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On the mediterranean water composition

AuthorsCarracedo, L. ; Pardo, Paula C. ; Flecha, Susana ; Pérez, Fiz F.
KeywordsGeographic location/entity
North Atlantic Ocean
Circulation/ Dynamics
Atm/ Ocean Structure/ Phenomena
Water masses
Physical Meteorology and Climatology
Issue DateApr-2016
PublisherAmerican Meteorological Society
CitationJournal of Physical Oceanography 46(4): 1339–1358 (2016)
AbstractThe Mediterranean Outflow Water (MOW) spills from the Mediterranean Sea (east North Atlantic basin) west off the Strait ofGibraltar.AsMOWoutflows, it entrains eastern NorthAtlantic CentralWaters (ENACW) and IntermediateWaters to formthe neutrally buoyantMediterraneanWater (MW) that can be traced over the entire NorthAtlantic basin. Its high salinity content influences the thermohaline properties of the intermediate– deepwater column in theNorthAtlantic and its dynamics.Here, the composition ofMWin its source region (the Gulf of Cádiz, west off Strait of Gibraltar) is investigated on the basis of an optimum multiparameter analysis. The results obtained indicate that mixing of MOW (34.1% 6 0.3%) occurs mainly with overlying ENACW (57.1% 6 0.8%) in a process broadly known as central water entrainment. A diluted form (80% of dilution) of the Antarctic Intermediate Water (AAIW) reaches the region and also takes part in MW formation (8.3% 6 0.5%). Finally, the underlying Labrador Sea Water (LSW) also contributes (0.4%6 0.1%) to the characteristics ofMW. Fromthese results and considering 0.74 Sverdrups (Sv; 1 Sv[ 106m3 s21) as themean outflow ofMOW, the MW exportation rate was inferred (2.2 Sv), which, decomposing MW, means that the MOW outflow is accompanied by 1.24 Sv of entrained ENACW, 0.18 Sv of AAIW, and ,0.01 Sv of LSW.
Description20 páginas, 5 tablas, 6 figuras, 1 apéndice.-- Proyecto Carbochange
Publisher version (URL)http://dx.doi.org/10.1175/JPO-D-15-0095.1
Appears in Collections:(IIM) Artículos
(ICMAN) Artículos
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