Effects of teleconnection patterns on the atmospheric routes, precipitation and deposition amounts in the north-eastern Iberian Peninsula
Izquierdo Miguel, Rebeca (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Alarcón Jordán, Marta, 1958- (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear)
Aguillaume Rodríguez-O'connor, Laura (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Àvila i Castells, Anna (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Data:	2014
Resum:	The North Atlantic Oscillation (NAO) has been identified as one of the atmospheric patterns which mostly influence the temporal evolution of precipitation and temperature in the Mediterranean area. Recently, the Western Mediterranean Oscillation (WeMO) has also been proposed to describe the precipitation variability in the eastern Iberian Peninsula. This paper examines whether the chemical signature and/or the chemical deposition amounts recorded over NE Iberian Peninsula are influenced by these climatic variability patterns. Results show a more relevant role of the WeMO compared to NAO in the deposition of either marine (Cl⁻, Na⁺, Mg²⁺) or anthropogenic pollutants (H⁺, NH⁺/4, NO-/3 and SO2/4−). A cluster classification of provenances indicated that in winter (December to March) fast Atlantic air flows correspond to positive WeMO indices, while negative WeMOi are associated to Northeastern and Southwestern circulations. The negative phase of WeMO causes the entry of air masses from the Mediterranean into the Iberian Peninsula, that are enriched with marine ions and ions of anthropogenic origin (NH⁺/4, NO-/3 and SO2/4−). For these later, this suggests the advection over the Mediterranean of polluted air masses from southern Europe and the scavenging and deposition of this pollution by precipitation during the WeMO negative phases. This will carry transboundary pollutants to the NE Iberian Peninsula. However, local pollutants may also contribute, as precipitation events from the Mediterranean and the Atlantic (associated to both WeMO phases) may incorporate emissions that accumulate locally during the winter anticyclonic episodes typical of the region.
Ajuts:	Ministerio de Economía y Competitividad CGL2012-39523-C02-02 Ministerio de Ciencia e Innovación CGL2009-13188-C03-01 Ministerio de Ciencia e Innovación CGL2009-11205 Ministerio de Ciencia e Innovación CSD2008-00040 Ministerio de Economía y Competitividad CSD2007-00067
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Back-trajectories ; Deposition ; NAO ; Precipitation chemistry ; WeMO ; West Mediterranean
Publicat a:	Atmospheric environment, Vol. 89 (June 2014) , p. 482-490, ISSN 1352-2310

DOI: 10.1016/j.atmosenv.2014.02.057

Post-print 26 p, 934.4 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
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