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Título

Mediterranean Sea level and barotropic flow through the Strait of Gibraltar for the period 1958-2001 and reconstructed since 1659

Autor Gomis, Damià ; Tsimplis, M. N.; Martín Míguez, Belén ; Ratsimandresy, A. W.; García-Lafuente, Jesús; Josey, Simon A.
Fecha de publicación 2006
EditorAmerican Geophysical Union
Citación Journal of Geophysical Research: Oceans 111: C11005 (2006)
ResumenSea level values from a two-dimensional model of the Mediterranean Sea forced by atmospheric pressure and wind are used to estimate the barotropic flow through the Strait of Gibraltar for the period 1958-2001. The Mediterranean mean sea level derived from the model ranges between ±20 cm with a standard deviation of 5.5 cm and is correlated to the North Atlantic Oscillation (NAO) index. Thus NAO historical data and reconstructions are used to derive the Mediterranean Sea level variability from 1659 until 2001. The accuracy of the reconstruction is estimated in 2.7 cm for monthly mean values, 0.41 cm for annual mean values, and 0.22 cm for decadal mean values (0.48 cm for decadal winter mean sea level). The barotropic flow through the strait is computed from the model output as the time derivative of the total volume of the basin. During the period 1958-2001 the estimated daily flow ranges between ±2.7 Sv, with a standard deviation. of 0.56 Sv. The dominant periodicities are in between 1 and 2 weeks. At these scales the model successfully reproduces previously published flow estimates based on current meter observations, which confirms that atmospheric pressure and wind dominate the intraseasonal variability of the flow. For the annual cycle the variability of the atmospherically induced flow is similar to the variability of the flow induced by the evaporation-precipitation (E-P) budget (±0.025 Sv), though absolute values of the first are about a third of the latter. At longer timescales the atmospheric contribution is much smaller than the E-P induced flow. Copyright 2006 by the American Geophysical Union.
Versión del editorhttp://dx.doi.org/10.1029/2005JC003186
URI http://hdl.handle.net/10261/93351
DOI10.1029/2005JC003186
Identificadoresdoi: 10.1029/2005JC003186
issn: 0148-0227
Aparece en las colecciones: (IMEDEA) Artículos
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