Nocturnal surface ozone enhancement over Portugal during winter: Influence of different atmospheric conditions

Handle URI:
http://hdl.handle.net/10754/622225
Title:
Nocturnal surface ozone enhancement over Portugal during winter: Influence of different atmospheric conditions
Authors:
Kulkarni, Pavan S.; Dasari, Hari Prasad ( 0000-0003-0628-4481 ) ; Sharma, Ashish; Bortoli, D.; Salgado, Rui; Silva, A.M.
Abstract:
Four distinct nocturnal surface ozone (NSO) enhancement events were observed, with NSO concentration exceeding 80μg/m3, at multiple ozone (O3) monitoring stations (32 sites) in January, November and December between year 2000–2010, in Portugal. The reasonable explanation for the observed bimodal pattern of surface ozone with enhanced NSO concentration during nighttime has to be transport processes, as the surface ozone production ceases at nighttime. Simultaneous measurements of O3 at multiple stations during the study period in Portugal suggest that horizontal advection alone cannot explain the observed NSO enhancement. Thus, detailed analysis of the atmospheric conditions, simulated with the Weather Research and Forecasting (WRF) model, were performed to evaluate the atmospheric mechanisms responsible for NSO enhancement in the region. Simulations revealed that each event occurred as a result of one or the combination of different atmospheric processes such as, passage of a cold front followed by a subsidence zone; passage of a moving surface trough, with associated strong horizontal wind speed and vertical shear; combination of vertical and horizontal transport at the synoptic scale; formation of a low level jet with associated vertical mixing below the jet stream. The study confirmed that large-scale flow pattern resulting in enhanced vertical mixing in the nocturnal boundary layer, plays a key role in the NSO enhancement events, which frequently occur over Portugal during winter months. © 2016 Elsevier Ltd
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Kulkarni PS, Dasari HP, Sharma A, Bortoli D, Salgado R, et al. (2016) Nocturnal surface ozone enhancement over Portugal during winter: Influence of different atmospheric conditions. Atmospheric Environment 147: 109–120. Available: http://dx.doi.org/10.1016/j.atmosenv.2016.09.056.
Publisher:
Elsevier BV
Journal:
Atmospheric Environment
Issue Date:
24-Sep-2016
DOI:
10.1016/j.atmosenv.2016.09.056
Type:
Article
ISSN:
1352-2310
Sponsors:
The first author (Pavan S Kulkarni) is thankful to Fundação para a Ciência e a Tecnologia for the grant SFRH/BPD/82033/2011. The paper was partially funded through FEDER (ProgramaOperacionalFactores de Competitividade – COMPETE) and National funding through FCT – Fundação para a Ciência e a Tecnologia in the framework of project FCOMP-01-0124-FEDER-014024 (Refa. FCT PTDC/AAC-CLI/114031/2009).The work is co-funded by the European Union through the European Regional Development Fund, included in the COMPETE 2020 (Operational Program Competitiveness and Internationalization) through the ICT project (UID/GEO/04683/2013) with the reference POCI-01-0145-FEDER-007690. Ashish Sharma was supported by National Science Foundation (NSF) grant number: AGS 0934592, the Notre Dame Environmental Change Initiative and the Center for Sustainable Energy. Authors are thankful to APA (http://qualar.apambiente.pt/) for ozone data, IPMA for meteorological data and NCEP, USA for NNRP/FNL reanalysis data.
Additional Links:
http://www.sciencedirect.com/science/article/pii/S1352231016307749
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorKulkarni, Pavan S.en
dc.contributor.authorDasari, Hari Prasaden
dc.contributor.authorSharma, Ashishen
dc.contributor.authorBortoli, D.en
dc.contributor.authorSalgado, Ruien
dc.contributor.authorSilva, A.M.en
dc.date.accessioned2017-01-02T08:42:38Z-
dc.date.available2017-01-02T08:42:38Z-
dc.date.issued2016-09-24en
dc.identifier.citationKulkarni PS, Dasari HP, Sharma A, Bortoli D, Salgado R, et al. (2016) Nocturnal surface ozone enhancement over Portugal during winter: Influence of different atmospheric conditions. Atmospheric Environment 147: 109–120. Available: http://dx.doi.org/10.1016/j.atmosenv.2016.09.056.en
dc.identifier.issn1352-2310en
dc.identifier.doi10.1016/j.atmosenv.2016.09.056en
dc.identifier.urihttp://hdl.handle.net/10754/622225-
dc.description.abstractFour distinct nocturnal surface ozone (NSO) enhancement events were observed, with NSO concentration exceeding 80μg/m3, at multiple ozone (O3) monitoring stations (32 sites) in January, November and December between year 2000–2010, in Portugal. The reasonable explanation for the observed bimodal pattern of surface ozone with enhanced NSO concentration during nighttime has to be transport processes, as the surface ozone production ceases at nighttime. Simultaneous measurements of O3 at multiple stations during the study period in Portugal suggest that horizontal advection alone cannot explain the observed NSO enhancement. Thus, detailed analysis of the atmospheric conditions, simulated with the Weather Research and Forecasting (WRF) model, were performed to evaluate the atmospheric mechanisms responsible for NSO enhancement in the region. Simulations revealed that each event occurred as a result of one or the combination of different atmospheric processes such as, passage of a cold front followed by a subsidence zone; passage of a moving surface trough, with associated strong horizontal wind speed and vertical shear; combination of vertical and horizontal transport at the synoptic scale; formation of a low level jet with associated vertical mixing below the jet stream. The study confirmed that large-scale flow pattern resulting in enhanced vertical mixing in the nocturnal boundary layer, plays a key role in the NSO enhancement events, which frequently occur over Portugal during winter months. © 2016 Elsevier Ltden
dc.description.sponsorshipThe first author (Pavan S Kulkarni) is thankful to Fundação para a Ciência e a Tecnologia for the grant SFRH/BPD/82033/2011. The paper was partially funded through FEDER (ProgramaOperacionalFactores de Competitividade – COMPETE) and National funding through FCT – Fundação para a Ciência e a Tecnologia in the framework of project FCOMP-01-0124-FEDER-014024 (Refa. FCT PTDC/AAC-CLI/114031/2009).The work is co-funded by the European Union through the European Regional Development Fund, included in the COMPETE 2020 (Operational Program Competitiveness and Internationalization) through the ICT project (UID/GEO/04683/2013) with the reference POCI-01-0145-FEDER-007690. Ashish Sharma was supported by National Science Foundation (NSF) grant number: AGS 0934592, the Notre Dame Environmental Change Initiative and the Center for Sustainable Energy. Authors are thankful to APA (http://qualar.apambiente.pt/) for ozone data, IPMA for meteorological data and NCEP, USA for NNRP/FNL reanalysis data.en
dc.publisherElsevier BVen
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S1352231016307749en
dc.subjectLow-level jeten
dc.subjectNSO enhancementen
dc.subjectVertical mixingen
dc.subjectWRF modelen
dc.titleNocturnal surface ozone enhancement over Portugal during winter: Influence of different atmospheric conditionsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalAtmospheric Environmenten
dc.contributor.institutionInstituto de Ciências da Terra (ICT), University of Évora, Évora, Portugalen
dc.contributor.institutionDepartment of Civil & Environmental Engineering and Earth Sciences (CEEES), University of Notre DameIN, United Statesen
dc.contributor.institutionEnvironmental Change Initiative (ECI), University of Notre DameIN, United Statesen
dc.contributor.institutionInstitute for Atmospheric Science and Climate (ISAC-CNR), Bologna, Italyen
dc.contributor.institutionDepartment of Physics, University of Évora, Évora, Portugalen
kaust.authorDasari, Hari Prasaden
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