| Title: |
Impacts of summertime photochemical aging on the physicochemical properties of aerosols in a Paris suburban forest region |
| Authors: |
Yu, Chenjie; Formenti, Paola; de Brito, Joel; Bauville, Astrid; Bergé, Antonin; Bouzidi, Hichem; Cazaunau, Mathieu; Cirtog, Manuela; Di Biagio, Claudia; Di Antonio, Ludovico; Gaimoz, Cécile; Maisonneuve, Franck; Zapf, Pascal; Seubert, Tobias; Andersen, Simone; Dewald, Patrick; Türk, Gunther; Crowley, John; Kukui, Alexandre; Xue, Chaoyang; Denjean, Cyrielle; Garrouste, Olivier; Etienne, Jean-Claude; Wu, Huihui; Allan, James; Liu, Dantong; Wu, Yangzhou; Cantrell, Christopher; Michoud, Vincent |
| 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); 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); 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); Atmospheric Chemistry Department MPIC; Max Planck Institute for Chemistry (MPIC); Max-Planck-Gesellschaft-Max-Planck-Gesellschaft; Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E); Institut national des sciences de l'Univers (INSU - CNRS)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES); Multiphase Chemistry Department Mainz; Centre national de recherches météorologiques (CNRM); Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Météo-France; Department of Earth and Environmental Sciences Manchester (EES); University of Manchester Manchester; National Centre for Atmospheric Science Manchester (NCAS); Zhejiang University Hangzhou, China; Guilin University of Electronic Technology; French National program LEFE (Les Enveloppes Fluides et l’Environnement) of the CNRS/INSU (Centre National de la Recherche Scientifique/Institut National des Sciences de L’Univers); The PEGASUS facility receives funding as a national facility (instrument national) of the CNRS INSU; The French State under the France-2030 programme and Initiative of Excellence of the University of Lille are acknowledged for the funding and support granted to the R-CDP-24-003-AREA project.; ANR-20-CE01-0010,ACROSS-AO,Chimie atmosphérique des forêts suburbaines - Observations aéroportées(2020); ANR-17-MPGA-0002,ACROSS,Atmospheric ChemistRy Of the Suburban ForeSt(2017) |
| 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: |
[SDE]Environmental Sciences |
| Description: |
International audience ; Organic Aerosols (OA), which significantly affect the climate system and human health, often contain a substantial fraction of atmospherically processed species known as Oxygenated Organic Aerosol (OOA). However, the formation pathways and evolution of OOA remain poorly understood. To address this need, an experiment was conducted in a suburban forest in the Paris region to systematically study the evolution of OOA and their optical properties. Our results show that the photochemical processes drove significant increases in total submicron particle mass concentrations in the forest site, primarily via the production of OOA derived from both biogenic and anthropogenic emissions. Air mass origin critically influenced Particulate Matter (PM) pollution levels and photochemical activity: under elevated pollution and intense solar radiation during continental air mass-dominated periods, rapid formation of More-Oxidized OOA (MO-OOA) occurred. This MO-OOA dominated Brown Carbon (BrC) contributions, enhancing short-wavelength light absorption by 35 % on average after a relative ~24-hour photochemical aging process. Conversely, periods dominated by clean maritime air masses featured humid, low‑radiation conditions that yielded reduced pollution levels and an increased proportion of nitrogen‑enriched, Less‑Oxidized OOA (LO‑OOA). Suppressed photochemical activity during the clean maritime period limited MO-OOA production, resulting in a lower overall oxidation state of OA. These findings underscore the dual role of photochemistry in shaping aerosol optical properties and climate impacts, highlighting the necessity of accounting for air mass dynamics and oxidation pathways in suburban forest regions. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.5194/egusphere-2025-2667 |
| Availability: |
https://hal.science/hal-05149112; https://hal.science/hal-05149112v1/document; https://hal.science/hal-05149112v1/file/egusphere-2025-2667.pdf; https://doi.org/10.5194/egusphere-2025-2667 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.BD119B15 |
| Database: |
BASE |