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| Titel |
Determination of particle tracers released in forest fire events in the Mediterranean basin. Ayoraburning experiment. |
| VerfasserIn |
Elisa Garcia-Hurtado, Jorge Pey, Esther Borrás, Andrés Alastuey, Xavier Querol, V. Ramón Vallejo |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250052000
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| Zusammenfassung |
| In 2009 110,783ha of forested area were burned in Spain being 65,541 of them shrublands
and woodlands. Currently, the released emissions to the atmosphere during these wildfires are
also a current subject of study because of their influence in air quality and their
impact on the climatic system. Taking into account that: a) shrublands are the most
typical vegetation constituting current Mediterranean forest areas; b) this type of
vegetation favourable to enhance the combustion process (an important proportion
of the organic matter constituting these shrub-lands is die; d) the Mediterranean
ecosystem is highly vulnerable to forest fires, especially in summer when extreme
ambient conditions are recorded: high temperatures, dryness of soils and intense
breeze circulations. In this context, Ayoraburning experiment (see García-Hurtado
et al., 2011) was preformed with a number of objectives, in which the chemical
characterization of the main tracers released to the atmosphere during these events was a
priority.
To fulfil this purpose a number of instruments and analytical techniques were used
including: high-volume samplers to collect TSP, PM10 and PM2.5 samples, an ultrafine
particle counter, an optical counter to determine TSP, PM10, PM2.5 and PM1 concentrations,
gaseous pollutants analyzers (CO2, CO, CH4, SO2, NOx), cartridges to capture VOC’s,
carbonylic and hydroxycarboxylic compounds. With respect to the analytical techniques
used, different treatments were applied: a) acid digestion of filters and subsequent analysis by
ICP-AES and ICP-MS were used to determine inorganic elements (Querol et al., 2008); b)
ionic chromatography was applied to determine inorganic soluble species; c) a
thermo-optic method was used to discriminate the organic and elemental carbon; and
standardized methodologies to quantify VOC’s, carbonylic and hydroxycarboxylic
compounds.
Among hundred of elements and compounds analyzed and determined, these has been
recognized as biomarkers in particulate form: Potassium, Sulphur, Levoglucosan,
Palmitic acid, Glutaric acid, Phthalic acid, Cresol, Butanone, Pentanone, Pirene
and Fluoranteno. In the gaseous phase we have identified the followings: Palmitic
acid, Glutaric acid, Phthalic acid, Glyoxal, Methylglyoxal, Limonene and a-Pinene. |
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