A Lagrangian model is used to evaluate source regions of particles collected in the sediment traps at the DYFAMED （Dy namique des Flux Atmospheriques en Mediterranee） station by tracking particles backwards from Mar...A Lagrangian model is used to evaluate source regions of particles collected in the sediment traps at the DYFAMED （Dy namique des Flux Atmospheriques en Mediterranee） 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 lain. Furthermore, traps moored at various depths at the DYFAMED can collect parti- cles that originated from different regions in the Ligurian Sea.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.40821004)Public Science and Technology Research Funds Projects of Ocean(Grant No.201005030)+1 种基金the National Natural Science Foundation of China(Grant No.41276186)the Program of Nanjing University of Information Science and Technology(Grant No.S8111005001)
文摘A Lagrangian model is used to evaluate source regions of particles collected in the sediment traps at the DYFAMED （Dy namique des Flux Atmospheriques en Mediterranee） 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 lain. Furthermore, traps moored at various depths at the DYFAMED can collect parti- cles that originated from different regions in the Ligurian Sea.
