Impacts of Convergence on Structure Functions from Surface Drifters in the Gulf of Mexico SCIE SCOPUS

DC Field Value Language Pearson, Jenna - Fox-Kemper, Baylor - Barkan, Roy - Choi, Jun - Bracco, Annalisa - McWilliams, James C. - 2020-12-10T08:00:43Z - 2020-12-10T08:00:43Z - 2020-05-27 - 2019-03 -
dc.identifier.issn 0022-3670 -
dc.identifier.uri -
dc.description.abstract There are limitations in approximating Eulerian statistics from surface drifters, due to biases from surface convergences. By contrasting second- and third-order Eulerian and surface drifter structure functions obtained from a model of the Gulf of Mexico, the consequences of the semi-Lagrangian nature of observations during the summer Grand Lagrangian Deployment (GLAD) and winter Lagrangian Submesoscale Experiment (LASER) are estimated. By varying launch pattern and location, the robustness and sensitivity of these statistics are evaluated. Over scales less than 10 km, second-order structure functions of surface drifters consistently have shallower slopes (similar to r(2/3)) than Eulerian statistics (similar to r), suggesting that surface drifter structure functions differ systematically and do not reproduce the scalings of the Eulerian fields. Medians of Eulerian and cluster release second-order statistics are also significantly different across all scales. Synthetic cluster release statistics depend on launch location and weakly on launch pattern. The observations suggest little seasonal difference in the second-order statistics, but the LASER third-order structure function shows a sign change around 1 km, while GLAD and the synthetic cluster releases show a third-order structure function sign change around 10 km. Further, synthetic surface drifter cluster releases (and therefore likely the GLAD observations) show robust biases in the negative third-order structure functions, which may lead to significant overestimation of the spectral energy flux and underestimation of the transition scale to a forward energy cascade. The Helmholtz decomposition, and curl and divergence statistics, of Eulerian and cluster releases differ, particularly on scales less than 10 km, in agreement with observations of drifters preferentially sampling convergences in coherent structures. -
dc.description.uri 1 -
dc.language English -
dc.subject NORTHERN GULF -
dc.subject PART I -
dc.subject TURBULENCE -
dc.subject STATISTICS -
dc.subject DISPERSION -
dc.subject VELOCITY -
dc.subject ENERGY -
dc.subject CLIMATOLOGY -
dc.subject SPECTRUM -
dc.title Impacts of Convergence on Structure Functions from Surface Drifters in the Gulf of Mexico -
dc.type Article -
dc.citation.endPage 690 -
dc.citation.startPage 675 -
dc.citation.volume 49 -
dc.citation.number 3 -
dc.contributor.alternativeName 최준명 -
dc.identifier.bibliographicCitation JOURNAL OF PHYSICAL OCEANOGRAPHY, v.49, no.3, pp.675 - 690 -
dc.identifier.doi 10.1175/JPO-D-18-0029.1 -
dc.identifier.scopusid 2-s2.0-85065826081 -
dc.identifier.wosid 000459151100002 -
dc.type.docType Article -
dc.description.journalClass 1 -
dc.subject.keywordPlus NORTHERN GULF -
dc.subject.keywordPlus SUBMESOSCALE DYNAMICS -
dc.subject.keywordPlus PART I -
dc.subject.keywordPlus TURBULENCE -
dc.subject.keywordPlus STATISTICS -
dc.subject.keywordPlus DISPERSION -
dc.subject.keywordPlus VELOCITY -
dc.subject.keywordPlus ENERGY -
dc.subject.keywordPlus CLIMATOLOGY -
dc.subject.keywordPlus SPECTRUM -
dc.subject.keywordAuthor Ocean -
dc.subject.keywordAuthor Seas/gulfs/bays -
dc.subject.keywordAuthor Energy transport -
dc.subject.keywordAuthor Statistics -
dc.subject.keywordAuthor Oceanic variability -
dc.relation.journalWebOfScienceCategory Oceanography -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.relation.journalResearchArea Oceanography -
Appears in Collections:
Marine Environmental & Climate Research Division > Ocean Circulation Research Center > 1. Journal Articles
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