Learning from 24 years of ozone data in Portugal

Nuno Barros, M. P. Silva, T. Fontes, M. C. Manso, A. C. Carvalho

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ozone (O3) is a secondary pollutant mainly produced in the troposphere by photochemical reactions with high impact on human health. In this work hourly average O3 concentrations from the Portuguese air quality network collected during 24 years (1988–2011) were analysed. The background time series were assessed by environment type (urban, suburban and rural) and considering several criteria: the annual mean O3 concentration, the Directive 2008/50/EC O3 long-term objective and the 2005 WHO Guideline for protection of human health and, finally, the hourly information threshold exceedances. The trend of annual mean O3 concentration data and the maximum daily eight-hour mean ozone concentration data were both annually compared using an one-way ANOVA followed by a Tamhane post-hoc comparison test. In both series, although of an instable trend, a tendency for an increase of the mean O3 concentrations was found. On the other hand, after 2006, for all stations types, the normalized number of exceedances for public O3 information are significantly decreasing (p<0.05). In this paper, the O3 trend will be analyzed and discussed, contributing to improve knowledge of long time series of O3 concentrations in Portugal.

Original languageEnglish
Title of host publicationWIT Transactions on Ecology and the Environment
PublisherWITPress
Pages117-128
Number of pages12
Volume183
ISBN (Electronic)978-184564782-7
DOIs
Publication statusPublished - 7 Jul 2014
Event22nd International Conference on Modelling, Monitoring and Management of Air Pollution, AIR 2014 - Opatija, Croatia
Duration: 7 Jul 20149 Jul 2014

Conference

Conference22nd International Conference on Modelling, Monitoring and Management of Air Pollution, AIR 2014
CountryCroatia
CityOpatija
Period7/07/149/07/14

Fingerprint

learning
ozone
time series
troposphere
air quality
pollutant
trend
human health
test
directive
photochemical reaction
station
public information
comparison

Keywords

  • Background stations
  • Exceedances
  • Time series
  • Trends
  • Tropospheric ozone

Cite this

Barros, N., Silva, M. P., Fontes, T., Manso, M. C., & Carvalho, A. C. (2014). Learning from 24 years of ozone data in Portugal. In WIT Transactions on Ecology and the Environment (Vol. 183, pp. 117-128). WITPress. https://doi.org/10.2495/AIR140101
Barros, Nuno ; Silva, M. P. ; Fontes, T. ; Manso, M. C. ; Carvalho, A. C. / Learning from 24 years of ozone data in Portugal. WIT Transactions on Ecology and the Environment. Vol. 183 WITPress, 2014. pp. 117-128
@inproceedings{4f5c832300a541469786dd1eebaf1bd7,
title = "Learning from 24 years of ozone data in Portugal",
abstract = "Ozone (O3) is a secondary pollutant mainly produced in the troposphere by photochemical reactions with high impact on human health. In this work hourly average O3 concentrations from the Portuguese air quality network collected during 24 years (1988–2011) were analysed. The background time series were assessed by environment type (urban, suburban and rural) and considering several criteria: the annual mean O3 concentration, the Directive 2008/50/EC O3 long-term objective and the 2005 WHO Guideline for protection of human health and, finally, the hourly information threshold exceedances. The trend of annual mean O3 concentration data and the maximum daily eight-hour mean ozone concentration data were both annually compared using an one-way ANOVA followed by a Tamhane post-hoc comparison test. In both series, although of an instable trend, a tendency for an increase of the mean O3 concentrations was found. On the other hand, after 2006, for all stations types, the normalized number of exceedances for public O3 information are significantly decreasing (p<0.05). In this paper, the O3 trend will be analyzed and discussed, contributing to improve knowledge of long time series of O3 concentrations in Portugal.",
keywords = "Background stations, Exceedances, Time series, Trends, Tropospheric ozone",
author = "Nuno Barros and Silva, {M. P.} and T. Fontes and Manso, {M. C.} and Carvalho, {A. C.}",
note = "sem pdf conforme despacho.",
year = "2014",
month = "7",
day = "7",
doi = "10.2495/AIR140101",
language = "English",
volume = "183",
pages = "117--128",
booktitle = "WIT Transactions on Ecology and the Environment",
publisher = "WITPress",

}

Barros, N, Silva, MP, Fontes, T, Manso, MC & Carvalho, AC 2014, Learning from 24 years of ozone data in Portugal. in WIT Transactions on Ecology and the Environment. vol. 183, WITPress, pp. 117-128, 22nd International Conference on Modelling, Monitoring and Management of Air Pollution, AIR 2014, Opatija, Croatia, 7/07/14. https://doi.org/10.2495/AIR140101

Learning from 24 years of ozone data in Portugal. / Barros, Nuno; Silva, M. P.; Fontes, T.; Manso, M. C.; Carvalho, A. C.

WIT Transactions on Ecology and the Environment. Vol. 183 WITPress, 2014. p. 117-128.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Learning from 24 years of ozone data in Portugal

AU - Barros, Nuno

AU - Silva, M. P.

AU - Fontes, T.

AU - Manso, M. C.

AU - Carvalho, A. C.

N1 - sem pdf conforme despacho.

PY - 2014/7/7

Y1 - 2014/7/7

N2 - Ozone (O3) is a secondary pollutant mainly produced in the troposphere by photochemical reactions with high impact on human health. In this work hourly average O3 concentrations from the Portuguese air quality network collected during 24 years (1988–2011) were analysed. The background time series were assessed by environment type (urban, suburban and rural) and considering several criteria: the annual mean O3 concentration, the Directive 2008/50/EC O3 long-term objective and the 2005 WHO Guideline for protection of human health and, finally, the hourly information threshold exceedances. The trend of annual mean O3 concentration data and the maximum daily eight-hour mean ozone concentration data were both annually compared using an one-way ANOVA followed by a Tamhane post-hoc comparison test. In both series, although of an instable trend, a tendency for an increase of the mean O3 concentrations was found. On the other hand, after 2006, for all stations types, the normalized number of exceedances for public O3 information are significantly decreasing (p<0.05). In this paper, the O3 trend will be analyzed and discussed, contributing to improve knowledge of long time series of O3 concentrations in Portugal.

AB - Ozone (O3) is a secondary pollutant mainly produced in the troposphere by photochemical reactions with high impact on human health. In this work hourly average O3 concentrations from the Portuguese air quality network collected during 24 years (1988–2011) were analysed. The background time series were assessed by environment type (urban, suburban and rural) and considering several criteria: the annual mean O3 concentration, the Directive 2008/50/EC O3 long-term objective and the 2005 WHO Guideline for protection of human health and, finally, the hourly information threshold exceedances. The trend of annual mean O3 concentration data and the maximum daily eight-hour mean ozone concentration data were both annually compared using an one-way ANOVA followed by a Tamhane post-hoc comparison test. In both series, although of an instable trend, a tendency for an increase of the mean O3 concentrations was found. On the other hand, after 2006, for all stations types, the normalized number of exceedances for public O3 information are significantly decreasing (p<0.05). In this paper, the O3 trend will be analyzed and discussed, contributing to improve knowledge of long time series of O3 concentrations in Portugal.

KW - Background stations

KW - Exceedances

KW - Time series

KW - Trends

KW - Tropospheric ozone

UR - http://www.scopus.com/inward/record.url?scp=84930350029&partnerID=8YFLogxK

U2 - 10.2495/AIR140101

DO - 10.2495/AIR140101

M3 - Conference contribution

VL - 183

SP - 117

EP - 128

BT - WIT Transactions on Ecology and the Environment

PB - WITPress

ER -

Barros N, Silva MP, Fontes T, Manso MC, Carvalho AC. Learning from 24 years of ozone data in Portugal. In WIT Transactions on Ecology and the Environment. Vol. 183. WITPress. 2014. p. 117-128 https://doi.org/10.2495/AIR140101