Skip to Main content Skip to Navigation
Theses

Etude expérimentale des flux et des caractéristiques physiques des poussières sahariennes dans les régions proches du golfe de guinée

Abstract : The physical parameters that characterise the Saharan dust aerosol usually present in the environment near the Gulf of Guinea during the months of November to March, known locally as the Harmattan season, have been determined over a 7-year period, using Ghana as a reference geographical location. The dust particle size distributions are obtained and discussed. The dust flux and deposition rate are also estimated. Within the dust particle size range measured (0.5 ¤m ¤ 25 ¤m), the yearly average number and mass concentrations are found to vary from 24 to 63 particles per cm3 and 168 to 1331 ¤g m-3 respectively. The mean particle diameter is 1.47 ¤m. The annual dust deposition rate varies from 12.7 t/km2/y to 31.4 t/km2/y, corresponding to a ground dust layer thickness of 4.8 ¤m and 11.8 ¤m respectively
Document type :
Theses
Complete list of metadatas

https://tel.archives-ouvertes.fr/tel-00136301
Contributor : Toulon Scd <>
Submitted on : Tuesday, March 13, 2007 - 12:33:10 PM
Last modification on : Friday, October 23, 2020 - 4:52:36 PM
Long-term archiving on: : Friday, November 25, 2016 - 2:39:00 PM

Identifiers

  • HAL Id : tel-00136301, version 1

Collections

Citation

Albert Sunnu. Etude expérimentale des flux et des caractéristiques physiques des poussières sahariennes dans les régions proches du golfe de guinée. Océan, Atmosphère. Université du Sud Toulon Var, 2006. Français. ⟨tel-00136301⟩

Share

Metrics

Record views

266

Files downloads

734