The Mediterranean Outflow Water: Transformations and Pathways into the Gulf of Cádiz
Memoria de tesis doctoral presentada por Marc Gasser i Rubinat para obtener el título de Doctor por la Universitat Politècnica de Catalunya (UPC), realizada bajo la dirección del Dr. Josep Lluís Pelegrí Llopart del Institut de Ciències del Mar (ICM-CSIC).-- 166 pages [EN] The Mediterranean Outflow W...
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2018
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ftcsic:oai:digital.csic.es:10261/176695 2024-02-11T10:06:50+01:00 The Mediterranean Outflow Water: Transformations and Pathways into the Gulf of Cádiz Gasser, Marc Pelegrí, Josep Lluís 2018-11 http://hdl.handle.net/10261/176695 en eng Universidad Politécnica de Cataluña CSIC - Instituto de Ciencias del Mar (ICM) Sí http://hdl.handle.net/10261/176695 open Mediterranean outflow water Strait of Gibraltar Gulf of Cádiz Contourites Turbidites Bathymetric steering Gravity current Entrainment Cold-water event Drainage basin Flux de sortida d aigua mediterrànea Estret de Gibraltar Golf de Càdiz Canalització pel fons Corrent de gravetat Incorporació Episodi d'aigües fredes Conca de drenatge tesis doctoral http://purl.org/coar/resource_type/c_db06 2018 ftcsic 2024-01-16T10:36:24Z Memoria de tesis doctoral presentada por Marc Gasser i Rubinat para obtener el título de Doctor por la Universitat Politècnica de Catalunya (UPC), realizada bajo la dirección del Dr. Josep Lluís Pelegrí Llopart del Institut de Ciències del Mar (ICM-CSIC).-- 166 pages [EN] The Mediterranean Outflow Water (MOW) is a dense (¿>1028.5 kg/m3), saline (38.5 g/kg) ocean stream originated in the evaporative Mediterranean basin flowing westward past Espartel Sill as a fast (>1 m/s) and often unstable (as indicated by its gradient Richardson number) gravity current. During its descense into the Gulf of Cadiz, the MOW entrains the overlying North Atlantic Central Water (NACW), until the density difference between both water masses vanishes, and reaches its equilibrium depth. Inertia, Coriolis and frictional forces (both internal and with the bottom), as well as pressure gradients (associated with both seafloor slope and density gradients), play varying roles throughout the MOW’s trajectory. In particular, bathymetric steering due to contouritic, turbiditic and diapiric structures controls the early trajectory of the outflow. Using both historic and current hydrographic data, and a new high-resolution bathymetry of a critical region west of Espartel Sill, we examine the hydrographic characteristics of the MOW and the mechanisms that set its pathway. Our study is complemented with the proposal of simple models that help explain pbservations of vertical mixing in the Strait of Gibraltar and the behavior of the MOW as a gravity current within the Gulf of Cádiz, as well as with a new tool, based on water tributaries methods, that assesses the relative impact of both seafloor slope and Coriolis force in steering the outflow [CAT] La sortida d'aigua mediterrània (MOW) és un corrent oceànic dens (¿>1028.5 kg/m3) i salí (38.5 lg/m3) originat en la conca evaporativa de la Mar Mediterrània que flueix passant la baixa d'Espartel en forma d'un corrent de gravetat molt ràpid (>1 m/s) i sovint inestable (tal i com indica ... Doctoral or Postdoctoral Thesis North Atlantic Digital.CSIC (Spanish National Research Council) |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Mediterranean outflow water Strait of Gibraltar Gulf of Cádiz Contourites Turbidites Bathymetric steering Gravity current Entrainment Cold-water event Drainage basin Flux de sortida d aigua mediterrànea Estret de Gibraltar Golf de Càdiz Canalització pel fons Corrent de gravetat Incorporació Episodi d'aigües fredes Conca de drenatge |
spellingShingle |
Mediterranean outflow water Strait of Gibraltar Gulf of Cádiz Contourites Turbidites Bathymetric steering Gravity current Entrainment Cold-water event Drainage basin Flux de sortida d aigua mediterrànea Estret de Gibraltar Golf de Càdiz Canalització pel fons Corrent de gravetat Incorporació Episodi d'aigües fredes Conca de drenatge Gasser, Marc The Mediterranean Outflow Water: Transformations and Pathways into the Gulf of Cádiz |
topic_facet |
Mediterranean outflow water Strait of Gibraltar Gulf of Cádiz Contourites Turbidites Bathymetric steering Gravity current Entrainment Cold-water event Drainage basin Flux de sortida d aigua mediterrànea Estret de Gibraltar Golf de Càdiz Canalització pel fons Corrent de gravetat Incorporació Episodi d'aigües fredes Conca de drenatge |
description |
Memoria de tesis doctoral presentada por Marc Gasser i Rubinat para obtener el título de Doctor por la Universitat Politècnica de Catalunya (UPC), realizada bajo la dirección del Dr. Josep Lluís Pelegrí Llopart del Institut de Ciències del Mar (ICM-CSIC).-- 166 pages [EN] The Mediterranean Outflow Water (MOW) is a dense (¿>1028.5 kg/m3), saline (38.5 g/kg) ocean stream originated in the evaporative Mediterranean basin flowing westward past Espartel Sill as a fast (>1 m/s) and often unstable (as indicated by its gradient Richardson number) gravity current. During its descense into the Gulf of Cadiz, the MOW entrains the overlying North Atlantic Central Water (NACW), until the density difference between both water masses vanishes, and reaches its equilibrium depth. Inertia, Coriolis and frictional forces (both internal and with the bottom), as well as pressure gradients (associated with both seafloor slope and density gradients), play varying roles throughout the MOW’s trajectory. In particular, bathymetric steering due to contouritic, turbiditic and diapiric structures controls the early trajectory of the outflow. Using both historic and current hydrographic data, and a new high-resolution bathymetry of a critical region west of Espartel Sill, we examine the hydrographic characteristics of the MOW and the mechanisms that set its pathway. Our study is complemented with the proposal of simple models that help explain pbservations of vertical mixing in the Strait of Gibraltar and the behavior of the MOW as a gravity current within the Gulf of Cádiz, as well as with a new tool, based on water tributaries methods, that assesses the relative impact of both seafloor slope and Coriolis force in steering the outflow [CAT] La sortida d'aigua mediterrània (MOW) és un corrent oceànic dens (¿>1028.5 kg/m3) i salí (38.5 lg/m3) originat en la conca evaporativa de la Mar Mediterrània que flueix passant la baixa d'Espartel en forma d'un corrent de gravetat molt ràpid (>1 m/s) i sovint inestable (tal i com indica ... |
author2 |
Pelegrí, Josep Lluís |
format |
Doctoral or Postdoctoral Thesis |
author |
Gasser, Marc |
author_facet |
Gasser, Marc |
author_sort |
Gasser, Marc |
title |
The Mediterranean Outflow Water: Transformations and Pathways into the Gulf of Cádiz |
title_short |
The Mediterranean Outflow Water: Transformations and Pathways into the Gulf of Cádiz |
title_full |
The Mediterranean Outflow Water: Transformations and Pathways into the Gulf of Cádiz |
title_fullStr |
The Mediterranean Outflow Water: Transformations and Pathways into the Gulf of Cádiz |
title_full_unstemmed |
The Mediterranean Outflow Water: Transformations and Pathways into the Gulf of Cádiz |
title_sort |
mediterranean outflow water: transformations and pathways into the gulf of cádiz |
publisher |
Universidad Politécnica de Cataluña |
publishDate |
2018 |
url |
http://hdl.handle.net/10261/176695 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Sí http://hdl.handle.net/10261/176695 |
op_rights |
open |
_version_ |
1790604833562034176 |