| Title: |
Simulation chamber study of the spectral mass absorption, scattering and extinction cross sections (MAC, MSC, MEC) of fresh and aged combustion aerosols |
| Authors: |
Heuser, Johannes; Di Biagio, C.; Renzi, L.; Marinoni, Angela; Jérôme, Yon; Zanatta, Marco; Yu, C.; Bergé, Antonin; Cazaunau, Mathieu; Chevaillier, Servanne; Laj, Paolo; Massabò, Dario; Noyalet, Gael; Pangui, Edouard; Prati, P.; Termine-Roussel, Brice; Vecchi, Roberta; Bernardoni, Vera; Vernocchi, Virginia; 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); CNR Institute of Atmospheric Sciences and Climate (ISAC); National Research Council of Italy; Complexe de recherche interprofessionnel en aérothermochimie (CORIA); Université de Rouen Normandie (UNIROUEN); Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie); Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS); Karlsruhe Institute of Technology = Karlsruher Institut für Technologie (KIT); Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP); Université Grenoble Alpes (UGA); Institut des Géosciences de l’Environnement (IGE); Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Observatoire des Sciences de l'Univers de Grenoble (Fédération OSUG)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP); Università degli studi di Genova = University of Genoa = Université de Gênes (UniGe); Laboratoire Chimie de l'environnement (LCE); Aix Marseille Université (AMU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB); Institut national des sciences de l'Univers (INSU - CNRS) |
| Source: |
EGU 2023 ; https://normandie-univ.hal.science/hal-04085427 ; EGU 2023, Apr 2023, Vienna, Austria. ⟨10.5194/egusphere-egu23-462⟩ |
| Publisher Information: |
CCSD |
| Publication Year: |
2023 |
| Subject Terms: |
[SDE]Environmental Sciences |
| Subject Geographic: |
Vienna; Austria |
| Description: |
International audience ; Carbonaceous soot particles are formed during incomplete combustion of fossil fuels, biofuels or biomass and are considered to be a significant proportion of aerosol emission, especially in polluted areas, and to contain light-absorbing carbon fractions. The light-absorbing carbon components make these particles exhibit positive radiative forcing and thus they contribute to atmospheric warming processes. The exact contribution to this process however still has significant uncertainties. One of the sources of uncertainty is related to the capacity to accurately describe soot spectral optical properties (MAC/MSC/MEC - mass absorption/scattering/extinction cross-sections in m2g-1; CRI - complex refractive index), due to significant uncertainties for key measurements like the absorption coefficient or absorbing mass fraction. A second source is considered to be the change of the optical properties with the variable physico-chemical state of soot (e.g. chemical composition, morphology, primary particle size, aggregate size distribution, coating and mixing state) which depends on (i) the combustion conditions/sources and is (ii) known to change during atmospheric lifetime due to ageing and mixing processes.The present work aims at providing new measurements of soot spectral optical properties and investigating their dependence on particles’ physico-chemical state and the role of measurement uncertainties. For this, a set of original experiments was performed in the 4.3m3 CESAM atmospheric simulation chamber (https://cesam.cnrs.fr/) on soot aerosols generated by a commercial propane diffusion flame soot generator (miniCAST model 6204 TYPE C, JING). In these experiments, the variability of soot properties due to (i) generation and (ii) atmospheric ageing was explored. Different combustion conditions going from fuel–leaner to fuel-richer were set to produce soot aerosol with different effective densities, EC/TC-ratios ranging from 0.8 ± 0.1 to 0.0 ± 0.1 and size distributions with median ... |
| Document Type: |
conference object |
| Language: |
English |
| DOI: |
10.5194/egusphere-egu23-462 |
| Availability: |
https://normandie-univ.hal.science/hal-04085427; https://doi.org/10.5194/egusphere-egu23-462 |
| Rights: |
https://about.hal.science/hal-authorisation-v1/ |
| Accession Number: |
edsbas.98565285 |
| Database: |
BASE |