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| Costa Da Silva, Alex; Chaigneau, Alexis; Dossa, Alina N.; Eldin, Gerard; Araujo, Moacyr; Bertrand, Arnaud. |
| Using current, hydrographic and satellite observations collected off Northeast Brazil around the Fernando de Noronha Archipelago and Rocas Atoll during two oceanographic cruises (spring 2015 and fall 2017), we investigated the general oceanic circulation and its modifications induced by the islands. In spring 2015, the area was characterized by lower SST (26.6°C) and deep mixed-layer (∼90 m). At this depth, a strong current shear was observed between the central branch of the eastward flowing near-surface South Equatorial Current and the westward flowing South Equatorial Undercurrent. In contrast, in fall 2017, SST was higher (∼28.8°C) and the mixed-layer shallower (∼50 m). The shear between the central South Equatorial Current and the South Equatorial... |
| Tipo: Text |
Palavras-chave: Mesoscale activity; Satellite data; Western tropical Atlantic; Shipboard measurements; Island wake; Central South Equatorial Current; South Equatorial Undercurrent. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00691/80290/83399.pdf |
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| Keraghel, Mehdia Asma; Louanchi, Ferial; Zerrouki, Mohamed; Kaci, Malik Ait; Aït-ameur, Nadira; Labaste, Matthieu; Legoff, Hervé; Taillandier, Vincent; Harid, Romaissa; Mortier, Laurent. |
| Recent studies have provided a better understanding of carbonate system parameters and their spatial and temporal variability in several areas of the Mediterranean Sea. This study uses a new dataset that covered the entire Algerian Basin during the summer of 2014 (SOMBA cruise) to describe the distribution of carbonate system parameters. The findings show that almost the entire basin was a source of CO2 to the atmosphere during the studied period. Besides the well-known TrOCA (Tracer combining Oxygen, Carbon and total Alkalinity) approach, the study proposes new parametrization for the standard back calculation method to assess the anthropogenic carbon concentration. The results of both approaches yield similar distributions and concentration ranges... |
| Tipo: Text |
Palavras-chave: Algerian Basin; Carbonate system; Anthropogenic carbon inventory; Acidification; Mesoscale activity. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00615/72729/71829.pdf |
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