The influence of vegetation drought stress on formaldehyde and ozone distributions over a central European city

Autor: Heidelinde Trimmel, Paul Hamer, Monika Mayer, Stefan F. Schreier, Philipp Weihs, Josef Eitzinger, Hans Sandén, Anne Charlott Fitzky, Andreas Richter, Jean-Christophe Calvet, Bertrand Bonan, Catherine Meurey, Islen Vallejo, Sabine Eckhardt, Gabriela Sousa Santos, Safae Oumami, Joaquim Arteta, Virginie Marécal, Leonor Tarrasón, Thomas Karl, Harald E. Rieder
Přispěvatelé: Institute for Meteorology and Climatology [Vienna] (BOKU-Met), Universität für Bodenkultur Wien = University of Natural Resources and Life [Vienne, Autriche] (BOKU), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-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)-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 -Centre National de la Recherche Scientifique (CNRS), Norwegian Institute for Air Research (NILU), Institute of Meteorology, Universität Leipzig, Universität Innsbruck [Innsbruck]
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Atmospheric Environment
Atmospheric Environment, 2023, 304, ⟨10.1016/j.atmosenv.2023.119768⟩
ISSN: 1352-2310
1873-2844
Popis: To estimate the effect of vegetation stress and changes in biogenic volatile organic compound (BVOC) emissions on urban ozone (O3) levels we perform a systematic, observation-based analysis of the relationship between formaldehyde (HCHO) mixing ratios, meteorological parameters, measurement-based drought indicators and O3 over the central European city of Vienna, Austria. In addition, numerical models SURface EXternalisée (SURFEX), Model of Emissions of Gases and Aerosols from Nature (MEGAN) Vers.2.1 and 3 and MOdèle de Chimie A Grande Echelle (MOCAGE) are combined to estimate the soil moisture, the spatial distribution and drought response of isoprene emissions, and the resulting distribution of HCHO in the atmosphere. To analyse the effect of drought during spring and summer we contrast observations during dry and reference years. Our results show that the observed HCHO can be explained using the simulated isoprene emissions as well as observed and simulated vegetation drought responses. HCHO mixing ratios differ strongly between dry and reference seasons. Spring-time precipitation deficits facilitate reduced HCHO mixing ratios due to delayed and weakened plant growth. In consequence also O3 burdens are lowered due to reduced BVOC precursor emissions. These reductions occur despite radiation levels being higher than during the reference year, illustrating the strong potential of spring-time BVOC emissions to modulate urban O3 burdens. Conversely, during summer elevated O3 levels occur during local drought conditions. These are driven by advected isoprene originating from nearby forest areas, which are not affected by drought. Our results regarding elevated summer-time O3 burdens under vegetation heat and drought stress are in good agreement with previous work.
Databáze: OpenAIRE
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