Inertia Influences Pelagic Sargassum Advection and Distribution
Inertia Influences Pelagic Sargassum Advection and Distribution
复制标题
DOI：
10.1029/2018gl081489
复制
发表时间：
2019-03
影响因子：
5.2
通讯作者：
Maureen T. Brooks;V. J. Coles;W. Coles
中科院分区：
文献类型：
--
作者：
Maureen T. Brooks;V. J. Coles;W. Coles
惯性（对浮力有限大小物体速度变化的阻力）对浮游马尾藻（一种大型藻类）平流的影响是天然马尾藻筏的大小和密度的函数。在这里，我们提出了马尾藻密度的观测结果和一种从遥感观测中估计马尾藻筏有效半径的方法。这使得球形粒子惯性效应的拉格朗日建模的现有理论框架可以应用于马尾藻。考虑到惯性，马尾藻从马尾藻海向南出口的数量增加了20%，并提供了一条返回热带的途径，这对维持自给自足的种群可能很重要。解决惯性效应还会导致墨西哥湾和加勒比海的滞留量增加，在这些地区马尾藻淹没事件越来越普遍。在马尾藻平流模型中加入惯性效应可以改善对这些事件的预测。
The effect of inertia (resistance to a change in velocity of buoyant finite‐sized objects) on the advection of pelagic Sargassum, a macroalgae, is a function of the size and density of natural Sargassum rafts. Here we present observations of Sargassum density and an approach for estimating an effective radius of Sargassum rafts from remote‐sensing observations. This allows the existing theoretical framework for Lagrangian modeling of inertial effects on spherical particles to be applied to Sargassum. Accounting for inertia yields up to a 20% increase in Sargassum export from the Sargasso Sea southward and provides a return pathway to the tropics that may be important to maintaining a self‐sustaining population. Resolving inertial effects also leads to increases in retention in the Gulf of Mexico and Caribbean Sea, where Sargassum inundation events are increasingly common. Including inertial effects in models of Sargassum advection could improve predictions of these events.