Pathways of marine debris derived from trajectories of Lagrangian drifters
Pathways of marine debris derived from trajectories of Lagrangian drifters
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DOI：
10.1016/j.marpolbul.2011.04.016
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发表时间：
2012-01-01
影响因子：
5.8
通讯作者：
Niiler, Peter
中科院分区：
文献类型：
--
作者：
Maximenko, Nikolai;Hafner, Jan;Niiler, Peter
卫星跟踪拉格朗日漂流者的全球轨迹集被用来研究海洋垃圾的动力学。为了消除非均匀分布对漂移数据空间分布的影响，提出了一种概率模型。模式实验模拟了最初均匀的漂流阵列的长期演变，揭示了漂流聚集的五个主要地点，这些地点位于亚热带，由辐合的Ekman流维持。本文描述了采集区的地理和结构特征，并讨论了决定其动态的因素。引入了一个新的标度R-c=(4k/垂直条D垂直条)(1/2)来描述水平发散D和扩散k竞争作用下示踪剂的分布。最近，通过对海面微塑性的直接测量，证实了所有五个聚集区的存在和位置。(C)2011爱思唯尔有限公司。保留所有权利。
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 R-c = (4k/vertical bar D vertical bar)(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. (C) 2011 Elsevier Ltd. All rights reserved.