Possible influence of shipping emissions on metals in size-segregated particulate matter in Guanabara Bay (Rio de Janeiro, Brazil)

Silveira, Renata Simões; Corrêa, Sérgio Machado; Neto, Newton de Magalhães

doi:10.1007/s10661-022-10517-7

Cited by 2 publications

(1 citation statement)

References 28 publications

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“…Therefore, we propose that the long-range transport of such V emissions is the reason for the increased summer concentrations seen at UK Metals Networks monitoring stations. The sub-micron particulate size fractions of these V emissions (<0.4 µm) [27,30,31] and the increased late-spring to early-autumn temperatures aiding dispersion and transport, especially for Belfast as it is a port that sits outside the UK's ECA, lead to greater contributions from these sources in the summer compared to the winter.…”

Section: Emission Sourcementioning

confidence: 99%

Seasonality of Heavy Metal Concentrations in Ambient Particulate Matter in the UK

Butterfield,

Brown,

Brown

2024

Atmosphere

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The seasonal characteristics of air pollutant concentrations are important for understanding variations in emissions released into the air and in atmospheric chemistry. The patterns seen can be influenced by anthropogenic emissions, meteorological conditions, and the transport of pollutants over long and short distances. Whilst seasonality is well understood for some pollutants such as ozone and polycyclic aromatic hydrocarbons, it is poorly understood and under-investigated for heavy metals in particulate matter (PM). This work studies long-term datasets of heavy metals in PM from a relevant UK air quality monitoring network, demonstrating the seasonal characteristics of the concentrations of these metals for the first time. Surprisingly, both ‘high in winter–low in summer’ and ‘low in winter–high in summer’ seasonality was observed, with some metals showing little or no seasonality. The ‘high in winter–low in summer’ seasonality (particularly for As) is attributable to the dominant contribution being from local primary sources, such as burning process producing larger PM sizes. The ‘low in winter–high in summer’ seasonality (particularly for V) is attributable to weak or non-seasonal local sources being dominated by contributions from medium and long-range transport during the summer months, when pollutant transport is more efficient. The findings contribute significantly to our understanding of the seasonality of metals in PM concentrations and the role played by the long-range transport of pollutants. Conclusions are also drawn about the implications for the calculation of annual averages on compliance-based air quality networks if data from a time series of a pollutant that displays seasonal characteristics are missing.

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Section: Emission Sourcementioning

confidence: 99%