کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4476803 1622759 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Pathways of marine debris derived from trajectories of Lagrangian drifters
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
پیش نمایش صفحه اول مقاله
Pathways of marine debris derived from trajectories of Lagrangian drifters
چکیده انگلیسی

Global set of trajectories of satellite-tracked Lagrangian drifters is used to study the dynamics of marine debris. A probabilistic model is developed to eliminate the bias in spatial distribution of drifter data due to heterogeneous deployments. Model experiments, simulating long-term evolution of initially homogeneous drifter array, reveal five main sites of drifter aggregation, located in the subtropics and maintained by converging Ekman currents. The paper characterizes the geography and structure of the collection regions and discusses factors that determine their dynamics. A new scale Rc = (4k/|D|)1/2 is introduced to characterize tracer distribution under competing effects of horizontal divergence D and diffusion k. Existence and locations of all five accumulation zones have been recently confirmed by direct measurements of microplastic at the sea surface.


► Drifting buoys as marine debris.
► Debris accumulation in probabilistic model.
► A new scale for a convergent-diffusive system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 65, Issues 1–3, 2012, Pages 51–62
نویسندگان
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