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Present Transport and Deposition Patterns of African Dusts to the North-Western Mediterranean

  • G. Bergametti
  • L. Gomes
  • E. Remoudaki
  • M. Desbois
  • D. Martin
  • P. Buat-Ménard
Chapter
Part of the NATO ASI Series book series (ASIC, volume 282)

Abstract

The elements associated with mineral aerosol particles exhibit, in the Western Mediterranean, sporadic but intense concentration peaks. Twenty dust events were recorded during a one-year sampling period with their frequency being maximum in spring and summer. Three-dimensional air-mass trajectories as well as satellite imagery (Meteosat II) show that all these events are associated with transport of soil dust from Africa. Three principal source-regions have been distinguished by using air-mass trajectories. Each of them seems to be characterized also by the chemical composition of the dust collected in Corsica. Moreover, the emissions and transport of dust particles from these various source-regions were found to occur during different times of the year. This has been explained by the seasonal atmospheric circulation patterns over North Africa and the Western Mediterranean.

Finally, total deposition measurements show that such dust transport events control a large fraction of the yearly atmospheric deposition of mineral aerosol particles to the Western Mediterranean. One single deposition event of short duration was found to account for 30% of the total annual flux for elements such as Si and Al.

Keywords

Satellite Imagery Deposition Flux Dust Event Saharan Dust Subtropical Anticyclone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • G. Bergametti
    • 1
  • L. Gomes
    • 1
  • E. Remoudaki
    • 1
  • M. Desbois
    • 2
  • D. Martin
    • 3
  • P. Buat-Ménard
    • 4
  1. 1.Laboratoire de Physico-Chimie de l′Atmosphère UA CNRS 717Université Paris VIIParis Cedex 05France
  2. 2.Laboratoire de Météorologie DynamiqueEcole PolytechniquePalaiseauFrance
  3. 3.Etablissement d′Etudes et de Recherches MétéorologiquesCentre de Recherches en Physique de l′AtmosphèreMagny les HameauxFrance
  4. 4.Centre des Faibles RadioactivitésLaboratoire Mixte CNRS-CEAGif/Yvette CedexFrance

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