Ground Level Ozone Formation Near a Traffic Intersection: Lisbon “Rotunda De Entrecampos” Case Study

Angelo Roldão Soares, Duarte Neto, Tiago Avelino and Carla Silva
Additional contact information
Angelo Roldão Soares: Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1250-096 Lisboa, Portugal
Duarte Neto: MSc Energy and Environment, Faculdade de Ciências, Universidade de Lisboa, 1250-096 Lisboa, Portugal
Tiago Avelino: MSc Energy and Environment, Faculdade de Ciências, Universidade de Lisboa, 1250-096 Lisboa, Portugal
Carla Silva: Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1250-096 Lisboa, Portugal

Energies, 2020, vol. 13, issue 7, 1-17

Abstract: Ground-level ozone in cities is increasing mainly due to traffic exhaust aftertreatment devices, i.e., tailpipe catalytic converters. The chemical reaction of O 3 formation indicates radiation and nitrogen oxides as main players. Thus, we investigate correlations between O 3 , global radiation, nitrogen oxides, temperature, and precipitation in several periods of the year (2017) near a traffic roundabout in Lisbon city (coordinates 38°44’55’’ lat, −9°08’56’’ long). The weekend effect, school break versus school period, day and night, and seasonal effect were explored. Low-cost sensors (LCS) of O 3 , NO x, and temperature were tested to see if they can be used to get historical data on other cities and locations. The main innovation is the calibration of the sensor directly with real data (uncontrolled environment). Raw data were compared and led us to conclude that MQ-131 has a better performance than the MICS-4514 sensor. The results indicate that the diurnal cycle of ozone concentration has a mid-day peak around 1–2 pm and a lower nighttime concentration below 5 ppb Weekends and school break period (251 days a year) have the highest values of Ozone, this is due to lower NO x emissions and thus lower levels of ozone destruction reaction (NO x -titration reaction). August is a hotspot month with a maximum concentration of 71 ppb.

Keywords: global radiation; nitrogen oxides; low-cost sensors; weekend effect; seasonal effect (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/7/1562/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/7/1562/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:7:p:1562-:d:338026

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().