In situ estimates of horizontal turbulent diffusivity at the sea surface for oil transport simulation

MARINE POLLUTION BULLETIN

卷:117

Article

Matsuzaki, Yoshitaka^1,2  Fujita, Isamu³ 

[1] Port & Airport Res Inst, Yokosuka, Kanagawa 2390826, Japan

[2] Port & Airport Res Inst, Marine Environm Informat Grp, Marine Informat & Tsunami Dept, 3-1-1 Nagase, Yokosuka, Kanagawa 2390826, Japan

[3] Port & Airport Res Inst, Oil Spill Response Res Grp, Nagase 3-1-1, Yokosuka, Kanagawa 2390826, Japan

关键词: In situ estimates;    Horizontal diffusivity;    Sagami Bay;    Oil transport simulation;   

DOI  :  10.1016/j.marpolbul.2016.10.026

来源: Elsevier

【 摘 要 】

Despite many previous in situ estimates of horizontal diffusivity below the sea surface, horizontal diffusivity at the sea surface, which is a parameter required in the prediction of oil diffusion, has not been formulated. This study conducted in situ estimations to quantify horizontal diffusivity at the sea surface. To measure the horizontal diffusivity at and below the sea surface, clusters of thin sponge rubbers (simulating spilled oil), together with drifting buoys, were deployed on successive occasions in Sagami Bay, Japan. The experimental results revealed that horizontal diffusivity was larger at the sea surface than below. Based on the results, a procedure for estimating horizontal diffusivity at the sea surface was introduced to predict the diffusion of spilled oil, which was verified using numerical simulations. The simulation results showed good agreement with observations, suggesting the procedure is appropriate for the estimation of horizontal diffusivity at the sea surface. (C) 2016 Published by Elsevier Ltd.

【 授权许可】

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