气候变化领域集成服务门户(CCPortal): On the use of random walk schemes in oil spill modelling

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DOI	10.1016/j.marpolbul.2019.07.002
	On the use of random walk schemes in oil spill modelling
	Nordam T.; Nepstad R.; Litzler E.; Röhrs J.
发表日期	2019
ISSN	0025326X
起始页码	631
结束页码	638
卷号	146
英文摘要	In oil spill models, vertical mixing due to turbulence is commonly modelled by random walk. If the eddy diffusivity varies with depth, failing to take the derivative of the diffusivity into account in the random walk scheme will lead to incorrect results. Depending on the diffusivity profile, the result may be either over- or underprediction of the amount of surfaced oil. The importance of using consistent random walk schemes has been known for decades in, e.g., the plankton modelling community. However, it appears not to be common knowledge in the oil spill community, with inconsistent random walk schemes appearing even in recent publications. We demonstrate and quantify the error due to inconsistent random walk, using a simplified oil spill model, and two different diffusivity profiles. In the two cases considered, a commonly used inconsistent scheme predicts respectively 54% and 202% the amount of surface oil, compared to a consistent scheme. © 2019 Elsevier Ltd
英文关键词	Eddy diffusivity; Oil spill modelling; Random walk; Turbulent mixing; Vertical mixing
语种	英语
scopus关键词	Diffusion; Mixing; Oil spills; Eddy Diffusivities; Oil spill modelling; Random Walk; Turbulent mixing; Vertical mixing; Random processes; diffusivity; modeling; oil spill; random walk method; turbulence; turbulent mixing; vertical mixing; article; case report; clinical article; eddy diffusivity; nonhuman; oil spill; plankton; publication; computer simulation; diffusion; randomization; theoretical model; water pollution; wind; Computer Simulation; Diffusion; Models, Theoretical; Petroleum Pollution; Random Allocation; Water Pollution, Chemical; Wind
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/149672
作者单位	SINTEF Ocean, Trondheim, Norway; Norges Teknisk-Naturvitenskapelige Universitet, Trondheim, Norway; Norwegian Meteorological Institute, Oslo, Norway
推荐引用方式 GB/T 7714	Nordam T.,Nepstad R.,Litzler E.,et al. On the use of random walk schemes in oil spill modelling[J],2019,146.
APA	Nordam T.,Nepstad R.,Litzler E.,&Röhrs J..(2019).On the use of random walk schemes in oil spill modelling.Marine Pollution Bulletin,146.
MLA	Nordam T.,et al."On the use of random walk schemes in oil spill modelling".Marine Pollution Bulletin 146(2019).