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Monitoring carbon Exchange at a times of change: observations at the GIFT (Gibraltar Fixed Time Series)

AuthorsFlecha, Susana ; Pérez, Fiz F. ; Huertas, I. Emma ; Ríos, Aida F. ; Prieto, Laura ; Hilmi, Karim; Makaoui, Ahmed; Zizah, S.; García-Lafuente, Jesús; Sammartino, Simone; Ruiz Segura, Javier
Ocean acidification
Gibraltar Strait
Issue DateJun-2014
CitationIMBeR Open Science Conference (2014)
AbstractThe Strait of Gibraltar, as the only connection of the Mediterranean Sea with the rest of theworld ́s oceans, represents the most suitable spot to track carbon exchange between basins. Water circulation in the Strait is characterized by an eastward surface inflow of Atlantic waters (AI) that is compensated by a deep outflow of Mediterranean waters (MOW), which abandons the basin towards the North Atlantic through the Gulf of Cadiz. This pattern of water exchange exhibits large fluctuations at different time scales, from seasonal and subinertial, both modulated by the change of atmospheric pressure in the Mediterranean basin, to tidal variability. The MOW and AI are the mixture of different water bodies that appear either intermittently or mixed in changing proportions throughout the year, which creates considerable spatial and temporal variations in the position and intensity of both water flows. This exchange of water masses with distinct thermohaline properties and carrying compounds at a different concentration influences the biogeochemical inventories of the Mediterranean and Atlantic basins. In particular, atmospheric CO2 capture in theregion and carbon transport through the channel are complex processes that are being monitored since 2005 at the Gibraltar Fixed Time Series (GIFT). In addition, a mooring linewas deployed at the GIFT in 2011 to examine the temporal variability of the carbon content in the Mediterranean water. The mooring line contains submersible autonomous sensors(SAMI-­‐CO2 and SAMI-­‐pH) to continuously record in situ pCO2 and pH. Data gathered at theGIFT is allowing us to identify relevant carbon cycle processes, such as ocean acidification, at a basin scale. Here we present a summary of the main results obtained in the area as a consequence of this monitoring program along with new records at a high temporal resolution. Data analysis has been preformed taking into account the variability in theproportion of the different water masses appearing in the Strait of Gibraltar.
DescriptionTrabajo presentado en la IMBeR Open Science Conference (Future Oceans: Research for marine sustainability: multiple stressors, drivers, challenges and solutions), celebrada en Bergen del 23 al 27 de junio de 2014.
Appears in Collections:(IIM) Comunicaciones congresos
(ICMAN) Comunicaciones congresos
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