Spatial distribution and intra-annual variability of water masses on the Eastern Gulf of Cadiz seabed
This paper presents the spatial distribution and intra-annual variability of seabed hydrography in the Eastern Gulf of Cadiz based on more than 10 years of near-bottom CTD observations. Well-defined water masses and a variety of mixing products are persistently sorted along three bathymetric areas o...
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Centro Oceanográfico de Cádiz
2016
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Online Access: | http://hdl.handle.net/10508/10579 https://doi.org/10.1016/j.csr.2016.09.001 |
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ftieo:oai:repositorio.ieo.es:10508/10579 2023-05-15T17:35:36+02:00 Spatial distribution and intra-annual variability of water masses on the Eastern Gulf of Cadiz seabed Bellanco, M.J. (María Jesús) Sánchez-Leal, R.F. (Ricardo Félix) Atlantic Ocean Central Atlantic Eastern Central Atlantic Strait of Gibraltar 2016-09-30 http://hdl.handle.net/10508/10579 https://doi.org/10.1016/j.csr.2016.09.001 eng eng Centro Oceanográfico de Cádiz 0278-4343 http://hdl.handle.net/10508/10579 Continental Shelf Research, in-press. today: in-press-in-press doi:10.1016/j.csr.2016.09.001 Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess CC-BY-NC-ND Gulf of Cádiz Seabed water masses Thermohaline properties Spatial distribution Intra-annual variability article 2016 ftieo https://doi.org/10.1016/j.csr.2016.09.001 2022-08-30T23:47:25Z This paper presents the spatial distribution and intra-annual variability of seabed hydrography in the Eastern Gulf of Cadiz based on more than 10 years of near-bottom CTD observations. Well-defined water masses and a variety of mixing products are persistently sorted along three bathymetric areas occupying particular depth intervals: (i) inner shelf waters (<60 m depth), with strong coastal and atmospheric influence; (ii) low-salinity Eastern North Atlantic Central Waters (ENACW) related to the Gulf of Cadiz Current (GCC) along the central and outer shelf (between 100 and 250 m depth); and (iii) a range of salinity and temperature flavors associated with the dense Mediterranean Outflow Water (MOW) occupying the deeper grounds. All three are characterized by significant March– November hydrographic differences suggesting an intra-annual variability pattern. After summer heating and stratification of the water column, warm (17.8 °C) and saline (36.26) waters occupy the inner-shelf in November whereas cooler (14.6 °C) and less saline (36.17) waters occur in March as the combined result of the erosion of the seasonal thermocline and intensified continental runoff. Offshore, colder, more saline and hence denser MOW invades the upper slope in March diluting the easternmost tip of a saltier ENACW wedge and nudging its outer rim up onto the shelf. This narrows and constricts the GCC band in winter, while its bottom trace appears to broaden and stretch eastwards in November. More effective MOW-ENACW mixing west of the Strait of Gibraltar driven both by an elevated MOW and a less stratified ENACW could explain the winter salinification of most of the grounds deeper than 250 m. En prensa 2,0880 Article in Journal/Newspaper North Atlantic Instituto Español de Oceanografía: e-IEO Continental Shelf Research 128 26 35 |
institution |
Open Polar |
collection |
Instituto Español de Oceanografía: e-IEO |
op_collection_id |
ftieo |
language |
English |
topic |
Gulf of Cádiz Seabed water masses Thermohaline properties Spatial distribution Intra-annual variability |
spellingShingle |
Gulf of Cádiz Seabed water masses Thermohaline properties Spatial distribution Intra-annual variability Bellanco, M.J. (María Jesús) Sánchez-Leal, R.F. (Ricardo Félix) Spatial distribution and intra-annual variability of water masses on the Eastern Gulf of Cadiz seabed |
topic_facet |
Gulf of Cádiz Seabed water masses Thermohaline properties Spatial distribution Intra-annual variability |
description |
This paper presents the spatial distribution and intra-annual variability of seabed hydrography in the Eastern Gulf of Cadiz based on more than 10 years of near-bottom CTD observations. Well-defined water masses and a variety of mixing products are persistently sorted along three bathymetric areas occupying particular depth intervals: (i) inner shelf waters (<60 m depth), with strong coastal and atmospheric influence; (ii) low-salinity Eastern North Atlantic Central Waters (ENACW) related to the Gulf of Cadiz Current (GCC) along the central and outer shelf (between 100 and 250 m depth); and (iii) a range of salinity and temperature flavors associated with the dense Mediterranean Outflow Water (MOW) occupying the deeper grounds. All three are characterized by significant March– November hydrographic differences suggesting an intra-annual variability pattern. After summer heating and stratification of the water column, warm (17.8 °C) and saline (36.26) waters occupy the inner-shelf in November whereas cooler (14.6 °C) and less saline (36.17) waters occur in March as the combined result of the erosion of the seasonal thermocline and intensified continental runoff. Offshore, colder, more saline and hence denser MOW invades the upper slope in March diluting the easternmost tip of a saltier ENACW wedge and nudging its outer rim up onto the shelf. This narrows and constricts the GCC band in winter, while its bottom trace appears to broaden and stretch eastwards in November. More effective MOW-ENACW mixing west of the Strait of Gibraltar driven both by an elevated MOW and a less stratified ENACW could explain the winter salinification of most of the grounds deeper than 250 m. En prensa 2,0880 |
format |
Article in Journal/Newspaper |
author |
Bellanco, M.J. (María Jesús) Sánchez-Leal, R.F. (Ricardo Félix) |
author_facet |
Bellanco, M.J. (María Jesús) Sánchez-Leal, R.F. (Ricardo Félix) |
author_sort |
Bellanco, M.J. (María Jesús) |
title |
Spatial distribution and intra-annual variability of water masses on the Eastern Gulf of Cadiz seabed |
title_short |
Spatial distribution and intra-annual variability of water masses on the Eastern Gulf of Cadiz seabed |
title_full |
Spatial distribution and intra-annual variability of water masses on the Eastern Gulf of Cadiz seabed |
title_fullStr |
Spatial distribution and intra-annual variability of water masses on the Eastern Gulf of Cadiz seabed |
title_full_unstemmed |
Spatial distribution and intra-annual variability of water masses on the Eastern Gulf of Cadiz seabed |
title_sort |
spatial distribution and intra-annual variability of water masses on the eastern gulf of cadiz seabed |
publisher |
Centro Oceanográfico de Cádiz |
publishDate |
2016 |
url |
http://hdl.handle.net/10508/10579 https://doi.org/10.1016/j.csr.2016.09.001 |
op_coverage |
Atlantic Ocean Central Atlantic Eastern Central Atlantic Strait of Gibraltar |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
0278-4343 http://hdl.handle.net/10508/10579 Continental Shelf Research, in-press. today: in-press-in-press doi:10.1016/j.csr.2016.09.001 |
op_rights |
Atribución-NoComercial-SinDerivadas 3.0 España http://creativecommons.org/licenses/by-nc-nd/3.0/es/ openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.csr.2016.09.001 |
container_title |
Continental Shelf Research |
container_volume |
128 |
container_start_page |
26 |
op_container_end_page |
35 |
_version_ |
1766134812977922048 |