Comment on essd-2024-80 DOI Creative Commons

Hasna Chebaicheb,

Joël Brito,

Tanguy Amodeo

et al.

Published: June 20, 2024

Abstract. This paper presents a first comprehensive analysis of long-term measurements atmospheric aerosol components from Aerosol Chemical Speciation Monitor (ACSM) and multi-wavelength Aethalometer (AE33) instruments collected between 2015 2021 at 13 (sub)urban sites as part the French CARA program. The datasets contain mass concentrations major chemical species within PM1, namely organic aerosols (OA), nitrate (NO3-), ammonium (NH4+), sulfate (SO42-), non-sea-salt chloride (Cl-), equivalent black carbon (eBC). Rigorous quality control, technical validation, environmental evaluation processes were applied, adhering to both guidance reference laboratory for air monitoring Aerosol, Clouds, Trace gases Research Infrastructure (ACTRIS) standard operating procedures. Key findings include geographical differences in composition, seasonal variations, diel patterns, which are influenced by meteorological conditions, anthropogenic activities, proximity emission sources. Overall, OA dominates PM1 each site (43–60 %), showing distinct seasonality with higher (i) winter, due enhanced residential heating emissions, (ii) summer, increased photochemistry favoring secondary formation. NO3 is second most important contributor (15–30 peaking late winter early spring, especially northern France, playing significant role during pollution episodes. SO4 (8–14 %) eBC (5–11 complement fine species, their relative contributions strongly origin masses stability respectively. Such chemically-speciated multi-year have value scientific community, offering opportunities future research, including source apportionment studies, trend analyses, epidemiological investigations. They also vital evaluating validating regional models. In this regard, comparison CHIMERE Transport Model shows high correlations simulations measurements, albeit underestimating 46–76 %. Regional discrepancies concentration levels emphasize importance these models tailoring mitigation strategies.

Language: Английский

Response of biogenic secondary organic aerosol formation to anthropogenic NOx emission mitigation DOI Creative Commons
Zhizhao Wang, Florian Couvidat, Karine Sartelet

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 927, P. 172142 - 172142

Published: April 6, 2024

This study investigates the effects of anthropogenic nitrogen oxide (NOx) mitigation reduction on secondary organic aerosol (SOA) formation from monoterpene and sesquiterpene precursors across Europe, using three-dimensional (3-D) Chemical Transport Model (CTM) CHIMERE. Two SOA mechanisms varying complexity are employed: GENOA-generated Biogenic Mechanism (GBM) Hydrophobic/Hydrophilic Organic mechanism (H

Language: Английский

Citations

5
Response of Biogenic Secondary Organic Aerosol Formation to Anthropogenic Nox Emission Mitigation DOI
Zhizhao Wang, Florian Couvidat, Karine Sartelet

et al.

Published: Jan. 1, 2023

This study investigates the effects of anthropogenic nitrogen oxide (NOx) mitigation reduction on secondary organic aerosol (SOA) formation from monoterpene and sesquiterpene precursors across Europe, using three-dimensional (3-D) Chemical Transport Model (CTM) CHIMERE.Two SOA mechanisms varying complexity are employed: GENOA-generated Biogenic Mechanism (GBM) Hydrophobic/Hydrophilic Organic mechanism (H2O). GBM is a condensed generated by automatic near-explicit chemical (i.e., Master - MCM peroxy radical autoxidation PRAM) GENerator Reduced Aerosol Mechanisms version 2.0 (GENOA v2.0). Conversely, H2O developed primarily based experimental data, with simplified pathways yields reflecting those chamber experiments. In 3-D simulations conducted for summer 2018 over implementation significantly improved model's performance in comparison to mechanism, yielding results more consistent measured concentrations extracted EBAS database.In response NOx emission mitigation, simulated increase but decrease when unless highly oxygenated molecules (HOMs) scheme incorporated. The become oxidized elevated after reduction, particularly GBM. These higher likely due enhanced reaction rates radicals (RO2) HO2, resulting products degradation that favors HOM formation.The suggest detailed necessary accurate predictions modeling informed policy decisions.

Language: Английский

Citations

11
Characterizing the Speed of Chemical Cycling in the Atmosphere DOI Creative Commons

E Li,

Patrick Obin Sturm,

Sam J. Silva

et al.

Geophysical Research Letters, Journal Year: 2025, Volume and Issue: 52(4)

Published: Feb. 14, 2025

Abstract Chemical cycling drives the production and loss of many important atmospheric constituents. The speed chemical is a particularly valuable indicator for characterizing measuring effects such cycles on oxidant chemistry, air quality, climate. Here, we apply graph theoretical methods to explicitly quantify analyze characteristic timescales gas‐phase in troposphere stratosphere, as simulated by GEOS‐Chem mechanism. We identify all two‐, three‐, four‐reaction mechanism calculate timescale each individual cycle. find that varies orders magnitude at any given location but tends be faster urban‐ biogenically‐dominated regions, slower during night. further fraction contains rate‐determining step, demonstrate large potential mechanisms recycle oxidants like OH.

Language: Английский

Citations

0
Multi-year high time resolution measurements of fine PM at 13 sites of the French Operational Network (CARA program): Data processing and chemical composition DOI Creative Commons

Hasna Chebaicheb,

Joël Brito,

Tanguy Amodeo

et al.

Published: May 7, 2024

Abstract. This paper presents a first comprehensive analysis of long-term measurements atmospheric aerosol components from Aerosol Chemical Speciation Monitor (ACSM) and multi-wavelength Aethalometer (AE33) instruments collected between 2015 2021 at 13 (sub)urban sites as part the French CARA program. The datasets contain mass concentrations major chemical species within PM1, namely organic aerosols (OA), nitrate (NO3-), ammonium (NH4+), sulfate (SO42-), non-sea-salt chloride (Cl-), equivalent black carbon (eBC). Rigorous quality control, technical validation, environmental evaluation processes were applied, adhering to both guidance reference laboratory for air monitoring Aerosol, Clouds, Trace gases Research Infrastructure (ACTRIS) standard operating procedures. Key findings include geographical differences in composition, seasonal variations, diel patterns, which are influenced by meteorological conditions, anthropogenic activities, proximity emission sources. Overall, OA dominates PM1 each site (43–60 %), showing distinct seasonality with higher (i) winter, due enhanced residential heating emissions, (ii) summer, increased photochemistry favoring secondary formation. NO3 is second most important contributor (15–30 peaking late winter early spring, especially northern France, playing significant role during pollution episodes. SO4 (8–14 %) eBC (5–11 complement fine species, their relative contributions strongly origin masses stability respectively. Such chemically-speciated multi-year have value scientific community, offering opportunities future research, including source apportionment studies, trend analyses, epidemiological investigations. They also vital evaluating validating regional models. In this regard, comparison CHIMERE Transport Model shows high correlations simulations measurements, albeit underestimating 46–76 %. Regional discrepancies concentration levels emphasize importance these models tailoring mitigation strategies.

Language: Английский

Citations

2
Modelling molecular composition of SOA from toluene photo-oxidation at urban and street scales DOI Creative Commons
Karine Sartelet, Zhizhao Wang, Victor Lannuque

et al.

Environmental Science Atmospheres, Journal Year: 2024, Volume and Issue: 4(8), P. 839 - 847

Published: Jan. 1, 2024

Near-explicit chemical mechanisms representing toluene SOA formation are reduced using the GENOA algorithm and used in 3D simulations of air quality over Greater Paris streets a district near Paris.

Language: Английский

Citations

2
Modeling the molecular composition of secondary organic aerosol under highly polluted conditions: A case study in the Yangtze River Delta Region in China DOI
Qi Huang,

Hutao Lu,

Jingyi Li

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 938, P. 173327 - 173327

Published: May 16, 2024

Language: Английский

Citations

1
Multiyear high-temporal-resolution measurements of submicron aerosols at 13 French urban sites: data processing and chemical composition DOI Creative Commons

Hasna Chebaicheb,

Joël Brito,

Tanguy Amodeo

et al.

Earth system science data, Journal Year: 2024, Volume and Issue: 16(11), P. 5089 - 5109

Published: Nov. 5, 2024

Abstract. This paper presents a first comprehensive analysis of long-term measurements atmospheric aerosol components from chemical speciation monitor (ACSM) and multiwavelength Aethalometer (AE33) instruments collected between 2015 2021 at 13 (sub)urban sites as part the French CARA (Chemical Characterization Particles) program. The datasets contain mass concentrations major species within submicron aerosols (PM1), namely organic (OAs), nitrate (NO3-), ammonium (NH4+), sulfate (SO42-), non-sea-salt chloride (Cl−), equivalent black carbon (eBC). Rigorous quality control, technical validation, environmental evaluation processes were applied, adhering to both guidance Reference Laboratory for Air Quality Monitoring (LCSQA) Aerosol, Clouds, Trace Gases Research Infrastructure (ACTRIS) standard operating procedures. Key findings include geographical differences in composition, seasonal variations, diel patterns, which are influenced by meteorological conditions, anthropogenic activities, proximity emission sources. Overall, OA dominates PM1 each site (43 %–60 % total mass), showing distinct seasonality with higher (i) winter, due enhanced residential heating emissions, (ii) summer, increased photochemistry favoring secondary formation. NO3 is second most important contributor (15 %–30 %), peaking late winter early spring, especially northern France, playing significant role during pollution episodes. SO4 (8 %–14 %) eBC (5 %–11 complement fine-aerosol species, their relative contributions strongly origin air masses stability respectively. A comparison 3D transport model (CTM) CHIMERE shows high correlations simulations measurements, albeit an concentration underestimation 46 %–76 %. Regional discrepancies levels emphasize importance these respect validating models tailoring mitigation strategies. can be found https://doi.org/10.5281/zenodo.13318298 (Chebaicheb et al., 2024).

Language: Английский

Citations

1
Comment on essd-2024-80 DOI Creative Commons

Hasna Chebaicheb,

Joël Brito,

Tanguy Amodeo

et al.

Published: May 30, 2024

Abstract. This paper presents a first comprehensive analysis of long-term measurements atmospheric aerosol components from Aerosol Chemical Speciation Monitor (ACSM) and multi-wavelength Aethalometer (AE33) instruments collected between 2015 2021 at 13 (sub)urban sites as part the French CARA program. The datasets contain mass concentrations major chemical species within PM1, namely organic aerosols (OA), nitrate (NO3-), ammonium (NH4+), sulfate (SO42-), non-sea-salt chloride (Cl-), equivalent black carbon (eBC). Rigorous quality control, technical validation, environmental evaluation processes were applied, adhering to both guidance reference laboratory for air monitoring Aerosol, Clouds, Trace gases Research Infrastructure (ACTRIS) standard operating procedures. Key findings include geographical differences in composition, seasonal variations, diel patterns, which are influenced by meteorological conditions, anthropogenic activities, proximity emission sources. Overall, OA dominates PM1 each site (43–60 %), showing distinct seasonality with higher (i) winter, due enhanced residential heating emissions, (ii) summer, increased photochemistry favoring secondary formation. NO3 is second most important contributor (15–30 peaking late winter early spring, especially northern France, playing significant role during pollution episodes. SO4 (8–14 %) eBC (5–11 complement fine species, their relative contributions strongly origin masses stability respectively. Such chemically-speciated multi-year have value scientific community, offering opportunities future research, including source apportionment studies, trend analyses, epidemiological investigations. They also vital evaluating validating regional models. In this regard, comparison CHIMERE Transport Model shows high correlations simulations measurements, albeit underestimating 46–76 %. Regional discrepancies concentration levels emphasize importance these models tailoring mitigation strategies.

Language: Английский

Citations

0
Comment on essd-2024-80 DOI Creative Commons

Hasna Chebaicheb,

Joël Brito,

Tanguy Amodeo

et al.

Published: June 20, 2024

Abstract. This paper presents a first comprehensive analysis of long-term measurements atmospheric aerosol components from Aerosol Chemical Speciation Monitor (ACSM) and multi-wavelength Aethalometer (AE33) instruments collected between 2015 2021 at 13 (sub)urban sites as part the French CARA program. The datasets contain mass concentrations major chemical species within PM1, namely organic aerosols (OA), nitrate (NO3-), ammonium (NH4+), sulfate (SO42-), non-sea-salt chloride (Cl-), equivalent black carbon (eBC). Rigorous quality control, technical validation, environmental evaluation processes were applied, adhering to both guidance reference laboratory for air monitoring Aerosol, Clouds, Trace gases Research Infrastructure (ACTRIS) standard operating procedures. Key findings include geographical differences in composition, seasonal variations, diel patterns, which are influenced by meteorological conditions, anthropogenic activities, proximity emission sources. Overall, OA dominates PM1 each site (43–60 %), showing distinct seasonality with higher (i) winter, due enhanced residential heating emissions, (ii) summer, increased photochemistry favoring secondary formation. NO3 is second most important contributor (15–30 peaking late winter early spring, especially northern France, playing significant role during pollution episodes. SO4 (8–14 %) eBC (5–11 complement fine species, their relative contributions strongly origin masses stability respectively. Such chemically-speciated multi-year have value scientific community, offering opportunities future research, including source apportionment studies, trend analyses, epidemiological investigations. They also vital evaluating validating regional models. In this regard, comparison CHIMERE Transport Model shows high correlations simulations measurements, albeit underestimating 46–76 %. Regional discrepancies concentration levels emphasize importance these models tailoring mitigation strategies.

Language: Английский

Citations

0