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Estimating ventilation time scales using overturning stream functions
Stockholm University, Faculty of Science, Department of Geological Sciences.
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Geological Sciences.
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2014 (English)In: Ocean Dynamics, ISSN 1616-7341, E-ISSN 1616-7228, Vol. 64, no 6, 797-807 p.Article in journal (Refereed) Published
Abstract [en]

A simple method for estimating ventilation time scales from overturning stream functions is proposed. The stream function may be computed using either geometric coordinates or a generalized vertical coordinate, such as potential density (salinity in our study). The method is tested with a three-dimensional circulation model describing an idealized semi-enclosed ocean basin ventilated through a narrow strait over a sill, and the result is compared to age estimates obtained from a passive numerical age tracer. The best result is obtained when using the stream function in salinity coordinates. In this case, the reservoir-averaged advection time obtained from the overturning stream function in salinity coordinates agrees rather well with the mean age of the age tracer, and the corresponding maximum ages agree very well.

Place, publisher, year, edition, pages
2014. Vol. 64, no 6, 797-807 p.
Keyword [en]
MOM4p1, Ocean ventilation, Age tracer, Stream function
National Category
Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:su:diva-105900DOI: 10.1007/s10236-014-0726-5ISI: 000336981700003OAI: oai:DiVA.org:su-105900DiVA: diva2:733374
Funder
Swedish Research Council, 2008-4400
Note

AuthorCount:5;

Available from: 2014-07-09 Created: 2014-07-08 Last updated: 2017-12-05Bibliographically approved

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Nycander, JonasNilsson, JohanJakobsson, MartinDöös, Kristofer
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Department of Geological SciencesDepartment of Meteorology
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Ocean Dynamics
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