| Title: |
Radical budget analysis in a suburban European site during the MEGAPOLI summer field campaign |
| Authors: |
Michoud, Vincent; Kukui, Alexandre; Camredon, M.; Colomb, Aurélie; Borbon, Agnès; Miet, Killian; Aumont, B.; Beekmann, Matthias; Durand-Jolibois, Régine; Perrier, Sébastien; Zapf, Pascal; Siour, Guillaume; Ait-Helal, Warda; Locoge, Nadine; Sauvage, Stéphane; Afif, Charbel; Gros, Valérie; Furger, M.; Ancellet, Gérard; Doussin, J. F. |
| Contributors: |
Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)); Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS); TROPO - LATMOS; Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS); Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); 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); 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); Laboratoire de météorologie physique (LaMP); Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); Institut des Sciences Analytiques (ISA); Université Claude Bernard Lyon 1 (UCBL); Université de Lyon-Université de Lyon-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); Université Lille Nord (France); École des Mines de Douai (Mines Douai EMD); Institut Mines-Télécom Paris (IMT); Centre for Materials and Processes (CERI MP - IMT Nord Europe); Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Nord Europe); Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT); 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)); Paul Scherrer Institute (PSI); ANR-09-BLAN-0356,MEGAPOLI-PARIS,MEGAPOLI - PARIS : Pollution des AéRosols: Impact sur la qualité de l'air et quantification des Sources(2009); European Project: 212520,FP7-ENV-2007-1,FP7-ENV-2007-1,MEGAPOLI(2008); European Project: 228335,FP7-INFRASTRUCTURES-2008-1,FP7-INFRASTRUCTURES-2008-1,EUROCHAMP-2(2009) |
| Source: |
ISSN: 1680-7316. |
| Publisher Information: |
CCSD; European Geosciences Union |
| Publication Year: |
2012 |
| Collection: |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
| Subject Terms: |
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]; [SDE.MCG]Environmental Sciences/Global Changes |
| Description: |
Measurements of hydroxyl (OH) and peroxy (RO2) radicals by a Chemical Ionisation Mass Spectrometer (CIMS) were conducted during the MEGAPOLI summer field campaign at the SIRTA observatory near Paris, France, in July 2009. OH and RO2 showed a typical diurnal variation with averaged daytime maxima values around 5 × 106 and 1.2 × 108 molecule cm−3, respectively. Simultaneously, a large number of ancillary measurements, such as NOx, O3, HONO, HCHO and other VOCs were also conducted. These data provide an opportunity to assess our understanding of the radical chemistry in a suburban environment by comparing the radical observations to calculations. First, OH mixing ratios were estimated by a simple Photo Stationary State (PSS) calculation. The PSS calculation largely overestimates the OH mixing ratio compared with observations by 50%, especially at NOx mixing ratios lower than 10 ppb. This suggests that some loss processes were missing in the calculation at low NOx. Then, a photochemical box model simulation based on the Master Chemical Mechanism (MCM) and constrained by ancillary measurements was run to calculate radical concentrations. Various modelling procedures were set up to cope with the unavoidable lack of constraining measurements. They led to significant differences in simulated radical concentrations. OH and RO2 concentrations estimated by two selected model version were compared with measurements. These versions of the model were chosen because they represented the two extremes. The comparisons showed better results than the PSS calculations, with a slight overestimation of 12% and 5%, for OH and RO2 respectively, in average for the reference model, and an overestimation of approximately 20% for OH and an underestimation for RO2 for the 1h dilution model. Thus, we can conclude from our study that OH and RO2 radical levels agree on average with observations within the uncertainty range. Finally, an analysis of the radical budget, on a daily basis (06:00-18:00 UTC), indicates that HONO photolysis, O3 ... |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/grantAgreement//212520/EU/Megacities: Emissions, urban, regional and Global Atmospheric POLlution and climate effects, and Integrated tools for assessment and mitigation/MEGAPOLI; info:eu-repo/grantAgreement//228335/EU/Integration of European Simulation Chambers for Investigating Atmospheric Processes - Part 2/EUROCHAMP-2 |
| DOI: |
10.5194/acp-12-11951-2012 |
| Availability: |
https://hal.science/hal-00712273; https://hal.science/hal-00712273v1/document; https://hal.science/hal-00712273v1/file/acp-12-11951-2012.pdf; https://doi.org/10.5194/acp-12-11951-2012 |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.6A1F4782 |
| Database: |
BASE |