Evaluation of the Sources, Precursors, and Processing of Aerosols at a High-Altitude Tropical Site
| Autor: | Dominutti, Pamela, Chevassus, Emmanuel, Baray, Jean-Luc, Jaffrezo, Jean-Luc, Borbon, Agnès, Colomb, Aurélie, Deguillaume, Laurent, El Gdachi, Samira, Houdier, Stephan, Leriche, Maud, Metzger, Jean-Marc, Rocco, Manon, Tulet, Pierre, Sellegri, Karine, Freney, Evelyn |
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| Přispěvatelé: | 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)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire de Météorologie Physique (LaMP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA), Laboratoire d'aérologie (LAERO), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Laboratoire de l'Atmosphère et des Cyclones (LACy), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR)-Centre National de la Recherche Scientifique (CNRS)-Météo-France, Centre ESCER, Université du Québec à Montréal = University of Québec in Montréal (UQAM), Observatoire des Sciences de l'Univers de La Réunion (OSU-Réunion), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR), ANR-18-CE01-0013,BIO-MAIDO,Bio-physicochimie des nuages tropicaux au Maïdo (Île de la Réunion) : processus et impacts sur la formation des aérosols organiques secondaires(2018), European Project: 654109,H2020,H2020-INFRAIA-2014-2015,ACTRIS-2(2015) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Atmospheric Science
Cloud processing Positive matrix factorization Space and Planetary Science Geochemistry and Petrology ToF-ACSM [SDE.IE]Environmental Sciences/Environmental Engineering [CHIM.ANAL]Chemical Sciences/Analytical chemistry [SDE.MCG]Environmental Sciences/Global Changes Secondary organic aerosols Aqueous-phase chemistry Southern Hemisphere [SDE.ES]Environmental Sciences/Environmental and Society |
| Zdroj: | ACS Earth and Space Chemistry ACS Earth and Space Chemistry, 2022, ⟨10.1021/acsearthspacechem.2c00149⟩ |
| ISSN: | 2472-3452 |
| DOI: | 10.1021/acsearthspacechem.2c00149⟩ |
| Popis: | International audience; This work presents the results from a set of aerosol- and gas-phase measurements collected during the BIO-MAIDÖ field campaign in Reunion ́ between March 8 and April 5, 2019. Several offline and online sampling devices were installed at the Maidö Observatory (MO), a remote high-altitude site in the Southern Hemisphere, allowing the physical and chemical characterization of atmospheric aerosols and gases. The evaluation of short-lived gas-phase measurements allows us to conclude that air masses sampled during this period contained little or no anthropogenic influence. The dominance of sulfate and organic species in the submicron fraction of the aerosol is similar to that measured at other coastal sites.Carboxylic acids on PM10 showed a significant contribution of oxalic acid, a typical tracer of aqueous processed air masses, increasing at the end of the campaign. This result agrees with the positive matrix factorization analysis of the submicron organic aerosol, where more oxidized organic aerosols (MOOAs) dominated the organic aerosol with an increasing contribution toward the end of the campaign. Using a combination of air mass trajectories (model predictions), it was possible to assess the impact of aqueous phase processing on the formation of secondary organic aerosols(SOAs). Our results show how specific chemical signatures and physical properties of air masses, possibly affected by cloud processing, can be identified at Reunion. ́ These changes in properties are represented by a shift in aerosol size distribution to large diameters and an increased contribution of secondary sulfate and organic aerosols after cloud processing. |
| Databáze: | OpenAIRE |
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