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dc.contributor.authorNordam, Tor
dc.contributor.authorNepstad, Raymond
dc.contributor.authorLitzler, Emma
dc.contributor.authorRöhrs, Johannes
dc.date.accessioned2019-12-17T14:47:59Z
dc.date.available2019-12-17T14:47:59Z
dc.date.created2019-09-03T14:16:29Z
dc.date.issued2019-09
dc.identifier.citationMarine Pollution Bulletin. 2019, 631-638.nb_NO
dc.identifier.issn0025-326X
dc.identifier.urihttp://hdl.handle.net/11250/2633743
dc.description.abstractIn 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.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectOil spill modellingnb_NO
dc.subjectRandom walknb_NO
dc.subjectEddy diffusivitynb_NO
dc.subjectTurbulent mixingnb_NO
dc.subjectVertical mixingnb_NO
dc.titleOn the use of random walk schemes in oil spill modellingnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.rights.holder© 2019 The Authors. Published by Elsevier Ltd.nb_NO
dc.source.pagenumber631-638nb_NO
dc.source.volume146nb_NO
dc.source.journalMarine Pollution Bulletinnb_NO
dc.identifier.doi10.1016/j.marpolbul.2019.07.002
dc.identifier.cristin1721059
cristin.unitcode7566,6,0,0
cristin.unitnameMiljø og nye ressurser
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal