Impact of air masses on the distribution of 210Pb in the southeast of Iberian Peninsula air

Chham, E.; Piñero-García, F.; González-Rodelas, P.; Ferro-Garcı́a, M.A.

doi:10.1016/j.jenvrad.2017.06.030

Cited by 24 publications

(7 citation statements)

References 47 publications

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“…c), The frequent Saharan dust intrusions occurring at this location (Chham et al, 2017) during this season occurring at high altitudes (>3000 m), and finally getting to the ground level by vertical transport of the air masses.…”

Section: Be Evolutionmentioning

confidence: 92%

Sources of the seasonal-trend behaviour and periodicity modulation of 7Be air concentration in the atmospheric surface layer observed in southeastern Spain

Chham

Milena-Pérez

Piñero-García

et al. 2019

Atmospheric Environment

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Section: Be Evolutionmentioning

confidence: 92%

Sources of the seasonal-trend behaviour and periodicity modulation of 7Be air concentration in the atmospheric surface layer observed in southeastern Spain

Chham

Milena-Pérez

Piñero-García

et al. 2019

Atmospheric Environment

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“…Studies from different geographic regions have found different seasonal trends in gross beta activity and 210 Pb concentrations. For example, studies in Spain and several other Mediterranean cities have found maximum radioactivity concentrations in summer and minimum concentrations in the winter; 6,9,10,16,18,22,23,47,48 studies in mid-and northern-Europe have found maximum concentrations in the winter and minimum concentrations in the spring and summer; 48−52 and studies in China and Japan have found higher concentrations in winter and early spring, and lower concentrations in the summer. 44,53−55 These seasonal differences highlight the role of regional meteorology and air mass movement in driving trends in particle radioactivity.…”

Section: ■ Discussionmentioning

confidence: 99%

Exposure to Particle Beta Radiation in Greater Massachusetts and Factors Influencing Its Spatial and Temporal Variability

Blomberg

Schwartz

et al. 2020

Environ. Sci. Technol.

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Particle radioactivity is a property of airborne particles caused by the presence of naturally occurring or anthropogenic radionuclides. Recent studies have found associations between particle radioactivity and adverse health outcomes, including changes in blood pressure and lung function. However, the spatiotemporal distribution of particle radioactivity and factors influencing its variability have not been extensively studied. We address these knowledge gaps using measurements of gross beta activity, collected at seven Environmental Protection Agency (EPA) RadNet monitors located in and around Massachusetts. We apply back-trajectory analysis to identify prevailing air mass trajectories and find that these trajectories strongly influence seasonal trends in beta activity. We also evaluate the effects of different meteorological predictors on daily beta activity concentrations using a mixed-effect model. Important predictors of beta activity include air mass trajectories, temperature, and relative humidity. Finally, we create a series of random forest models to impute missing beta activity concentrations at each RadNet monitor for use in future health studies. This is the first study to analyze spatiotemporal trends in particle radioactivity using measurements from the EPA RadNet system.

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“…To date, extensive studies on 7 Be and 210 Pb in atmospheric deposition as well as in aerosols have been conducted worldwide (Ioannidou et al, 2005;Alonso-Hernández et al, 2014;Du et al, 2015;Gai et al, 2015;Grossi et al, 2016;Chham et al, 2017;Dueñas et al, 2017). However, combined measurements of 7 Be and 210 Pb in aerosols and in bulk fallout are still limited.…”

Section: Introductionmentioning

confidence: 99%

Temporal Variations of 7Be and 210Pb Activity Concentrations in the Atmosphere and Aerosol Deposition Velocity in Shenzhen, South China

Liu

et al. 2020

Aerosol Air Qual. Res.

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Naturally occurring beryllium-7 ( 7 Be) and lead-210 ( 210 Pb) serve as powerful tracers in atmospheric studies. In this study, 7 Be and 210 Pb were simultaneously measured in atmospheric aerosols and deposition samples for an entire year (from January to December 2017) in Shenzhen, South China. The activity concentrations of the airborne 7 Be and 210 Pb ranged from 0.33 to 9.42 mBq m -3 (averaging 3.23 mBq m -3 ) and from 0.59 to 4.72 mBq m -3 (averaging 1.58 mBq m -3 ), respectively, and were observed to be high during the winter but low during the summer. Moreover, the relatively high 210 Pb concentration was probably due to the elevated level of radon in this region's soil. The deposition fluxes of the 7 Be and 210 Pb were found to range from 0.25 to 3.04 Bq m -2 day -1 (averaging 1.57 Bq m -2 day -1 ) and from 0.34 to 1.31 Bq m -2 day -1 (averaging 0.73 Bq m -2 day -1 ), respectively. The temporal trends of these fluxes were largely influenced by rainfall and the origin and pathway of air masses, as well as by atmospheric circulation. Based on their concentrations in the aerosols and their deposition fluxes, the average deposition velocities of 7 Be and 210 Pb were calculated to be 0.83 and 0.62 cm s -1 , respectively. The deposition velocities of both radionuclides correlated well with the amount of rainfall, indicating that precipitation plays a crucial role in removing 7 Be and 210 Pb from the air. The activity size distributions of these nuclides combined with the characteristic meteorological conditions in this region resulted in high deposition velocities during summer and low ones during winter.

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Impact of air masses on the distribution of 210Pb in the southeast of Iberian Peninsula air

Cited by 24 publications

References 47 publications

Sources of the seasonal-trend behaviour and periodicity modulation of 7Be air concentration in the atmospheric surface layer observed in southeastern Spain

Sources of the seasonal-trend behaviour and periodicity modulation of 7Be air concentration in the atmospheric surface layer observed in southeastern Spain

Exposure to Particle Beta Radiation in Greater Massachusetts and Factors Influencing Its Spatial and Temporal Variability

Temporal Variations of 7Be and 210Pb Activity Concentrations in the Atmosphere and Aerosol Deposition Velocity in Shenzhen, South China

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