| Title: |
Aerosol spectral optical properties in the Paris urban area and its peri-urban and forested surroundings during summer 2022 from ACROSS surface observations |
| Authors: |
Di Antonio, Ludovico; Di Biagio, Claudia; Formenti, Paola; Gratien, Aline; Michoud, Vincent; Cantrell, Christopher; Bauville, Astrid; Bergé, Antonin; Cazaunau, Mathieu; Chevaillier, Servanne; Cirtog, Manuela; Coll, Patrice; d'Anna, Barbara; de Brito, Joel; de Haan, David; Dignum, Juliette; Deshmukh, Shravan; Favez, Olivier; Flaud, Pierre-Marie; Gaimoz, Cecile; Hawkins, Lelia; Kammer, Julien; Language, Brigitte; Maisonneuve, Franck; Močnik, Griša; Perraudin, Emilie; Petit, Jean-Eudes; Acharja, Prodip; Poulain, Laurent; Pouyes, Pauline; Pronovost, Eva Drew; Riffault, Véronique; Roundtree, Kanuri; Shahin, Marwa; Siour, Guillaume; Villenave, Eric; Zapf, Pascal; Foret, Gilles; Beekmann, Matthias; Doussin, Jean-Francois |
| Contributors: |
Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)); Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité); ATMOSPHERE - LATMOS; Laboratoire Atmosphères, Observations Spatiales (LATMOS); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Laboratoire Chimie de l'environnement (LCE); Aix Marseille Université (AMU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); University of Oslo (UiO); Centre for Energy and Environment (CERI EE - IMT Nord Europe); Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Nord Europe); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT); University of San Diego (USD); Leibniz Institute for Tropospheric Research (TROPOS); Institut National de l'Environnement Industriel et des Risques (INERIS); Environnements et Paléoenvironnements OCéaniques (EPOC); École Pratique des Hautes Études (EPHE); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Harvey Mudd College; University of Nova Gorica; Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA); Chimie Atmosphérique Expérimentale (CAE); Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)); Institut national des sciences de l'Univers (INSU - CNRS); French national program LEFE (Les Enveloppes Fluides et l’Environnement) of the CNRS INSU; National Science Foundation IRES 1825094; GENCI at TGCC (grant 2022-A0130107232).; ANR-17-MPGA-0002,ACROSS,Atmospheric ChemistRy Of the Suburban ForeSt(2017); ANR-11-LABX-0005,Cappa,Physiques et Chimie de l'Environnement Atmosphérique(2011); European Project: 101036245,H2020-LC-GD-2020,H2020-LC-GD-2020-6,RI-URBANS(2021) |
| Source: |
ISSN: 1680-7316. |
| Publisher Information: |
CCSD; European Geosciences Union |
| Publication Year: |
2025 |
| Collection: |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
| Subject Terms: |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere |
| Description: |
International audience ; Abstract. The complex refractive index (CRI; n−ik) and the single scattering albedo (SSA) are key parameters driving the aerosol direct radiative effect. Their spatial, temporal, and spectral variabilities in anthropogenic–biogenic mixed environments are poorly understood. In this study, we retrieve the spectral CRI and SSA (370–950 nm wavelength range) from in situ surface optical measurements and the number size distribution of submicron aerosols at three sites in the greater Paris area, representative of the urban city, as well as its peri-urban and forested rural environments. Measurements were taken as part of the ACROSS (Atmospheric Chemistry of the Suburban Forest) campaign in June–July 2022 under diversified conditions: (1) two heatwaves leading to high aerosol levels, (2) an intermediate period with low aerosol concentrations, and (3) an episode of long-range-transported fire emissions. The retrieved CRI and SSA exhibit an urban-to-rural gradient, whose intensity is modulated by the weather conditions. A full campaign average CRI of 1.41−0.037i (urban), 1.52−0.038i (peri-urban), and 1.50−0.025i (rural) is retrieved. The imaginary part of the CRI (k) increases and the SSA decreases at the peri-urban and forest sites when exposed to the influence of the Paris urban plume. Values of k > 0.1 and SSA < 0.6 at 520 nm are related to a black carbon mass fraction larger than 10 %. Organic aerosols are found to contribute to more than 50 % of the aerosol mass and up to 10 % (urban), 17 % (peri-urban), and 22 % (forest) of the aerosol absorption coefficient at 370 nm. A k value of 0.022 (370 nm) was measured at the urban site for the long-range-transported fire episode. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
https://doi.org/10.25326/575; https://doi.org/10.25326/538; https://doi.org/10.25326/574; https://doi.org/10.25326/529; https://doi.org/10.25326/658; https://doi.org/10.25326/539; https://doi.org/10.25326/573; https://doi.org/10.25326/668; https://doi.org/10.25326/667; https://doi.org/10.25326/669; https://doi.org/10.25326/695; https://doi.org/10.25326/670; https://doi.org/10.25326/491; https://doi.org/10.25326/492; https://doi.org/10.25326/501; https://doi.org/10.25326/775; https://doi.org/10.25326/776; https://doi.org/10.25326/777; https://doi.org/10.25326/780; https://doi.org/10.25326/781; https://doi.org/10.25326/778; https://doi.org/10.25326/779; info:eu-repo/grantAgreement//101036245/EU/Research Infrastructures Services Reinforcing Air Quality Monitoring Capacities in European Urban & Industrial AreaS (RI-URBANS)/RI-URBANS |
| DOI: |
10.5194/acp-25-3161-2025 |
| Availability: |
https://hal.science/hal-05014894; https://hal.science/hal-05014894v1/document; https://hal.science/hal-05014894v1/file/acp-25-3161-2025.pdf; https://doi.org/10.5194/acp-25-3161-2025 |
| Rights: |
https://creativecommons.org/licenses/by-nc/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.533491DE |
| Database: |
BASE |