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dc.contributor.authorLedwell, James R.  Concept link
dc.contributor.authorHe, Ruoying  Concept link
dc.contributor.authorXue, Zuo  Concept link
dc.contributor.authorDiMarco, Steven  Concept link
dc.contributor.authorSpencer, Laura J.  Concept link
dc.contributor.authorChapman, Piers  Concept link
dc.date.accessioned2016-05-10T19:43:07Z
dc.date.available2016-08-05T07:53:52Z
dc.date.issued2016-02-05
dc.identifier.citationJournal of Geophysical Research: Oceans 121 (2016): 1110–1132en_US
dc.identifier.urihttps://hdl.handle.net/1912/7996
dc.descriptionAuthor Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 121 (2016): 1110–1132, doi:10.1002/2015JC011405.en_US
dc.description.abstractA 25 km streak of CF3SF5 was released on an isopycnal surface approximately 1100 m deep, and 150 m above the bottom, along the continental slope of the northern Gulf of Mexico, to study stirring and mixing of a passive tracer. The location and depth of the release were near those of the deep hydrocarbon plume resulting from the 2010 Deepwater Horizon oil well rupture. The tracer was sampled between 5 and 12 days after release, and again 4 and 12 months after release. The tracer moved along the slope at first but gradually moved into the interior of the Gulf. Diapycnal spreading of the patch during the first 4 months was much faster than it was between 4 and 12 months, indicating that mixing was greatly enhanced over the slope. The rate of lateral homogenization of the tracer was much greater than observed in similar experiments in the open ocean, again possibly enhanced near the slope. Maximum concentrations found in the surveys had fallen by factors of 104, 107, and 108, at 1 week, 4 months, and 12 months, respectively, compared with those estimated for the initial tracer streak. A regional ocean model was used to simulate the tracer field and help interpret its dispersion and temporal evolution. Model-data comparisons show that the model simulation was able to replicate statistics of the observed tracer distribution that would be important in assessing the impact of oil releases in the middepth Gulf.en_US
dc.description.sponsorshipThis research was made possible by a grant from The Gulf of Mexico Research Initiative.en_US
dc.language.isoen_USen_US
dc.publisherJohn Wiley & Sonsen_US
dc.relation.urihttps://doi.org/10.1002/2015JC011405
dc.subjectMixingen_US
dc.subjectTraceren_US
dc.subjectGulf of Mexicoen_US
dc.subjectTurbulenceen_US
dc.subjectCirculationen_US
dc.titleDispersion of a tracer in the deep Gulf of Mexicoen_US
dc.typeArticleen_US
dc.description.embargo2016-08-05en_US
dc.identifier.doi10.1002/2015JC011405


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