Aerosol Deposition in Balearic Islands as Overview of the deposition in the Western Mediterranean
- Autores: José Carlos Cerro Garrido, Sandra Caballero Domínguez, Carles Bujosa, José Andrés Alastuey Urós, Xavier Querol Carceller, Jorge Pey Betrán
- Localización: 2nd Iberian Meeting on Aerosol Science and Technology: Proceedings Book RICTA 2014 / coord. por Jordi Grifoll Taverna, Joan Rosell Llompart, 2014, ISBN 978-84-695-9978-5, págs. 15-19
- Idioma: inglés
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Resumen
Atmospheric deposition, as the last stage of the aerosol cycle, brings nutrients and pollutants to earth and sea surfaces. The quantification of deposition fluxes, their chemical characterization and the knowledge about the sources becomes necessary when analysing different ecosystem responses.
In the context of the ChArMEx (The Chemistry-Aerosol Mediterranean Experiment, https://charmex.lsce.ipsl.fr) initiative, a 2-year study on wet and dry deposition of atmospheric aerosols has been conducted at a regional background environment in Mallorca (Balearic Islands, western Mediterranean). From September 2010 to August 2012 weekly dry and wet deposition samples were collected. In addition, atmospheric particulate matter was regularly sampled in both PM10 and PM1 fractions, as well as gaseous pollutants and meteorological parameters were continuously registered. Deposition samples were subjected to different analytical procedures including quantification of deposition volumes and subsequent filtration on quartz fibre filters, determination of pH, and complete acidic digestion of filters. Solutions obtained were analysed by a number of techniques determining the concentrations of soluble and insoluble fractions of a number of species including typical mineral elements (Al, Ba, Ca, Mg, Mn, Sr, Ti), major marine components (Cl, Na, Mg), anthropogenic tracers (Cu, K, Mn, Ni, NO3-, NH4+, Pb, V, Zn), and some multiple-origin components such as SO42-. Episodic and seasonal patterns were assessed, and differences between wet and dry deposition, and their relation with specific scenarios were established.
Special attention has been paid to the deposition of phosphorous, nitrogen (as NH4+ and NO3-) and iron and their possible influence on the sea Chlorophyll concentration, detected by different satellites (www.globcolour.info).
A preliminary source exploration by means of Principal Component Analysis has been done. Wet deposition samples exhibit three sources: crustal, marine and mixed-anthropogenic, whereas dry deposition samples split the anthropogenic source in three different components: a Cu-Zn-Fe, a K-Ni-Pb and a NO3--NH4+.