7 documents found, page 1 of 1

Therapeutic respiratory and functional rehabilitation protocol for intensive ca...

Can artificial neural networks be used to predict the origin of ozone episodes?

Tropospheric ozone is a secondary pollutant having a negative impact on health and environment. To control and minimize such impact the European Community established regulations to promote a clean air all over Europe. However, when an episode is related with natural mechanisms as Stratosphere–Troposphere Exchanges (STE), the benefits of an action plan to minimize precursor emissions are inefficient. Therefore,...

Learning from 24 years of ozone data in Portugal

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 c...

Influence of topography and land use on pollutants dispersion in the Atlantic c...

The west coast of Iberian Peninsula, surrounded by the Atlantic Ocean, is characterised by complex topography and specific synoptical situations that imply mesoscale circulations development. The main purpose of this work is to analyse how mesoscale circulations induced by topography and/or land use control pollutants dispersion in a coastal region. A numerical system combining the MM5 meteorological model and ...

A winter ozone episode over Portugal

Stratozon: o ozono estratosférico na baixa troposfera sobre Portugal

Supported by Science and Technology Foundation, the STRATOZON project is a 2 years national project and is being developed by Fernando Pessoa and Aveiro Universities, in collaboration with the Meteorological Institute and the Environmental Institute. The main scope of STRATOZON project is to justify non-photochemical ozone episodes, and such, episodes that cannot be controlled by local/regional management of it...

Ozone deposition modelling in a portuguese coastal zone

The deposition of pollutants from the atmosphere to ecosystems is the cause of some present environmental problems: acidification, eutrophication and, indirectly, ground level ozone. Related with these issues is the critical loads/levels concept, widely accepted in Europe as basis for pollution control strategies. The knowledge of atmospheric pollutants deposition on ecosystems is needed to setup this methodolo...