The chemical and physical characterization of aerosols -focusing on African dust and anthropogenic-derived particles- and the study of their seasonal variation are essential to understand their impact on the environment. Gu�nica's Dry Forest (GDF) is an excellent example of dry forest life zone. Samples were collected in GDF during day and nighttime using stacked-filter units. Analyses were performed using thermal/optical analysis for total carbon and ion chromatography for the water-soluble ions. Preliminary results, in the presence and absence of dust, showed that nighttime samples had two times higher concentrations of total carbon than the daytime ones. Nighttime samples also showed an increase in nss-SO42- and NH4+ in presence of dust. The main difference between the periods was the increase of nss-Ca2+ and Mg2+ in the presence of African dust. Results about the positive artifact and a more complete chemical characterization will be presented at the meeting.

Chemical characterization of atmospheric particles from different sources in the Gu[aacute]nica's Dry Forest: Inorganic and organic fraction

243rd National Meeting (2012)

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