Understanding the local and remote source contributions to ambient O 3 during a pollution episode using a combination of experimental approaches in the Guadalquivir valley, southern Spain.

Autor: In 't Veld M; Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain; Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), Barcelona 08034, Spain. Electronic address: marten.veld@idaea.csic.es., Carnerero C; Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain; Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), Barcelona 08034, Spain., Massagué J; Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain; Department of Mining, Industrial and ICT Engineering, Universitat Politècnica de Catalunya (UPC), Manresa, 08242, Spain., Alastuey A; Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain., de la Rosa JD; Department of Geology, University of Huelva, Huelva 21819, Spain., Sánchez de la Campa AM; Department of Geology, University of Huelva, Huelva 21819, Spain., Escudero M; Centro Universitario de la Defensa, Academia General Militar, Zaragoza 50090, Spain., Mantilla E; Centro de Estudios Ambientales del Mediterráneo, CEAM, Valencia 46980, Spain., Gangoiti G; Department of Chemical and Environmental Engineering, University of Basque Country, Leioa 48940, Spain., García-Pando CP; Catalan Institution for Research and Advanced Studies, ICREA, Barcelona 08010, Spain; Catalan Institution for Research and Advanced Studies, ICREA, Barcelona 08010, Spain., Olid M; Barcelona Supercomputing Center, BSC-CNS, Barcelona 08034, Spain., Moreta JR; Agencia Estatal de Meteorología, AEMET, Madrid 28071, Spain., Hernández JL; Agencia Estatal de Meteorología, AEMET, Madrid 28071, Spain., Santamaría J; Agencia Estatal de Meteorología, AEMET, Madrid 28071, Spain., Millán M; Centro de Estudios Ambientales del Mediterráneo, CEAM, Valencia 46980, Spain., Querol X; Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Jul 10; Vol. 777, pp. 144579. Date of Electronic Publication: 2021 Feb 20.
DOI: 10.1016/j.scitotenv.2020.144579
Abstrakt: The Guadalquivir Valley is one of three major O 3 hotspots in Spain. An airborne and surface measurement campaign was carried out from July 9th to 11th, 2019 to quantify the local/regional O 3 contributions using experimental approaches. Air quality and meteorology data from surface measurements, a microlight aircraft, a helium balloon, and remote sensing data (TROPOMI-NO2-ESA) were used to obtain the 3D distribution of O 3 and various tracer pollutants. O 3 accumulation over 2.5 days started with inputs from oceanic air masses transported inland by sea breezes, which drew O 3 and its precursors from a local/regional origin to the northeastern end of the basin. The orographic-meteorological setting of the valley caused vertical recirculation of the air masses inside the valley that caused the accumulation by increasing regional background O 3 concentration by 25-30 ppb. Furthermore, possible Mediterranean O 3 contributions and additional vertical recirculation through the entrainment zone of the convective boundary layer also contributed. Using particulate matter finer than 2.5 μm (PM 2.5 ), ultrafine particles (UFP), and black carbon (BC) as tracers of local sources, we calculated that local contributions increased regional O 3 levels by 20 ppb inside specific pollution plumes transported by the breeze into the valley, and by 10 ppb during midday when flying over an area with abundant agricultural burning during the morning. Air masses that crossed the southern boundaries of the Betic system at mid-altitude (400-1850 m a.s.l.) on July 10th and 11th may have provided additional O 3 . Meanwhile, a decreasing trend at high altitudes (3000-5000 m a.s.l.) was observed, signifying that the impact of stratospheric O 3 intrusion decreased during the campaign.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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