Abstract Oil plumes released from subsea blowouts can induce strong optical extinction effect and significantly affect radiative transfer in the ocean euphotic zone where photosynthesis occurs. In this paper, the effect of oil plumes on the ocean radiative transfer is studied numerically by modeling the dispersion of oil plume in the ocean mixed layer and the radiative transfer through the oil-contaminated seawater. Due to the interactions with flows in the ocean mixed layer, oil plumes of different droplet diameters exhibit considerable differences in plume size, shape and oil concentration. With the same volumetric release rate, plumes of large oil droplets exhibit highly intermittent local concentration in near-surface regions and cause strong but intermittent extinction effect over relatively small horizontal area; plumes of small oil droplets diffuse more smoothly over large horizontal and vertical extensions, resulting in significant overall extinction effect to the radiative transfer in the ocean euphotic zone.

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油羽对大洋上层辐射转移的影响——数值研究

摘要 海底井喷释放的油羽会引起强烈的光消光效应，并显着影响发生光合作用的海洋透光区的辐射传递。本文通过模拟油羽在海洋混合层中的扩散和通过受油污染的海水的辐射转移，数值研究了油羽对海洋辐射转移的影响。由于与海洋混合层中流动的相互作用，不同液滴直径的油羽在羽流大小、形状和油浓度方面表现出相当大的差异。在相同的体积释放速率下，大油滴羽流在近地表区域表现出高度间歇性的局部集中，并在相对较小的水平区域内产生强烈但间歇性的消光效应；