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Atmospheric fluxes of ²¹⁰Pb to the western Mediterranean Sea and the Saharan dust influence
Garcia i 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 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)

Date: 2006
Abstract: 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.
Note: Número d'acord de subvenció EC/FP5/EVK3-2000-00604
Note: Número d'acord de subvenció MCYT/REN2002-11267-E/MAR
Note: Número d'acord de subvenció MCYT/REN2001-0659/CLI
Rights: Tots els drets reservats
Language: Anglès.
Document: article ; recerca ; publishedVersion
Subject: Pb 210 ; Atmospheric fluxes ; Mediterranean Sea ; Sahara ; Dust
Published in: 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

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Institut de Ciència i Tecnologia Ambientals (ICTA)
Articles > Research articles
Articles > Published articles

 Record created 2015-04-14, last modified 2019-02-04



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