How healthy will be the air quality in 2050?
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The air quality standards defined by the World Health Organization (WHO), and updated in 2005, continue to be much more exigent than current EU legislation, namely regarding the most critical pollutants over Europe: ozone (O3) and particulate matter (PM10 and PM2.5). This work intends to evaluate the fulfilment of these WHO standards in the present and in the future, including climate change effects. This study will be focused on Portugal, where each year, the O3 and PM10 concentrations exceed the legislated limit values. For this, regional air quality simulations for present and future periods were conducted, with CAMx version 6.0, to investigate the impacts of climate change and anthropogenic emission projections on air quality over Portugal in 2050. The climate and emission projections for 2050 were derived from the Representative Concentrations Pathway 8.5 scenario. Modelling results show that, over Portugal, the WHO standards are already not being fulfilled and will continue to be surpassed in the future. When considering climate change and projected anthropogenic emissions and comparing them to the actual scenario, a reduction in the maximum 8-h daily O3 concentration is expected. For PM, the results indicate serious problems regarding the health impact expected for both long-term and short-term exposure. The annual averages for both PM10 and PM2.5 exceed the AQG over the country. The PM short-term exposure is already very high for current conditions and higher impacts are expected for future scenario, in particular regarding the PM10 values. This air quality degradation is caused by the warmer and dryer conditions and the increase of background concentrations of pollutants expected for the 2050 climate. The results evidence that human health protection will be even more critical in the future, particularly for particulate matter. Furthermore, urgent air quality management strategies need to be designed, with transboundary cooperation and implementation.
KeywordsAir quality WHO guidelines Human health effects Future scenarios Emission projection Climate projections
The authors wish to thank the financial support of FEDER through the COMPETE Programme and the national funds from FCT–Science and Technology Portuguese Foundation for financing the AIRSHIP project (PTDC/AAG-MAA/1581/2014; POCI-01-0145-FEDER-016708), DOUROZONE project (PTDC/AAG-MAA/3335/2014; POCI-01-0145-FEDER-016778) and the Ph.D. grants of A. Fernandes (SFRH/BD/86307/2012) and C. Gama (SFRH/BD/87468/2012). Thanks are also due, for the financial support to CESAM (UID/AMB/50017), to FCT/MEC through national funds, and the co-funding by the FEDER, within the PT2020 Partnership Agreement and Compete 2020.
- APA (Portuguese Environmental Agency) (2014) Portuguese informative inventory report 1990–2012. Submitted under the UNECE convention on long-range transboundary air pollution. Agência Portuguesa do Ambiente (Ed.), Amadora, Portugal, March 2014Google Scholar
- Doherty RM, Wild O, Shindell DT, Zeng G, MacKenzie IA, Collins WJ, Fiore AM, Stevenson DS, Dentener FJ, Schultz MG, Hess P, Derwent RG, Keating TJ (2013) Impacts of climate change on surface ozone and intercontinental ozone pollution: a multi-model study. J Geophys Res 118:3744–3763Google Scholar
- Emmons LK, Walters S, Hess PG, Lamarque J-F, Pfister GG, Fillmore D, Granier C, Guenther A, Kinnison D, Laepple T, Orlando J, Tie X, Tyndall G, Wiedinmyer C, Baughcum SL, Kloster S (2010) Description and evaluation of the model for ozone and related chemical tracers, version 4 (MOZART-4). Geosci Model Dev 3:43–67CrossRefGoogle Scholar
- Martins H, Miranda A, Borrego C (2010) Atmospheric modelling under urban land use changes: meteorological and air quality consequences. 31st NATO/SPS International Technical Meeting on Air Pollution Modelling and its Application, 27 Sept -1 Oct, Torino, ItalyGoogle Scholar
- Morris RE, Yarwood G, Emery C, Koo B (2004) Development and application of the CAMx regional one-atmosphere model to treat ozone, particulate matter, visibility, air toxics and mercury. 97th Annual Conference and Exhibition of the A&WMA, June 2004, IndianapolisGoogle Scholar
- Stevenson D, Dentener F, Schultz M, Ellingsen K, van Noije T, Wild O, Zeng G, Amann M, Atherton C, Bell N, Bergmann D, Bey I, Butler T, Cofala J, Collins W, Derwent R, Doherty R, Drevet J, Eskes H, Fiore A, Gauss M, Hauglustaine D, Horowitz L, Isaksen I, Krol M, Lamarque J-F, Lawrence M, Montanaro V, Müller J-F, Pitari G, Prather M, Pyle J, Rast S, Rodriguez J, Sanderson M, Savage N, Shindell D, Strahan S, Sudo K, Szopa S (2006) Multimodel ensemble simulations of present-day and near-future tropospheric ozone. J Geophys Res 111:D08301CrossRefGoogle Scholar
- Szopa S, Balkanski Y, Schulz M, Bekki S, Cugnet D, Fortems-Cheiney A, Turquety S, Cozic A, Déandreis C, Hauglustaine D, Idelkadi A, Lathière J, Lefevre F, Marchand M, Vuolo R, Yan N, Dufresne J-L (2013) Aerosol and ozone changes as forcing for climate evolution between 1850 and 2100. Clim Dynam 40:2223–2250CrossRefGoogle Scholar
- WHO (World Health Organization) (2006) Air quality guidelines for particulate matter, ozone, nitrogen dioxide and sulfur dioxide: global update 2005, Copenhagen, 484 pagesGoogle Scholar
- Yarwood G, Rao S, Yocke M, Whitten G (2005) Updates to the carbon bond chemical mechanism: CB05. Final Report to the US EPA, RT-0400675Google Scholar