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Using a Lagrangian model to estimate source regions of particles in sediment traps

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Abstract

A Lagrangian model is used to evaluate source regions of particles collected in the sediment traps at the DYFAMED (Dynamique des Flux Atmosphériques en Méditerranée) station by tracking particles backwards from March 1 to August 31, 2001. The analysis suggests that source regions depend on the flow fields, the settling speed of the particles, and the deployment depths of the traps. Monthly variation is observed in the distribution patterns of source regions, which is caused by the currents. The source regions are located around the traps and up to hundreds of kilometers away. As the settling speed increases with the particle diameters, the distance to the source regions decreases. The vertical flux can be approximately estimated in 1D for the particles with diameters larger than 500 μm. Furthermore, traps moored at various depths at the DYFAMED can collect particles that originated from different regions in the Ligurian Sea.

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Authors and Affiliations

  1. School of Marine Sciences, Nanjing University of Information Science and Technology, Nanjing, 210044, China

    ZhongFeng Qiu

  2. CNRS, IRD, LOPB-UMR 6535, Laboratoire d’Océanographie Physique et Biogéochimique, OSU/Centre d’Océanologie de Marseille, Aix-Marseille Université, Marseille, France

    A. M. Doglioli & F. Carlotti

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  1. ZhongFeng Qiu
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  2. A. M. Doglioli
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  3. F. Carlotti
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Correspondence to ZhongFeng Qiu.

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Qiu, Z., Doglioli, A.M. & Carlotti, F. Using a Lagrangian model to estimate source regions of particles in sediment traps. Sci. China Earth Sci. 57, 2447–2456 (2014). https://doi.org/10.1007/s11430-014-4880-x

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  • DOI: https://doi.org/10.1007/s11430-014-4880-x

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