An Insight into Recent Pm1 Aerosol Light Scattering Properties and Particle Number Concentration Variabilities at the Suburban Site Atoll in Northern France

48 Pages Posted: 19 Oct 2024

See all articles by Lenka Suchánková

Lenka Suchánková

Academy of Sciences of the Czech Republic - Laboratory of Aerosols Chemistry and Physics; Masaryk University - RECETOX Centre; Global Change research Institute

Suzanne Crumeyrolle

University of Lille

Eric Bourianne

Université de Lille

Roman Prokeš

affiliation not provided to SSRN

Ivan Holoubek

affiliation not provided to SSRN

Vladimír Ždímal

affiliation not provided to SSRN

Isabelle Chiapello

Université de Lille

Abstract

Aerosol particles in the PM1 fraction considerably influence the climate-related effects of aerosols and impact human health despite representing very variable fractions of the total aerosol mass concentration. Aerosol optical measurement techniques (aerosol light scattering) may not be sufficiently effective for detecting all particles in the PM1 fraction, particularly regarding number concentration. The present study investigates temporal variations of aerosol light scattering properties and particle number concentration (PNC) at different size modes in the PM1 fraction at the atmospheric site ATOLL (The Atmospheric Observations in Lille), Northern France from January 2018 to February 2023. The total scattering coefficient σsp decreased annually by 6% and 8% at 525 and 635 nm, respectively. Maximum annual changes occur in winter and summer seasons with a decrease above 10% per year. Although the backscattering coefficient (σbsp) at 525 nm significantly decreased in winter, this did not result in a significant overall decline over time. This suggests an increase in aerosol cooling that co-occurs with a reduction in aerosol scattering mass. Despite a decrease in aerosol light scattering, PNC exhibited a notable annual increase in concentration of N20-30 nm and N30-60 nm, which led to an increase in the total N20-800 nm size range. N20-30nm increased by 10% annually, with the highest increase by 37% in spring. Both traffic and photooxidative processes influenced PNCs, underscoring the need for a more comprehensive investigation of the detailed particle number size distribution to assess air quality and the health effects of increased ultrafine PNC at urban/suburban sites in Europe.

Keywords: optical properties, ultrafine particles, urban environment, temporal variability, air quality

Suggested Citation

Suchánková, Lenka and Crumeyrolle, Suzanne and Bourianne, Eric and Prokeš, Roman and Holoubek, Ivan and Ždímal, Vladimír and Chiapello, Isabelle, An Insight into Recent Pm1 Aerosol Light Scattering Properties and Particle Number Concentration Variabilities at the Suburban Site Atoll in Northern France. Available at SSRN: https://ssrn.com/abstract=4992919 or http://dx.doi.org/10.2139/ssrn.4992919

Lenka Suchánková (Contact Author)

Academy of Sciences of the Czech Republic - Laboratory of Aerosols Chemistry and Physics ( email )

Rozvojova 1, Prague
Czech Republic

Masaryk University - RECETOX Centre ( email )

Brno
Czech Republic

Global Change research Institute ( email )

Bělidla 986/4a
Brno, 60300
Czech Republic

Suzanne Crumeyrolle

University of Lille ( email )

Eric Bourianne

Université de Lille ( email )

Cité Scientifique
Villeneuve-d'Ascq, 59650
France

Roman Prokeš

affiliation not provided to SSRN ( email )

No Address Available

Ivan Holoubek

affiliation not provided to SSRN ( email )

No Address Available

Vladimír Ždímal

affiliation not provided to SSRN ( email )

No Address Available

Isabelle Chiapello

Université de Lille ( email )

Cité Scientifique
Villeneuve-d'Ascq, 59650
France

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