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Atmospheric fluxes of ²¹⁰Pb to the western Mediterranean Sea and the Saharan dust influence
Garcia-Orellana, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
Sánchez Cabeza, Joan Albert (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Masqué Barri, Pere (Universitat Autònoma de Barcelona. Departament de Física)
Àvila i Castells, Anna (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Costa, E. (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Loÿe-Pilot, M. D. (École Normale Supérieure (París, França))
Bruach Menchén, Joan Manuel (Universitat Autònoma de Barcelona. Departament de Física)

Fecha: 2006
Resumen: Pb 210 is a well known tracer of particle dynamics in the marine environment. Geochemical models partially rely on the knowledge of its atmospheric input. Unfortunately, this is poorly known in the western Mediterranean Sea, especially regarding long-term records. In this work we have evaluated the ²¹⁰Pb annual atmospheric flux to this region from the analysis of 12 soil cores collected from coastal and island sites and total atmospheric deposition collected in Corsica during 1 year. The ²¹⁰Pb fluxes ranged from 34 ± 3 to 121 ± 12 Bq m¯² yr¯¹ , with an average of 75 Bq m¯² yr¯¹, and were strongly correlated (R²= 0. 95) with mean annual rainfall. This provides the possibility to determine ²¹⁰Pb fluxes in a given location if the mean annual rainfall is well known, a useful outcome for both marine biogeochemical and soil erosion studies in this region. We have also estimated the mean annual atmospheric flux of ²¹⁰Pb due to Saharan dust events registered in total deposition north of Barcelona during the last 17 years, yielding a value of 20 Bq m¯² yr¯¹ . This flux represents a fraction of about 16% of the total atmospheric deposition of ²¹⁰Pb in this area, but it could be up to 50% in sites with lower rainfall.
Ayudas: European Commission EVK3-2000-00604
Ministerio de Ciencia y Tecnología REN2002-11267-E/MAR
Ministerio de Ciencia y Tecnología REN2001-0659/CLI
Derechos: Tots els drets reservats.
Lengua: Anglès
Documento: Article ; recerca ; Versió publicada
Materia: Pb 210 ; Atmospheric fluxes ; Mediterranean Sea ; Sahara ; Dust
Publicado en: Journal of geophysical research : atmospheres, Vol. 111, Issue D15 (August 2006) , p. D15305, ISSN 2169-897X

DOI: 10.1029/2005JD006660


9 p, 1.2 MB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Institut de Ciència i Tecnologia Ambientals (ICTA)
Artículos > Artículos de investigación
Artículos > Artículos publicados

 Registro creado el 2015-04-14, última modificación el 2022-09-04



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