History and evolution of the North-Betic Strait (Prebetic Zone, Betic Cordillera): A narrow, early Tortonian, tidal-dominated, Atlantic–Mediterranean marine passage

Martín, J. M.; Braga, Juan C.; Aguirre, Julio; Puga‐Bernabéu, Ángel

doi:10.1016/j.sedgeo.2009.01.005

Cited by 126 publications

(116 citation statements)

References 28 publications

(45 reference statements)

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“…2), nor the late Miocene Mediterranean-Atlantic seaways (e.g. Betzler et al, 2006;Duggen et al, 2003;Martín et al, 2009;Santisteban and Taberner, 1983) can be resolved on the HadCM3 grid. Instead, a parameterisation of Mediterranean-Atlantic water exchange is employed for modern flow through the Gibraltar straits, which partially mixes thermal and saline properties between the two basins based on temperature and salinity gradients and according to a constant coefficient of exchange (µ).…”

Section: Mediterranean-atlantic Exchangementioning

confidence: 99%

Modelling global-scale climate impacts of the late Miocene Messinian Salinity Crisis

et al. 2014

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Abstract. Late Miocene tectonic changes in MediterraneanAtlantic connectivity and climatic changes caused Mediterranean salinity to fluctuate dramatically, including a tenfold increase and near-freshening. Recent proxy-and modelbased evidence suggests that at times during this Messinian Salinity Crisis (MSC, 5.96-5.33 Ma), highly saline and highly fresh Mediterranean water flowed into the North Atlantic Ocean, whilst at others, no Mediterranean Outflow Water (MOW) reached the Atlantic. By running extreme, sensitivity-type experiments with a fully coupled oceanatmosphere general circulation model, we investigate the potential of these various MSC MOW scenarios to impact global-scale climate.The simulations suggest that although the effect remains relatively small, MOW had a greater influence on North Atlantic Ocean circulation and climate than it does today. We also find that depending on the presence, strength and salinity of MOW, the MSC could have been capable of cooling mid-high northern latitudes by a few degrees, with the greatest cooling taking place in the Labrador, Greenland-IcelandNorwegian and Barents seas. With hypersaline MOW, a component of North Atlantic Deep Water formation shifts to the Mediterranean, strengthening the Atlantic Meridional Overturning Circulation (AMOC) south of 35 • N by 1.5-6 Sv. With hyposaline MOW, AMOC completely shuts down, inducing a bipolar climate anomaly with strong cooling in the north (mainly −1 to −3 • C, but up to −8 • C) and weaker warming in the south (up to +0.5 to +2.7 • C).These simulations identify key target regions and climate variables for future proxy reconstructions to provide the best and most robust test cases for (a) assessing Messinian model performance, (b) evaluating Mediterranean-Atlantic connectivity during the MSC and (c) establishing whether or not the MSC could ever have affected global-scale climate.

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Section: Mediterranean-atlantic Exchangementioning

confidence: 99%

Modelling global-scale climate impacts of the late Miocene Messinian Salinity Crisis

et al. 2014

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“…The Guadalquivir Basin acted as a corridor, the 'North Betic Strait', connecting the Atlantic and the Mediterranean during the early Tortonian (Aguirre et al 2007;Martín et al 2009;Braga et al 2010). Betic seaways that connected the Atlantic and the Mediterranean through the Guadalquivir Basin were progressively closed during the late Miocene (Esteban et al 1996;Martín et al 2001;Braga et al 2003;Betzler et al 2006;Martín et al 2009), culminating in the closure of the Guadalhorce Corridor in the early Messinian (Martín et al 2001;Pérez-Asensio et al 2012a).…”

Section: Geographical and Geological Settingmentioning

confidence: 99%

“…Betic seaways that connected the Atlantic and the Mediterranean through the Guadalquivir Basin were progressively closed during the late Miocene (Esteban et al 1996;Martín et al 2001;Braga et al 2003;Betzler et al 2006;Martín et al 2009), culminating in the closure of the Guadalhorce Corridor in the early Messinian (Martín et al 2001;Pérez-Asensio et al 2012a). Following its closure, the only remaining Atlantic-Mediterranean connections were through the Rifian Corridors in northern Morocco (Esteban et al 1996).…”

Section: Geographical and Geological Settingmentioning

confidence: 99%

“…This was an important time period that led to one of the most dramatic episodes in the geologically recent history of the Mediterranean Sea. Progressive restriction of the various Betic and Rifian corridors connecting the Atlantic and Mediterranean resulted in the isolation of the Mediterranean from the world ocean (Benson et al 1991;Martín & Braga 1994;Esteban et al 1996;Riding et al 1998;Krijgsman et al 1999;Martín et al 2001;Braga et al 2006). This, in turn, forced the formation of extensive evaporite deposits in the central Mediterranean and in its peripheral basins during the Messinian 'Salinity Crisis' (Hsü et al 1973(Hsü et al , 1977.…”

Section: Effect Of the Mediterranean Outflow Water Interruption On Pamentioning

confidence: 99%

“…1). This core is located in the Guadalquivir Basin, an open marine embayment that constituted the Atlantic side of the Guadalhorce Corridor, the final Betic Atlantic-Mediterranean gateway, and that closed at 6.18 Ma (Martín et al 2001(Martín et al , 2009Pérez-Asensio et al 2012a). According to benthic foraminiferal assemblages, the Messinian record of the Montemayor-1 core represents a shallowing-upward sequence from middle-and upper-slope to shelf-edge and finally outer-shelf deposits (Pérez-Asensio et al 2012b; Fig.…”

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confidence: 99%

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Messinian productivity changes in the northeastern Atlantic and their relationship to the closure of the Atlantic–Mediterranean gateway: implications for Neogene palaeoclimate and palaeoceanography

Pérez-Asensio

Aguirre

Schmiedl

et al. 2014

JGS

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Abstract:The stable isotope composition of planktic and benthic foraminifera and the distribution of selected benthic foraminiferal species from a Messinian record of the lower Guadalquivir Basin, northeastern Atlantic Ocean, show that regional productivity changes were linked to glacioeustatic fluctuations. Glacial periods were characterized by poorly ventilated bottom waters as a result of weak Atlantic Meridional Overturning Circulation (AMOC), and by phases of high productivity related to intensified upwelling. In contrast, wellventilated bottom waters owing to strong AMOC, the presence of degraded organic matter in the upper slope, and high input of degraded terrestrial organic matter derived from fluvial discharge to the outer shelf were recorded during interglacial periods. Before closure of the adjacent Guadalhorce Corridor at 6.18 Ma, which was the final active Betic Atlantic-Mediterranean gateway, the study area was alternately influenced by wellventilated Mediterranean Outflow Water (MOW) and poorly ventilated Atlantic Upwelled Water (AUW). Following closure of the corridor, cessation of the MOW reduced the AMOC and promoted glacial conditions in the northern hemisphere, resulting in the establishment of local upwelling cells.

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Sea level and climate forcing of the Sr isotope composition of lateMioceneMediterranean marine basins

Schildgen

Cosentino

Frijia

et al. 2014

Geochem Geophys Geosyst

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Sr isotope records from marginal marine basins track the mixing between seawater and local continental runoff, potentially recording the effects of sea level, tectonic, and climate forcing in marine fossils and sediments. Sr/ 86 Sr analyses from the astronomically tuned Lower Evaporites in the central Apennines (Italy) allow us to explore the effect of glacio-eustatic sea level and precipitation changes on 87 Sr/ 86 Sr. Most variation in our data can be explained by changes in sea level, with greatest negative excursions from global seawater values occurring during relative sea level lowstands, which generally coincided with arid conditions in the Mediterranean realm. We suggest that this greater sensitivity to lowered sea level compared with higher runoff could relate to the inverse relationship between Sr concentration and river discharge. Variations in the residence time of groundwater within the karst terrain of the circum-Mediterranean region during arid and wet phases may help to explain the single (robust) occurrence of a negative excursion during a sea level highstand, but this explanation remains speculative without more detailed paleoclimatic data for the region.

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History and evolution of the North-Betic Strait (Prebetic Zone, Betic Cordillera): A narrow, early Tortonian, tidal-dominated, Atlantic–Mediterranean marine passage

Cited by 126 publications

References 28 publications

Modelling global-scale climate impacts of the late Miocene Messinian Salinity Crisis

Modelling global-scale climate impacts of the late Miocene Messinian Salinity Crisis

Messinian productivity changes in the northeastern Atlantic and their relationship to the closure of the Atlantic–Mediterranean gateway: implications for Neogene palaeoclimate and palaeoceanography

Sea level and climate forcing of the Sr isotope composition of lateMioceneMediterranean marine basins

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