Spatial variability of VOCs, ozone, and carbonaceous aerosols during the 2022 European summer heatwave

作者：Wenche Aas, Thérèse Salameh, Robert Wegener, Heidi Hellén, Jean‐Luc Jaffrezo, Pontus Roldin, Elisabeth Alonso‐Blanco, ANDRES ALASTUEY, Crist Amelynck, Jgor Arduini, Benjamin Bergmans, Marie Bertrand, Agnès Borbon, Efstratios Bourtsoukidis, Laëtitia Bouvier, David Butterfield, Iris Buxbaum, Darius Čeburnis, Anja Claude, Aurélie Colomb, Sophie Darfeuil, James Dernie, Maximilien Desservettaz, Elías Díaz-Ramiro, Marvin Dufresne, René Dubus, Mario Duval, Marie Dury, Anna Font, Kirsten Fossum, Evelyn Freney, Gotzon Gangoiti, Yao Ge, M.C. Gómez, Francisco J. Gómez‐Moreno, Marie Gohy, Valérie Gros, Paul Hamer, Bryan Hellack, H. Herrmann, Robert Holla, Adéla Holubová, Niels Jensen, Tuija Jokinen, Matthew Jones, Uwe Käfer, Lukas Kesper, Dieter Klemp, Dagmar Kubistin, Angela Marinoni, Martina Mazzini, Vy Ngoc Thuy Dinh, Jurgita Ovadnevaitė, Tuukka Petäjä, Miguel Portillo-Estrada, Jitka Privoznikova, Jean-Philippe Putaud, S. Reimann, Laura Renzi, Véronique Riffault, Stuart J. Ritchie, C Robins, Begoña Artiñano Rodríguez de Torres, Laurent Poulain, Julian Rüdiger, Agnieszka Sanocka, E. Sáez De Cámara, Niels Schoon, Roger Seco, Ivan Simmons, Leïla Simon, David Simpson, Emmanuel Tison, August Thomasson, Svetlana Tsyro, Marsailidh Twigg, Tykkä Toni, Bert Verreyken, Ana Maria Yañez-Serrano, Sverre Solberg, Karen Yeung, Ilona Ylivinkka, Karl Espen Yttri, Ågot K. Watne, K Williams · 年份：2025 · DOI：10.5194/egusphere-2025-6166 · 被引用次数：2 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric Ozone and Climate、Air Quality and Health Impacts

Abstract. This study presents results from an Intensive Measurement Period conducted during the European heatwave of July 2022, focusing on ozone, volatile organic compounds (VOCs), and carbonaceous aerosols at 31 sites across Europe. The episode featured persistent high-pressure systems, record-breaking temperatures, widespread ozone exceedances and concurrent atmospheric new particle formation and growth events. Although the roles of biogenic and anthropogenic precursors in ozone, secondary organic aerosol (SOA) formation and nanoparticle growth are recognized, their relative importance during extreme events remains poorly constrained. This work therefore aimed to quantify these interactions using coordinated measurements and model simulations. Measurements showed that oxygenated VOCs formed the largest fraction of total VOCs, followed by non-methane hydrocarbons (NMHCs) and aromatics, with substantial contributions from both anthropogenic and biogenic sources. Elevated ozone and SOA levels were driven by the combined influence of biogenic VOCs and NOx emissions under predominantly NOx-limited conditions. Isoprene, NMHCs, and O-VOCs dominated the ozone formation potential, while aromatics and monoterpenes were the most important SOA precursors. Model simulations indicated that higher NOx concentrations can reduce SOA formation by about 10 %. The campaign also highlighted observational gaps underscoring the need for broader and higher-resolution VOC monitoring across Europe....