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Decadal trends in atmospheric deposition in a high elevation station: Effects of climate and pollution on the long-range flux of metals and trace elements over SW Europe

AuthorsCamarero, Lluís ; Bacardit, Montserrat ; de Diego, Alberto; Arana, Gorka
KeywordsClimate change
Anthropogenic emissions
Precipitation chemistry
Central Pyrenees
NAO index
Issue Date2017
CitationAtmospheric Environment 167 : 542-552 (2017)
AbstractAtmospheric deposition collected at remote, high elevation stations is representative of long-range transport of elements. Here we present time-series of Al, Fe, Ti, Mn, Zn, Ni, Cu, As, Cd and Pb deposition sampled in the Central Pyrenees at 2240 m a.s.l, representative of the fluxes of these elements over South West Europe. Trace element deposition did not show a simple trend. Rather, there was statistical evidence of several underlying factors governing the variability of the time-series recorded: seasonal cycles, trends, the effects of the amount of precipitation, climate-controlled export of dust, and changes in anthropogenic emissions. Overall, there were three main modes of variation in deposition. The first mode was related to North Atlantic Oscillation (NAO), and affected Al, Fe, Ti, Mn and Pb. We interpret this as changes in the dust export from Northern Africa under the different meteorological conditions that the NAO index indicates. The second mode was an upward trend related to a rise in the frequency of precipitation events (that also lead to an increase in the amount). More frequent events might cause a higher efficiency in the scavenging of aerosols. As, Cu and Ni responded to this. And finally, the third mode of variation was related to changes in anthropogenic emissions of Pb and Zn
DescriptionEste artículo contiene 11 páginas, 6 figuras, 3 tablas.
Publisher version (URL)https://doi.org/10.1016/j.atmosenv.2017.08.049
Appears in Collections:(CEAB) Artículos
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