Incomplete mass closure in atmospheric nanoparticle growth

npj Climate and Atmospheric Science, Год журнала: 2025, Номер 8(1)

Опубликована: Фев. 26, 2025

Язык: Английский

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High chemodiversity of nitrogen-containing organic compounds in vehicle emissions driven by transformative reactions

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138803 - 138803

Опубликована: Июнь 1, 2025

Язык: Английский

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Insights into the sources of ultrafine particle numbers at six European urban sites obtained by investigating COVID-19 lockdowns

Atmospheric chemistry and physics, Год журнала: 2024, Номер 24(16), С. 9515 - 9531

Опубликована: Авг. 29, 2024

Abstract. Lockdown restrictions in response to the COVID-19 pandemic led curtailment of many activities and reduced emissions primary air pollutants. Here, we applied positive matrix factorisation particle size distribution (PSD) data from six monitoring sites (three urban background three roadside) between four European cities (Helsinki, Leipzig, Budapest, London) evaluate how number concentrations (PNCs) their sources changed during respective 2020 lockdown periods compared reference years 2014–2019. A common factors were resolved sites, including nucleation, road traffic semi-volatile fraction (road trafficsvf), solid trafficsf), diffuse (wood smoke + aged traffic), ozone-associated secondary aerosol (O3-associated SA), inorganic (SIA). Nucleation, traffic, largest contributors mean PNCs periods. However, SIA mass concentrations, irrespective environment type. Total lower at two urban-background all roadside lockdown. The nucleation trafficsvf was highly variable, although trafficsf consistently sites. responses largely consistent mostly Secondary aerosols SA SIA) exhibited extensive reductions These variegated lockdowns across Europe point a complex network sinks contributing PSDs.

Язык: Английский

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Insights into the sources of ultrafine particle numbers at six European urban sites obtained by investigating COVID–19 lockdowns

Опубликована: Янв. 23, 2024

Abstract. Lockdown restrictions in response to the COVID–19 pandemic led curtailment of many activities and reduced emissions primary air pollutants. Here, we applied Positive Matrix Factorization particle size distribution (PSD) data from six monitoring sites (three urban background three roadside) between four European cities (Helsinki, Leipzig, Budapest, London) evaluate how number concentrations (PNCs) their sources changed during respective 2020 lockdown periods compared reference years 2014–2019. A common factors were resolved sites, including nucleation, road traffic semi–volatile fraction (road trafficsvf), solid trafficsf), diffuse (woodsmoke + aged traffic), ozone–associated secondary aerosol (O3–associated SA), inorganic (SIA). Nucleation, traffic, largest contributors mean PNCs periods. However, SIA mass concentrations, irrespective environment type. Total lower at two all roadside lockdown. Nucleation trafficsvf highly variable, although trafficsf consistently sites. The responses largely consistent mostly Secondary aerosols (O3-associated SA SIA) exhibited extensive reductions These variegated lockdowns across Europe point a complex network sinks contributing PSDs.

Язык: Английский

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Comment on egusphere-2023-3053

Опубликована: Апрель 10, 2024

Abstract. Lockdown restrictions in response to the COVID–19 pandemic led curtailment of many activities and reduced emissions primary air pollutants. Here, we applied Positive Matrix Factorization particle size distribution (PSD) data from six monitoring sites (three urban background three roadside) between four European cities (Helsinki, Leipzig, Budapest, London) evaluate how number concentrations (PNCs) their sources changed during respective 2020 lockdown periods compared reference years 2014–2019. A common factors were resolved sites, including nucleation, road traffic semi–volatile fraction (road traffic_svf), solid traffic_sf), diffuse (woodsmoke + aged traffic), ozone–associated secondary aerosol (O₃–associated SA), inorganic (SIA). Nucleation, traffic, largest contributors mean PNCs periods. However, SIA mass concentrations, irrespective environment type. Total lower at two all roadside lockdown. Nucleation traffic_svf highly variable, although traffic_sf consistently sites. The responses largely consistent mostly Secondary aerosols (O₃-associated SA SIA) exhibited extensive reductions These variegated lockdowns across Europe point a complex network sinks contributing PSDs.

Язык: Английский

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Comment on egusphere-2023-3053

Опубликована: Апрель 20, 2024

Abstract. Lockdown restrictions in response to the COVID–19 pandemic led curtailment of many activities and reduced emissions primary air pollutants. Here, we applied Positive Matrix Factorization particle size distribution (PSD) data from six monitoring sites (three urban background three roadside) between four European cities (Helsinki, Leipzig, Budapest, London) evaluate how number concentrations (PNCs) their sources changed during respective 2020 lockdown periods compared reference years 2014–2019. A common factors were resolved sites, including nucleation, road traffic semi–volatile fraction (road traffic_svf), solid traffic_sf), diffuse (woodsmoke + aged traffic), ozone–associated secondary aerosol (O₃–associated SA), inorganic (SIA). Nucleation, traffic, largest contributors mean PNCs periods. However, SIA mass concentrations, irrespective environment type. Total lower at two all roadside lockdown. Nucleation traffic_svf highly variable, although traffic_sf consistently sites. The responses largely consistent mostly Secondary aerosols (O₃-associated SA SIA) exhibited extensive reductions These variegated lockdowns across Europe point a complex network sinks contributing PSDs.

Язык: Английский

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Comment on egusphere-2023-3053

Опубликована: Май 16, 2024

Abstract. Lockdown restrictions in response to the COVID–19 pandemic led curtailment of many activities and reduced emissions primary air pollutants. Here, we applied Positive Matrix Factorization particle size distribution (PSD) data from six monitoring sites (three urban background three roadside) between four European cities (Helsinki, Leipzig, Budapest, London) evaluate how number concentrations (PNCs) their sources changed during respective 2020 lockdown periods compared reference years 2014–2019. A common factors were resolved sites, including nucleation, road traffic semi–volatile fraction (road traffic_svf), solid traffic_sf), diffuse (woodsmoke + aged traffic), ozone–associated secondary aerosol (O₃–associated SA), inorganic (SIA). Nucleation, traffic, largest contributors mean PNCs periods. However, SIA mass concentrations, irrespective environment type. Total lower at two all roadside lockdown. Nucleation traffic_svf highly variable, although traffic_sf consistently sites. The responses largely consistent mostly Secondary aerosols (O₃-associated SA SIA) exhibited extensive reductions These variegated lockdowns across Europe point a complex network sinks contributing PSDs.

Язык: Английский

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Aerosol particle number concentration, ultrafine particle number fraction, and new particle formation measurements near the international airports in Berlin, Germany – First results from the BEAR study

Environment International, Год журнала: 2024, Номер 193, С. 109086 - 109086

Опубликована: Окт. 19, 2024

Язык: Английский

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