000070927 001__ 70927
000070927 005__ 20191127155454.0
000070927 0247_ $$2doi$$a10.5194/acp-18-6511-2018
000070927 0248_ $$2sideral$$a106464
000070927 037__ $$aART-2018-106464
000070927 041__ $$aeng
000070927 100__ $$aQuerol, X.
000070927 245__ $$aPhenomenology of summer ozone episodes over the Madrid Metropolitan Area, central Spain
000070927 260__ $$c2018
000070927 5060_ $$aAccess copy available to the general public$$fUnrestricted
000070927 5203_ $$aVarious studies have reported that the photochemical nucleation of new ultrafine particles (UFPs) in urban environments within high insolation regions occurs simultaneously with high ground ozone (O3) levels. In this work, we evaluate the atmospheric dynamics leading to summer O3 episodes in the Madrid air basin (central Iberia) by means of measuring a 3-D distribution of concentrations for both pollutants. To this end, we obtained vertical profiles (up to 1200m above ground level) using tethered balloons and miniaturised instrumentation at a suburban site located to the SW of the Madrid Metropolitan Area (MMA), the Majadahonda site (MJDH), in July 2016. Simultaneously, measurements of an extensive number of air quality and meteorological parameters were carried out at three supersites across the MMA. Furthermore, data from O3 soundings and daily radio soundings were also used to interpret atmospheric dynamics. The results demonstrate the concatenation of venting and accumulation episodes, with relative lows (venting) and peaks (accumulation) in O3 surface levels. Regardless of the episode type, the fumigation of high-altitude O3 (arising from a variety of origins) contributes the major proportion of surface O3 concentrations. Accumulation episodes are characterised by a relatively thinner planetary boundary layer (< 1500m at midday, lower in altitude than the orographic features), light synoptic winds, and the development of mountain breezes along the slopes of the Guadarrama Mountain Range (located W and NW of the MMA, with a maximum elevation of > 2400ma.s.l.). This orographic-meteorological setting causes the vertical recirculation of air masses and enrichment of O3 in the lower tropospheric layers. When the highly polluted urban plume from Madrid is affected by these dynamics, the highest Ox (O3CNO2) concentrations are recorded in the MMA. Vertical O3 profiles during venting episodes, with strong synoptic winds and a deepening of the planetary boundary layer reaching > 2000ma.s.l., were characterised by an upward gradient in O3 levels, whereas a reverse situation with O3 concentration maxima at lower levels was found during the accumulation episodes due to local and/or regional production. The two contributions to O3 surface levels (fumigation from high-altitude strata, a high O3 background, and/or regional production) require very different approaches for policy actions. In contrast to O3 vertical top-down transfer, UFPs are formed in the planetary boundary layer (PBL) and are transferred upwards progressively with the increase in PBL growth.
000070927 536__ $$9info:eu-repo/grantAgreement/ES/MEC/CAS17-00108$$9info:eu-repo/grantAgreement/ES/MINECO/PROACLIM/CGL2014-52877-R$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/CGL2016-78594-R$$9info:eu-repo/grantAgreement/ES/UZ/CUD2016-05
000070927 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000070927 590__ $$a5.668$$b2018
000070927 591__ $$aMETEOROLOGY & ATMOSPHERIC SCIENCES$$b8 / 86 = 0.093$$c2018$$dQ1$$eT1
000070927 591__ $$aENVIRONMENTAL SCIENCES$$b26 / 250 = 0.104$$c2018$$dQ1$$eT1
000070927 592__ $$a2.938$$b2018
000070927 593__ $$aAtmospheric Science$$c2018$$dQ1
000070927 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000070927 700__ $$aAlastuey, A.
000070927 700__ $$aGangoiti, G.
000070927 700__ $$aPerez, N.
000070927 700__ $$aLee, H.K.
000070927 700__ $$aEun, H.R.
000070927 700__ $$aPark, Y.
000070927 700__ $$aMantilla, E.
000070927 700__ $$0(orcid)0000-0001-8227-5689$$aEscudero, M.
000070927 700__ $$aTitos, G.
000070927 700__ $$aAlonso, L.
000070927 700__ $$aTemime-Roussel, B.
000070927 700__ $$aMarchand, N.
000070927 700__ $$aMoreta, J.R.
000070927 700__ $$aRevuelta, M.A.
000070927 700__ $$aSalvador, P.
000070927 700__ $$aArtíñano, B.
000070927 700__ $$aDos Santos, S.G.
000070927 700__ $$aAnguas, M.
000070927 700__ $$aNotario, A.
000070927 700__ $$aSaiz-Lopez, A.
000070927 700__ $$aHarrison, R.M.
000070927 700__ $$aMillán, M.
000070927 700__ $$aAhn, K.-H.
000070927 773__ $$g18, 9 (2018), 6511-6533$$pAtmos. chem. phys.$$tAtmospheric Chemistry and Physics$$x1680-7316
000070927 8564_ $$s4744829$$uhttps://zaguan.unizar.es/record/70927/files/texto_completo.pdf$$yVersión publicada
000070927 8564_ $$s107307$$uhttps://zaguan.unizar.es/record/70927/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000070927 909CO $$ooai:zaguan.unizar.es:70927$$particulos$$pdriver
000070927 951__ $$a2019-11-27-15:46:28
000070927 980__ $$aARTICLE