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The nonlinear equation of state of sea water and the global water mass distribution
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology .ORCID iD: 0000-0003-1124-4564
2015 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 42, no 18, 7714-7721 p.Article in journal (Refereed) Published
Abstract [en]

The role of nonlinearities of the equation of state (EOS) of seawater for the distribution of water masses in the global ocean is examined through simulations with an ocean general circulation model with various manipulated versions of the EOS. A simulation with a strongly simplified EOS, which contains only two nonlinear terms, still produces a realistic water mass distribution, demonstrating that these two nonlinearities are indeed the essential ones. Further simulations show that each of these two nonlinear terms affects a specific aspect of the water mass distribution: the cabbeling term is crucial for the formation of Antarctic Intermediate Water and the thermobaric term for the layering of North Atlantic Deep Water and Antarctic Bottom Water.

Place, publisher, year, edition, pages
2015. Vol. 42, no 18, 7714-7721 p.
Keyword [en]
water mass distribution, cabbeling, thermobaricity, 4532 General circulation, 4515 Deep recirculations
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:su:diva-123384DOI: 10.1002/2015GL065525ISI: 000363412400059OAI: diva2:873557
Available from: 2015-11-24 Created: 2015-11-24 Last updated: 2015-12-21Bibliographically approved

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