Sources and Processes Influencing Local Arctic Wintertime Air Pollution

Autor: Law, Kathy S., Brett, Natalie, Raut, Jean-Christophe, Onishi, Tatsuo, Ravetta, François, Dieudonné, Elsa, Barret, Brice, Fochesatto, Gilberto Javier, Arnold, Steven, Temime-Roussel, Brice, d'Anna, B., Albertin, Sarah, Cesler‐maloney, Meeta, Simpson, William, Mao, Jingqiu, Roberts, Tjarda, Pohorsky, Roman, Baccarini, Andrea, Schmale, Julia, Decesari, Stefano, Donateo, Antonio, Pappaccogli, Gianluca, Scoto, Federico, Gilliam, Robert, Fahey, Kathleen
Přispěvatelé: Cardon, Catherine, Laboratoire Atmosphères, Milieux, 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), Aix Marseille Université (AMU), Laboratoire Chimie de l'environnement (LCE), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), TROPO - 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), Laboratoire de Physico-Chimie de l'Atmosphère (LPCA), Université du Littoral Côte d'Opale (ULCO), 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), University of Alaska [Fairbanks] (UAF), University of Leeds, Department of Chemistry and Biochemistry [Fairbanks], Geophysical Institute [Fairbanks], Ecole Polytechnique Fédérale de Lausanne (EPFL), CNR Institute of Atmospheric Sciences and Climate (ISAC), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), US Environmental Protection Agency (EPA)
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: AGU Fall Meeting 2022
AGU Fall Meeting 2022, 0000, à renseigner, Unknown Region
AGU Fall Meeting 2022, Dec 2022, Chicago, United States. pp.A51J-05
Popis: International audience; Wintertime Arctic air pollution is influenced by long-range transport of remote sources and local within-Arctic sources contributing to the build up of Arctic haze. Local emissions and resulting ground-level pollutant abundances are enhanced during cold winters especially during cold stable episodes with strong surface temperature inversions and light winds that limit pollutant dispersion, and lead to air quality exceedances. Fairbanks in Interior Alaska is a city with episodes of severe wintertime pollution. However, there are many uncertainties in our understanding about pollution sources and secondary aerosol formation under cold, dark winter conditions, when photochemistry is limited. The role of meteorological processes in the Arctic boundary layer is also poorly understood and often difficult to model. These issues were comprehensively examined through the collection of datasets on atmospheric composition and meteorology during the international ALPACA (Alaskan Layered Pollution and Chemical Analysis) field campaign in January and February 2022 in Fairbanks. One goal is to understand how meteorological processes influence surface, and vertical distributions, of aerosols and trace gases. Here, we analyze a combination of measurements collected at sites experiencing different pollution levels, including surface aerosol composition, trace gas profiles collected on a tethered balloon (EPFL helikite), wind lidar and other meteorological measurements. An overview of the different measurements will be presented as a function of meteorological conditions, in particular atmospheric stability. Particular episodes will be highlighted showing evidence for vertical exchange (turbulence) or possible influence from elevated power plant stack emissions. Particle dispersion modelling is used to examine emission sources contributing to surface pollution episodes and elevated plumes. The regional extent of pollution from the Fairbanks area will also be considered and compared to pollutant levels in background Arctic Haze air masses. This study contributes to air Pollution in the Arctic: Climate, Environment and Societies (PACES)-ALPACA. The French contribution is part of the CASPA (Climate-relevant Aerosol Sources and Processes in the Arctic)/IPEV project.
Databáze: OpenAIRE
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