GuidiL, Texas A&M University/Université Pierre et Marie Curie-Paris6, College Station, USA, lguidi@obs-vlfr.fr
Stemmann, L, , Université Pierre et Marie Curie-Paris6, UMR 7093, Laboratoire d'Océanographie de Villefranche, Villefranche sur Mer, France, stemmann@obs-vlfr.fr
Jackson, G, , Texas A&M University, College Station, USA, jackson@halodule.tamu.edu
Picheral, M, , Université Pierre et Marie Curie-Paris6, UMR 7093, Laboratoire d'Océanographie de Villefranche, Villefranche sur Mer, France, picheral@obs-vlfr.fr
Legendre, L, , Laboratoire d’Océanographie de Villefranche, Villefranche sur Mer, France, legendre@obs-vlfr.fr
Gorsky, G, , Laboratoire d’Océanographie de Villefranche, Villefranche sur Mer, France, gorsky@obs-vlfr.fr
 
CHARACTERIZATION OF PARTICULATE MATTER (PM >100 µm) DISTRIBUTION IN THE OCEANS (Abstract ID: 786)
The vertical flux of organic particulate matter (PM) to the deep ocean is dominated by large particles, which are also essential for supplying food to the ocean interior and bottom. From sediment trap data, vertical fluxes have been described in the literature as decreasing with depth following a power law. Our observations of PM vertical distributions support this general trend, but show that a more complex pattern exists in the oceans. We collected more than 1300 PM vertical profiles in different oceans using a non-destructive imaging method, called the Underwater Video Profiler. We estimated PM size distribution, total mass and vertical flux. Using these parameters and biological and physical characteristics of the water column, we analyzed different processes affecting the mass and flux variations. Our first results show that the simple power law decrease is insufficient to represent the vertical change in flux through the water column, and led us to identify seven different patterns of PM distribution through the water column.
 
Presentation is (Oral, Poster or No Preference): Oral
Presentation is given by student: Yes
   
 
           
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