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| Titel |
Do low-frequency climate patterns affect chemical deposition in the NE coast of the Iberian Peninsula? |
| VerfasserIn |
Anna Avila, Rebeca Izquierdo, Marta Alarcón |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250076737
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| Zusammenfassung |
| Atmospheric deposition to land and aquatic surfaces depends on the atmospheric gas/aerosol
loads and on precipitation amount (which is a major vehicle for scavenging and depositing
atmospheric material). Climate variability patterns (NAO, WO and WeMO) have been found
to affect precipitation quantity in the Mediterranean fringe of the Iberian Peninsula, and this
can have an influence on precipitation chemistry and the deposition of atmospheric elements.
Also the air mass flow imposed by these teleconnections can influence the frequency of
transport from different sources which have different emission characteristics (predominance
of natural emissions or anthropogenic pollutants). Thus, modifications in the wind circulation
and precipitation patterns related to these climate variability modes can determine
the chemistry of precipitation and the atmospheric deposition loads of different
elements.
Here we analyse the effect of NAO, WO and WeMO climatic variability patterns on
precipitation amount and atmospheric deposition of major elements (Na, Ca, Mg, K, NH4,
NO3, SO4, Cl and alkalinity) in Catalonia (NE Spain) where precipitation chemistry has been
analyzed at 5 sites for periods of 16 - 25 years. The purpose of this work is to analyze to
which extent the amount of precipitation and of chemical deposition is determined by the
aforementioned climate variability modes. |
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