Aula d’Ecologia. Cicle de conferències 2006.

Avila A, Terradas J (2007) Aula d’Ecologia. Cicle de conferències 2006. Servei de Publicacions Universitat Autònoma de Barcelona, Bellaterra. ISBN 978-490-2485-6.

Determination of the contribution of northern Africa dust source areas to PM10 concentrations over the central Iberian Penninsula using the Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT) model.

Escudero M, Stein A, Draxler R, Querol X, Alastuey A, Castillo S, Avila A (2006) Determination of the contribution of northern Africa dust source areas to PM10 concentrations over the central Iberian Penninsula using the Hybrid Single-Particle Lagrangian Integrated Trajectory model (HYSPLIT) model. Journal of Geophysical Research 111, DO6210, doi: 10.1029/2005JD006395,2006

Atmospheric fluxes of 210Pb to the Western Mediterranean Sea and the Saharan dust influence.

Garcia-Orellana J, Sanchez-CabezaJA, Masqué P, Àvila A, Costa E, Loÿe-Pilot MD, Bruach-Menchén JM (2006) Atmospheric fluxes of 210Pb to the Western Mediterranean Sea and the Saharan dust influence. Journal Geophysical Research, Vol. 111, D15305, doi:10.1029/2005JD006660.

Characteristics of African dust in red rains collected in North-eastern Spain from 1983 to 2002.

Avila A, Alarcón M, García-Orellana J, Masqué P, Castillo S, Escudero M, Querol X (2006) Characteristics of African dust in red rains collected in North-eastern Spain from 1983 to 2002. Geophysical Research Abstracts Vol 8, 04485.

Aula d'Ecologia. Cicle de conferències 2005.

Avila A, Terradas J (eds) (2006) Aula d'Ecologia. Cicle de conferències 2005. Servei de Publicacions, Universitat Autònoma de Barcelona. Bellaterra. ISBN: 84-490-2435-8.

Restauració de sòls degradats, p 76-74. Aula d’Ecologia: Cicle de conferències 2005.

Alcañiz JM (2006) Restauració de sòls degradats, p 76-74. Aula d’Ecologia: Cicle de conferències 2005. Col•lecció Ciència i Tècnica nº 32, Ecologia, Serveide Publicacions Universitat Autònoma de Barcelona, Bellaterra, ISBN 84-490-2435-8 (CL).

Characterisation of TSP and PM2.5 at Izaña and Sta. Cruz de Tenerife (Canary Islands, Spain) during a Saharan Dust Episode (July 2002)

Alastuey A., Querol X., Castillo S., Escudero M., Avila A., Cuevas E., Torres C., Romero P.-M., Exposito F., García O., Diaz J.P., Van Dingenen R., Putaud J.P. (2005) Characterisation of TSP and PM2.5 at Izaña and Sta. Cruz de Tenerife (Canary Islands, Spain) during a Saharan Dust Episode (July 2002). Atmospheric Environment. 39: 4715-4728.
Enllaç
Doi: 10.1016/j.atmosenv.2005.04.018

Resum:

A strong African dust outbreak episode affecting the Canary Islands from 28 to 31/07/02 has been characterised at the Izaña Observatory (IZO), located in the free troposphere (FT), and at Sta. Cruz de Tenerife (SCO), in the Marine Boundary Layer (MBL). The Saharan air mass intruded above the trade wind inversion layer resulting in daily mean PM levels of up to 616, 312, 98 and 26 μg m-3 of TSP, PM10, PM2.5 and PM1, respectively, at IZO. As demonstrated by the vertical sounding profiles, the MBL is compressed during the Saharan intrusion, favouring the deposition of coarse dust particles to the MBL and giving rise to daily levels of up to 85, 52 and 30 μg m-3 of PM10, PM2.5 and PM1, respectively, at SCO. A complete chemical and mineralogical characterisation has been performed for TSP and PM2.5 collected simultaneously at both sites. Levels of mineral elements increased during the Saharan episode at both sampling sites. In addition, at the MBL, the levels of the secondary inorganic aerosols registered during the Saharan episode were considerably higher than levels recorded during non-Saharan episodes. The partial formation of secondary coarse Ca and/or Na sulphates and nitrates by the reaction of gaseous pollutants (or derived oxidised phases), of a major local origin, with the natural aerosols has been deduced. These reactions may be favoured by the high concentration of coarse mineral and marine aerosols particles measured at SCO, the high relative humidity (RH) measured, as well as the strong compression of the MBL during the Saharan episode. © 2005 Elsevier Ltd. All rights reserved.

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La pluja de fang i la pols sahariana.

Avila A (2005) La pluja de fang i la pols sahariana. Alocs 7: 2-4.

Aula d’Ecologia. Cicle de conferències 2004.

Àvila A, Terradas J (eds) (2005) Aula d’Ecologia. Cicle de conferències 2004. Servei de Publicacions. Universitat Autònoma de Barcelona. Bellaterra. ISBN: 84-490-2393-9.

Wet and dry African dust episodes over eastern Spain

Escudero M., Castillo S., Querol X., Avila A., Alarcón M., Viana M.M., Alastuey A., Cuevas E., Rodríguez S. (2005) Wet and dry African dust episodes over eastern Spain. Journal of Geophysical Research D: Atmospheres. 110: 1-15.
Enllaç
Doi: 10.1029/2004JD004731

Resum:

The impact of the African dust on levels of atmospheric suspended particulate matter (SPM) and on wet deposition was evaluated in eastern Iberia for the period 1996-2002. An effort was made to compile both the SPM and wet episodes. To this end, the time series of levels of TSP and PM1O in Levantine air quality monitoring stations were evaluated and complemented with the computation of back trajectories, satellite images, and meteorological analysis. Wet deposition frequency was obtained from weekly collected precipitation data at a rural background station in which the African chemical signature was identified (mainly pH and Ca2+ concentrations). A number of African dust episodes (112) were identified (16 episodes per year). In 93 out of the 112 (13 episodes per year) the African dust influence caused high SPM levels. In 49 out of 112 (7 episodes per year), wet deposition was detected, and the chemistry was influenced by dust. There is a clear seasonal trend with higher frequency of dust outbreaks in May-August, with second modes in March and October. Wet events followed a different pattern, with a marked maximum in May. Except for one event, December was devoid of African air mass intrusions. On the basis of seasonal meteorological patterns affecting the Iberian Peninsula, an interpretation of the meteorological scenarios causing African dust transport over Iberia was carried out. Four scenarios were identified with a clear seasonal trend. The impact of the different dust outbreak scenarios on the levels of PM1O recorded at a rural site (Monagrega, Teruel, Spain) in the period 1996-2002 was also evaluated. Copyright 2005 by the American Geophysical Union.

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