Investigating the vertical and spatial extent of radon-based classification of the atmospheric mixing state and impacts on seasonal urban air quality

Kikaj, Dafina; Chambers, Scott D.; Crawford, Jagoda; Kobal, Matjaž; Gregorič, Asta; Vaupotič, Janja

doi:10.1016/j.scitotenv.2023.162126

Cited by 10 publications

(6 citation statements)

References 80 publications

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“…The diurnal variation pa ern of CRn and EEC-Rn shows a maximum in the early morning and a minimum in the late afternoon, which is related to the vertical distribution of T at the ground level [37][38][39]. Combining the diurnal variation in T shown in Figure 6b, it can be observed that the diurnal range and intensity of T in spring are significantly greater than in winter.…”

Section: Discussionmentioning

confidence: 82%

“…This pa ern is opposite to the diurnal variation pa ern of CRn in winter, where CRn starts to decrease from 8:00. T influences the mixing depth of the atmosphere [39]. During the spring measurement period when dust storms frequently occur (Figure 9b), the weights of the influence of EEC-Rn and C Rn in variable A were similar, with loading coefficients of −0.98 and −0.83, respectively.…”

Section: Discussionmentioning

confidence: 92%

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Outdoor Radon and Its Progeny in Relation to the Particulate Matter during Different Polluted Weather in Beijing

Sun

Wang

2023

Atmosphere

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This study aimed to investigate the differences in the relationship between radon and its progeny concentrations and particulate matter concentrations under varying pollution weather conditions. Outdoor radon and its progeny concentrations were measured by a radon/thoron- and radon/thoron progeny monitor (ERS-RDM-2S) during haze and dust storm weather in Beijing. Particulate matter concentrations and meteorological data were simultaneously recorded. Results showed that radon and its progeny concentrations exhibited a diurnal variation pattern, with a minimum in the late afternoon and a maximum in the early morning. The average radon concentrations were similar under both pollution weather conditions, but significantly higher than the reported average for Beijing. The equilibrium equivalent radon concentration during haze was about two times that during a dust storm. PM10 concentrations were similar in both pollution weather conditions, but PM2.5 concentrations during haze were approximately 2.6 times higher than that during dust storms. A positive correlation was observed between radon and its progeny concentrations and particulate matter concentrations, but the correlation was significantly higher during haze than during dust storms. The higher PM2.5 concentration during haze significantly increased the correlation between radon and its progeny concentrations and particulate matter concentrations. We recommended protecting against radon exposure during pollutant weather, especially haze.

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Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 92%

Outdoor Radon and Its Progeny in Relation to the Particulate Matter during Different Polluted Weather in Beijing

Sun

Wang

2023

Atmosphere

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“…The recognition of radon's potential for atmospheric applications has grown since the 1990s. It is used as an airmass tracer [3][4][5] in many research fields, such as evaluating the global climate model (GCM) [6][7][8] and chemical transport model performance [9]; boundary layer meteorology research [10][11][12][13]; air pollution and urban climate research [14][15][16][17]; and greenhouse gas emission source identification and quantification [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Precision of Radon Measurements from Beta-Attenuation Monitors

Riley,

Jiang,

Gunashanhar

et al. 2024

Atmosphere

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Atmospheric radon measurements assist in many aspects of climate and meteorological research, notably as an airmass tracer and for modelling boundary layer development, mixing heights and stability. Daughter products from radon decay are sometimes incorporated into the particle pollution measurements of commercially available beta-attenuation monitors (BAM). BAMs incorporating radon measurements are used in air quality monitoring networks and can supplement traditional radon measurements. Here we compare in-situ radon measurements from Thermo Fisher Scientific (Franklin, MA, USA) BAM instruments (Thermo Scientific 5014i, Thermo Scientific 5030 SHARP, Thermo Anderson FH62C14) at two air quality monitoring stations in New South Wales, Australia. Between systems we find strong correlations for hourly measurements (r = 0.97–0.99); daily means (r = 0.97–0.99); hour of the day (r = 0.84–0.98); and month (r = 0.82–0.98). The regression analysis for radon measurements between systems showed strong linear responses, although there are some variations in the slopes of the regressions. This implies that with correction BAM measurements can be comparable to standard measurement techniques, for example, from the Australian Nuclear Science and Technology Organisation (ANSTO) dual flow loop monitors. Our findings imply that BAM derived radon measurements are precise, although their accuracy varies. BAM radon measurements can support studies on boundary layer development or where radon is used as an atmospheric transport tracer.

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“…Air pollution represents one of the most important drivers affecting the Earth's energy balance and hydrological cycle, climate and human health. Several outdoor air pollution exceedance events are driven both by controllable factors (emission sources and strengths), and climate variability acting at local to regional scales associated with the different mixing rates of the planetary boundary layer heights (PBL) [2]. Diurnal, seasonal and synoptic timescale changes of meteorological conditions, depending of the topographic setting, are the main factors influencing atmospheric mixing rates, which affects spatiotemporal variability of air quality [3].…”

Section: Introductionmentioning

confidence: 99%

Climate Effects of Aerosols and Radon on Covid-19 Pandemic in Bucharest Metropolitan Area

Zoran,

Savastru,

Savastru

et al. 2023

RAP Conference Proceedings

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This paper investigated the influences of urban aerosols and radon ( 222 Rn) together climate parameters variability at both local and regional scales in relationship with COVID-19 pandemic incidence and mortality in Bucharest metropolitan area of Romania, considered one of the European's most polluted hotspots cities. A spatiotemporal analysis of the daily particulate matter in two size fractions PM10 and PM2.5 in relation with daily radon concentrations and meteorological parameters was done through synergy of in-situ monitoring data and MODIS Terra/Aqua time-series satellite data for March 2020-April 2022 time period. This study investigated the COVID-19 waves patterns under different air quality and meteorological conditions, highlighting the role of synoptic anticyclonic stagnant conditions during each COVID-19 wave for SARS-CoV-2 virus spreading. These results contribute to a better understanding of urban decision makers and epidemiologists through considering the specific characteristics of different urban sectors for air quality improvement.

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Investigating the vertical and spatial extent of radon-based classification of the atmospheric mixing state and impacts on seasonal urban air quality

Cited by 10 publications

References 80 publications

Outdoor Radon and Its Progeny in Relation to the Particulate Matter during Different Polluted Weather in Beijing

Outdoor Radon and Its Progeny in Relation to the Particulate Matter during Different Polluted Weather in Beijing

Assessing the Precision of Radon Measurements from Beta-Attenuation Monitors

Climate Effects of Aerosols and Radon on Covid-19 Pandemic in Bucharest Metropolitan Area

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