000101623 001__ 101623 000101623 005__ 20230519145424.0 000101623 0247_ $$2doi$$a10.1016/j.scitotenv.2020.144579 000101623 0248_ $$2sideral$$a123947 000101623 037__ $$aART-2021-123947 000101623 041__ $$aeng 000101623 100__ $$aIn ''t Veld, M. 000101623 245__ $$aUnderstanding the local and remote source contributions to ambient O3 during a pollution episode using a combination of experimental approaches in the Guadalquivir valley, southern Spain 000101623 260__ $$c2021 000101623 5060_ $$aAccess copy available to the general public$$fUnrestricted 000101623 5203_ $$aThe Guadalquivir Valley is one of three major O3 hotspots in Spain. An airborne and surface measurement campaign was carried out from July 9th to 11th, 2019 to quantify the local/regional O3 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 O3 and various tracer pollutants. O3 accumulation over 2.5 days started with inputs from oceanic air masses transported inland by sea breezes, which drew O3 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 O3 concentration by 25–30 ppb. Furthermore, possible Mediterranean O3 contributions and additional vertical recirculation through the entrainment zone of the convective boundary layer also contributed. Using particulate matter finer than 2.5 μm (PM2.5), ultrafine particles (UFP), and black carbon (BC) as tracers of local sources, we calculated that local contributions increased regional O3 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 O3. Meanwhile, a decreasing trend at high altitudes (3000–5000 m a.s.l.) was observed, signifying that the impact of stratospheric O3 intrusion decreased during the campaign. 000101623 536__ $$9info:eu-repo/grantAgreement/ES/AEI/RTI2018-095937-B-I00$$9info:eu-repo/grantAgreement/ES/MINECO/BES-2017-080027-FPI$$9info:eu-repo/grantAgreement/ES/MINECO/RYC-2015-18690$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/CGL2016-78594-R$$9info:eu-repo/grantAgreement/ES/MITECO/CAES2017-010 000101623 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/ 000101623 590__ $$a10.754$$b2021 000101623 592__ $$a1.806$$b2021 000101623 594__ $$a14.1$$b2021 000101623 591__ $$aENVIRONMENTAL SCIENCES$$b26 / 279 = 0.093$$c2021$$dQ1$$eT1 000101623 593__ $$aEnvironmental Chemistry$$c2021$$dQ1 000101623 593__ $$aWaste Management and Disposal$$c2021$$dQ1 000101623 593__ $$aEnvironmental Engineering$$c2021$$dQ1 000101623 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000101623 700__ $$aCarnerero, C. 000101623 700__ $$aMassagué, J. 000101623 700__ $$aAlastuey, A. 000101623 700__ $$aRosa, J.D. de la 000101623 700__ $$aSánchez de la Campa, A.M. 000101623 700__ $$0(orcid)0000-0001-8227-5689$$aEscudero, M.$$uUniversidad de Zaragoza 000101623 700__ $$aMantilla, E. 000101623 700__ $$aGangoiti, G. 000101623 700__ $$aPérez García-Pando, C. 000101623 700__ $$aOlid, M. 000101623 700__ $$aMoreta, J.R. 000101623 700__ $$aHernández, J.L. 000101623 700__ $$aSantamaría, J. 000101623 700__ $$aMillán, M. 000101623 700__ $$aQuerol, X. 000101623 7102_ $$12002$$2385$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Física Aplicada 000101623 773__ $$g777 (2021), 144579 [18 pp.]$$pSci. total environ.$$tSCIENCE OF THE TOTAL ENVIRONMENT$$x0048-9697 000101623 8564_ $$s6934491$$uhttps://zaguan.unizar.es/record/101623/files/texto_completo.pdf$$yVersión publicada 000101623 8564_ $$s2337391$$uhttps://zaguan.unizar.es/record/101623/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000101623 909CO $$ooai:zaguan.unizar.es:101623$$particulos$$pdriver 000101623 951__ $$a2023-05-18-14:10:11 000101623 980__ $$aARTICLE