA + B3CA) ratios (i.e., RH/L) in the mixed layer than the distal regions. In addition, the DBC concentration positively correlated with salinity in the mixed layer within the MR plume, indicating the important DBC input from the Mekong River. In intermediate water (500–1500 m), DBC varied from 0.70 to 0.85 μmol L−1 and the RH/L value continually increased with depth, implying another DBC source with distinct RH/L ratio comparing with the euphotic zone. Based on a conservative mixing model, the Mekong River and atmospheric deposition collectively input 38–100 Gg DBC each year, and over one third of DBC were removed within the euphotic zone, probably via photodegradation and/or adsorption on particles. These results highlighted the different DBC behavior in the euphotic and intermediate zones and lent support to DBC as a proxy for tracing water mixing in the intermediate and deep oceans.

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“…Being a gas, radon easily migrates away from radium in large amount. Radon in the atmosphere mainly comes from the continents and has a very little input from the oceans (Wang et al, 2014). There are many other natural radionuclides like 22 Na, 32 Be, which are major pollutants in the atmosphere and are dangerous to human being (Papastefanou, 2009a), but radon is more important as it contributes about half of the background radiation to which we are all exposed (Cothern and Lappenbusch, 1986).…”

Section: Introductionmentioning

confidence: 99%

Study of Indoor Radon, Thoron, Their Progeny Concentration and Radon Exhalation Rate in the Environs of Mohali, Punjab, Northern India

Mehta

Singh

Chauhan

et al. 2015

Aerosol Air Qual. Res.

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Radon and its progeny are major contributors that deteriorate the indoor air quality and are the major source of radiation dose received by general population of the world. Keeping this in mind the environmental monitoring of radon-thoron and their progeny in dwellings of district Mohali, Punjab, India has been carried out. The radon-thoron twin dosimeter cups were used for the study. The study of the exhalation rate of the soil samples of Kharar, Kurali and Derabassi of the district Mohali and the sand samples available from the study area has also been carried out for the comparison purpose using can echnique. The aim of the study is the possible health risk assessment in the dwellings of this particular region for which data is not available in literature. The indoor radon concentration varied from 22.8 ± 0.7 Bq/m 3 to 45.0 ± 2.2 Bq/m 3 with an average of 33.7 Bq/m 3 while the thoron concentration in the same dwellings varied from 1.7 ± 0.1 Bq/m 3 to 27.6 ± 1.2 Bq/m 3 with an average of 12.8 Bq/m 3 . Annual dose received by the inhabitants in the dwellings under study varied from 0.64 to 1.64 mSv with an average of 1.19 mSv. The radon mass and surface exhalation rates of the soil samples varied from 0.32 to 2.6 mBq/kg/h with an average of 1.36 ± 0.2 mBq/kg/h and from 7.3 to 58.2 mBq/m 2 /h with an average of 28.3 ± 5.1 mBq/m 2 /h respectively.

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Intra-Annual Deposition of Atmospheric 210Pb,210Po and the Residence Times of Aerosol in Xiamen, China

Cited by 21 publications

References 48 publications

Atmospheric Deposition of 7Be in the Southeast of China: A Case Study in Xiamen

Atmospheric Deposition of 7Be in the Southeast of China: A Case Study in Xiamen

Source and Fate of Dissolved Black Carbon in the Western South China Sea During the Southwest Monsoon Prevailing Season

Study of Indoor Radon, Thoron, Their Progeny Concentration and Radon Exhalation Rate in the Environs of Mohali, Punjab, Northern India

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