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A Lagrangian-trajectory study of a gradually mixed estuary
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology .
2011 (English)In: Continental Shelf Research, ISSN 0278-4343, E-ISSN 1873-6955, Vol. 31, no 17, 1811-1817 p.Article in journal (Refereed) Published
Abstract [en]

When modelling is used for investigating estuarine systems, a choice generally has to be made between applying simple mass-balance considerations or using a process-resolving three-dimensional (3-D) numerical circulation model. In the present investigation of the Gulf of Finland, a gradually mixed estuary in the Baltic Sea, it is demonstrated how Lagrangian-trajectory analysis applied to the output from a 3-D model minimizes the disadvantages associated with both of the modelling techniques referred to above. This formalism made it possible to demonstrate that the main part of the Gulf is dominated by water originating from the Baltic proper, and that the most pronounced mixing with fresh water from the river Neva takes place over a limited zone in the inner part of the Gulf. Dynamical insights were furthermore obtained by using the Lagrangian formalism to construct overturning stream-functions for the two source waters.

Place, publisher, year, edition, pages
2011. Vol. 31, no 17, 1811-1817 p.
Keyword [en]
Numerical modeling, Lagrangian trajectories, Estuarine mixing, Gulf of Finland, Baltic Sea
National Category
Meteorology and Atmospheric Sciences
Identifiers
URN: urn:nbn:se:su:diva-70882DOI: 10.1016/j.csr.2011.07.007ISI: 000296684000002OAI: oai:DiVA.org:su-70882DiVA: diva2:483430
Note
authorCount :4Available from: 2012-01-25 Created: 2012-01-24 Last updated: 2017-12-08Bibliographically approved

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