| Title: |
Characterization of brown carbon absorption in different European environments through source contribution analysis |
| Authors: |
Navarro-Barboza, Hector; Rovira, Jordi; Obiso, Vincenzo; Pozzer, Andrea; Via, Marta; Alastuey, Andres; Querol, Xavier; Perez, Noemi; Savadkoohi, Marjan; Chen, Gang; Yus-Díez, Jesus; Ivancic, Matic; Rigler, Martin; Eleftheriadis, Konstantinos; Vratolis, Stergios; Zografou, Olga; Gini, Maria; Chazeau, Benjamin; Marchand, Nicolas; Prevot, Andre; Dallenbach, Kaspar; Ehn, Mikael; Luoma, Krista; Petäjä, Tuukka; Tobler, Anna; Necki, Jaroslaw; Aurela, Minna; Timonen, Hilkka; Niemi, Jarkko; Favez, Olivier; Petit, Jean-Eudes; Putaud, Jean-Philippe; Hueglin, Christoph; Pascal, Nicolas; Chauvigné, Aurélien; Conil, Sébastien; Pandolfi, Marco; Jorba, Oriol |
| Contributors: |
Barcelona Supercomputing Center - Centro Nacional de Supercomputacion (BSC-CNS); Laboratoire Chimie de l'environnement (LCE); Aix Marseille Université (AMU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); Paul Scherrer Institut (PSI); Institut National de l'Environnement Industriel et des Risques (INERIS); 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)); European Commission - Joint Research Centre Ispra (JRC); interaction Clouds Aerosols Radiations - ICARE/AERIS Data and Services Center - UMS 2877 (ICARE); Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales Toulouse (CNES)-Université de Lille-Centre National de la Recherche Scientifique (CNRS); Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA); This research has been supported by the Ministerio de Ciencia e Innovación (grant no. PRE2018-084988), the Ministerio de Ciencia, Innovación y Universidades (grant no. RTI2018-099894-B-I00), the Ministerio de Asuntos Económicos y Transformación Digital, Gobierno de España (grant no. PID2019-108990PB-100), the EU HORIZON European Research Council (grant no. 101056783), and Horizon 2020 (grant nos. 821205, 101036245). |
| 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 ; Brown carbon (BrC) is a fraction of organic aerosol (OA) that absorbs radiation in the ultraviolet and short visible wavelengths. Its contribution to radiative forcing is uncertain due to limited knowledge of its imaginary refractive index (k). This study investigates the variability of k for OA from wildfires, residential, shipping, and traffic emission sources over Europe. The Multiscale Online Nonhydrostatic Atmosphere Chemistry (MONARCH) model simulated OA concentrations and source contributions, feeding an offline optical tool to constrain k values at 370 nm. The model was evaluated against OA mass concentrations from aerosol chemical speciation monitors (ACSMs) and filter sample measurements, as well as aerosol light absorption measurements at 370 nm derived from an Aethalometer™ from 12 sites across Europe. Results show that MONARCH captures the OA temporal variability across environments (regional, suburban, and urban background). Residential emissions are a major OA source in colder months, while secondary organic aerosol (SOA) dominates in warmer periods. Traffic is a minor primary OA contributor. Biomass and coal combustion significantly influence OA absorption, with shipping emissions also notable near harbors. Optimizing k values at 370 nm revealed significant variability in OA light absorption, influenced by emission sources and environmental conditions. Derived k values for biomass burning (0.03 to 0.13), residential (0.008 to 0.13), shipping (0.005 to 0.08), and traffic (0.005 to 0.07) sources improved model representation of OA absorption compared to a constant k. Introducing such emission source-specific constraints is an innovative approach to enhance OA absorption in atmospheric models. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.5194/acp-25-2667-2025 |
| Availability: |
https://hal.science/hal-05035588; https://hal.science/hal-05035588v1/document; https://hal.science/hal-05035588v1/file/2025-004.pdf; https://doi.org/10.5194/acp-25-2667-2025 |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.46C109E2 |
| Database: |
BASE |