{"id":1087,"date":"1999-09-06T06:22:49","date_gmt":"1999-09-06T10:22:49","guid":{"rendered":"http:\/\/mseas.net16.net\/?p=1087"},"modified":"2021-08-16T21:35:01","modified_gmt":"2021-08-17T01:35:01","slug":"estimation-and-study-of-mesoscale-variability-in-the-strait-of-sicily","status":"publish","type":"post","link":"https:\/\/mseas.mit.edu\/?p=1087","title":{"rendered":"Estimation and study of mesoscale variability in the Strait of Sicily"},"content":{"rendered":"Considering mesoscale variability in the Strait of Sicily during September 1996, the four-dimensional\r\nphysical fields and their dominant variability and error covariances are estimated and\r\nstudied. The methodology applied in real-time combines an intensive data survey and primitive\r\nequation dynamics based on the error subspace statistical estimation approach. A sequence of\r\nfiltering and prediction problems are solved for a period of 10 days, with adaptive learning of the\r\ndominant errors. Intercomparisons with optimal interpolation fields, clear sea surface temperature\r\nimages and available in situ data are utilized for qualitative and quantitative evaluations. The\r\npresent estimation system is shown to be a comprehensive nonlinear and adaptive assimilation\r\nscheme, capable of providing real-time forecasts of ocean fields and associated dominant\r\nvariability and error covariances. The initialization and evolution of the error subspace is\r\nexplained. The dominant error eigenvectors, variance and covariance fields are illustrated and their\r\nmultivariate, multiscale properties described. Five coupled features associated with the dominant\r\nvariability in the Strait during August-September 1996 emerge from the dominant decomposition\r\nof the initial PE variability covariance matrix: the Adventure Bank Vortex, Maltese Channel Crest,\r\nIonian Shelf Break Vortex, Strait of Messina Vortex, and subbasin-scale temperature and salinity\r\nfronts of the Ionian slope. From the evolution of the estimated fields and dominant predictability\r\nerror covariance decompositions, several of the primitive equation processes associated with the\r\nvariations of these features are revealed, decomposed and studied. In general, the estimation of the\r\nevolving dominant decompositions of the multivariate predictability error and variability covariances\r\nappears promising for ocean sciences and technology. The practical feedbacks of the present\r\napproach which include the determination of data optimals and the refinements of dynamical and\r\nmeasurement models are considered.","protected":false},"excerpt":{"rendered":"<p>Considering mesoscale variability in the Strait of Sicily during September 1996, the four-dimensional physical fields and their dominant variability and error covariances are estimated and studied. The methodology applied in real-time combines an intensive data survey and primitive equation dynamics based on the error subspace statistical estimation approach. A sequence of filtering and prediction problems [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31,182,37,33,34,38,5,59,62,64],"tags":[],"class_list":["post-1087","post","type-post","status-publish","format-standard","hentry","category-uncertainty-quantification-and-reduced-order-modeling","category-learning-and-data-assimilation","category-applications-to-ocean-dynamics","category-uncertainty-quantification-and-predictions","category-data-assimilation","category-physical-oceanography","category-publications","category-papers-in-refereed-journals-physical-oceanography","category-papers-in-refereed-journals-data-assimilation","category-papers-in-refereed-journals-uncertainty-quantification-and-predictions"],"_links":{"self":[{"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/posts\/1087","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1087"}],"version-history":[{"count":4,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/posts\/1087\/revisions"}],"predecessor-version":[{"id":5737,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=\/wp\/v2\/posts\/1087\/revisions\/5737"}],"wp:attachment":[{"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mseas.mit.edu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}