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Ultrafine particle formation in the inland sea breeze airflow in Southwest Europe
Title: Ultrafine particle formation in the inland sea breeze airflow in Southwest Europe
Authors: Fernández Camacho, RocíoRodríguez González, Sergio ORCID RESEARCHERID Autor AEMETRosa Díaz, Jesús Damián de laSánchez de la Campa, A. M.Viana, MarAlastuey, AndrésQuerol, Xavier
Keywords: Ultrafine particles; Human health; Urban particles; Partículas; Calidad del aire
Issue Date: 2010
Publisher: European Geosciences Union
Citation: Atmospheric Chemistry and Physics. 2010, 10(19), p. 9615-9630
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Abstract: Studies on ultrafine particles (diameter < 100nm) and air quality have mostly focused on vehicle exhaust emissions and on new particle formation in "clean" ambient air. Here we present a study focused on the processes contributing to ultrafine particle concentrations in a city (Huelva, SW Spain) placed close to a coastal area where significant anthropogenic emissions of aerosol precursors occur. The overall data analysis shows that two processes predominantly contribute to the number of particles coarser than 2.5 nm: vehicle exhaust emissions and new particle formation due to photo-chemical activity. As typically occurs in urban areas, vehicle exhaust emissions result in high concentrations of black carbon (BC) and particles coarser than 2.5 nm (N) during the morning rush hours. The highest N concentrations were recorded during the 11:00–17:00 h period, under the sea breeze regime, when low BC concentrations were registered and photochemical activity resulted in high O3 levels and in new particle formation in the aerosol precursors' rich inland airflow. In this period, it is estimated that about 80% of the number of particles are linked to sulfur dioxide emissions. The contributions to N of "carbonaceous material and those compounds nucleating/condensing immediately after emission" and of the "new particle formation processes in air masses rich gaseous precursors (e.g. SO2)" were estimated by means of a relatively novel method based on simultaneous measurements of BC and N. A comparison with two recent studies suggests that the daily cycles of "new particle formation" during the inland sea breeze is blowing period seem to be a feature of ultrafine particles in coastal areas of South-west Europe.
Sponsorship : This study has been carried out within the framework of several research projects: AER-REG (P07-RNM- 03125; Department of Innovation, Science and Enterprise of the Andalusian Autonomous Government), GRACCIE (CSD2007- 00067; Ministry of Science and Innovation of Spain), SIMAND (P07- RNM-02729; Department of Innovation, Science and Enterprise of the Andalusian Autonomous Government) and EPAU (B026/2007/3-10.1; Ministry of Environment of Spain).
ISSN: 1680-7316
Appears in Collections:Artículos científicos 2010-2014

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