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| Fajar, N. M.; Pardo, P. C.; Carracedo, Lidia; Vazquez-rodriguez, M.; Rios, A. F.; Perez, Ff. |
| The carbon system in the water masses of the Iberian Basin (North Atlantic Ocean) has been affected over the last two decades by the increase in anthropogenic CO2 (C-ant). In order to study the storage of C-ant in the Iberian Basin, variables of the carbonic system (i.e., pH, total inorganic carbon, and total alkalinity), among others, were measured during the CAIBOX cruise conducted between July and August 2009 within the framework of the CAIBEX project (Shelf-Ocean Exchanges in the Canary-Iberian Large Marine Ecosystem). The storage of C-ant was estimated using two different back-calculation techniques (i.e., the phi C degrees(T) and TrOCA methods) and for six layers of the water column corresponding to the approximate locations of the characteristic... |
| Tipo: Text |
Palavras-chave: Anthropogenic CO2; Back-calculation. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00629/74112/73546.pdf |
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| Carracedo, Lidia; Pardo, P. C.; Villacieros-robineau, N.; De La Granda, F.; Gilcoto, M.; Perez, F.f.. |
| The CAIBOX cruise was conducted from 25 July to 14 August 2009. Three consecutive transects (zonal, meridional, and transverse) formed a closed box to the west of the Strait of Gibraltar. This study aimed to analyze the thermohaline properties, volume transports, and water mass distributions (percentages) along the meridional section (30-41.5 degrees N, 20 degrees W). We identified the main geostrophic current (Azores Current) and its associated volume transport and interannual changes. Data from previous cruises (AZORES 1, A16N, CLIVAR, OACES, and CHAOS) with similar tracks were employed to compare with the CAIBOX meridional section. All but one (CHAOS) were summer cruises. We estimated a mean transport for the Azores Current at 20 degrees W of 9.3 +/-... |
| Tipo: Text |
Palavras-chave: Northeast Atlantic; Azores Current; Water masses; Multiparametric mixing analysis. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00629/74111/73545.pdf |
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| Garcia-lafuente, J.; Delgado, J.; Sanchez Roman, A.; Soto, J.; Carracedo, Lidia; Diaz Del Rio, G.. |
| Four-year time series of observations in Espartel sill at the western part of the Strait of Gibraltar have been analyzed in order to investigate the variability of the Mediterranean outflow. It is assumed that the observed variability comes from the changing properties of the dense waters that are located at the maximum depth from where they can be uplifted in the upstream basin (Alboran Sea, inside the Mediterranean Sea) and evacuated through the strait. From this perspective, the following three mechanisms are investigated: (1) the replenishment of the deep basin by newly formed Western Mediterranean Deep Water that, depending on its density, can either uplift old resident waters or lay above them leaving in any case a cold signature in the temperature... |
| Tipo: Text |
Palavras-chave: Mediterranean outflow; Alboran Sea gyres; Interannual variability; Strait of Gibraltar; Seasonality; WMDW. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00629/74113/73544.pdf |
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| Carracedo, Lidia; Gilcoto, M.; Mercier, Herle; Perez, Florian. |
| Annual and seasonal mean circulations in the Azores-Gibraltar Strait Region (North-Eastern Atlantic) are described based on climatological data. An inverse box model is applied to obtain absolute water mass transports consistent with the conservation of volume, salt and heat and the equations of the thermal wind. The large-scale gyre circulation (Azores Current, Azores Counter Current, Canary Current and Portugal Current) is well-represented in climatological data. The Azores Current annual mean transport was estimated to be 6.5±0.8 Sv (1 Sv = 106 m3/s) eastward, exhibiting a seasonal signal with minimum transport in the spring (5.3±0.8 Sv) and maximum transport in autumn (7.3±0.8 Sv). The Azores Current transport is twice that of the Azores Counter... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00171/28181/26415.pdf |
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| Fontela, Marcos; Perez, Fiz F; Carracedo, Lidia; Padín, Xosé A.; Velo, Antón; García-ibañez, Maribel I.; Lherminier, Pascale. |
| The oceanic uptake of atmospheric carbon dioxide (CO2) emitted by human activities alters the seawater carbonate system. Here, the chemical status of the Northeast Atlantic is examined by means of a high-quality database of carbon variables based on the GO-SHIP A25 section (1997–2018). The increase of atmospheric CO2 leads to an increase in ocean anthropogenic carbon (Cant) and a decrease in carbonate that is unequivocal in the upper and mid-layers (0–2,500 m depth). In the mid-layer, the carbonate content in the Northeast Atlantic is maintained by the interplay between the northward spreading of recently conveyed Mediterranean Water with excess of carbonate and the arrival of subpolar-origin waters close to carbonate undersaturation. In this study we show... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00646/75822/76790.pdf |
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| Garcia-ibanez, Maribel I.; Pardo, Paula C.; Carracedo, Lidia; Mercier, Herle; Lherminier, Pascale; Rios, Aida F.; Perez, Fiz F.. |
| We discuss the distributions and transports of the main water masses in the North Atlantic Subpolar Gyre (NASPG) for the mean of the period 2002–2010 (OVIDE sections 2002–2010 every other year), as well as the inter-annual variability of the water mass structure from 1997 (4x and METEOR sections) to 2010. The water mass structure of the NASPG, quantitatively assessed by means of an Optimum MultiParameter analysis (with 14 water masses), was combined with the velocity fields resulting from previous studies using inverse models to obtain the water mass volume transports. We also evaluate the relative contribution to the Atlantic Meridional Overturning Circulation (AMOC) of the main water masses characterizing the NASPG, identifying the water masses that... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00268/37968/36867.pdf |
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