EuroSea project: 5 BGC floats deployed and 5 Deep floats ready to be

The EuroSea project is progressing as planned: 5 BGC floats with pH sensors have been deployed in the Atlantic and 5 Deep floats are ready to be deployed in June 2021. All these floats have been tested by the Euro-Argo ERIC team to maximise the chances of successful deployments at sea.

Deployment of 5 BioGeoChemical Argo floats with pH sensors in the tropical Atlantic 

  • Framed in the task on “Quality enhancement of tropical carbon fluxes through network optimization of the Tropical Atlantic Observing System” of the EuroSea Climate Demonstrator, the Euro-Argo ERIC has procured 5 BGC Argo floats equipped with dissolved oxygen, pH, chlorophyll-a, downwelling irradiance and backscatter sensors in addition to the CTD head.
  • Together with colleagues from SU/LOV, the technical team has performed intensive acceptance tests at the Ifremer premises (pool tank of 20 metres deep) to check several float components (hydraulic, communications) as well as sensors behaviour. Water samples have also been collected and analysed to measure dissolved oxygen concentration profiles in the pool simultaneous with the floats profiles, enabling to perform a first intercomparison and quality check of the floats data.  
  • Following the final deployment plan, the 5 floats have been deployed in the tropical Atlantic during the the PIRATA-FR31 cruise that took place in March-April 2021.
  • The collected data will help developing indicators for carbon flux at the air-sea interface and for ocean acidification based on an improved Atlantic observing system thanks to a neural network (CANYON) and with in situ data collected through fixed stations (PIRATA buoys with pCO2 sensors) and the planned future cruises (PIRATA etc.). 

Deployment of 5 BioGeoChemical Argo floats with pH sensors in the tropical Atlantic 

  • Framed in the task on “Quality enhancement of tropical carbon fluxes through network optimization of the Tropical Atlantic Observing System” of the EuroSea Climate Demonstrator, the Euro-Argo ERIC has procured 5 BGC Argo floats equipped with dissolved oxygen, pH, chlorophyll-a, downwelling irradiance and backscatter sensors in addition to the CTD head.
  • Together with colleagues from SU/LOV, the technical team has performed intensive acceptance tests at the Ifremer premises (pool tank of 20 metres deep) to check several float components (hydraulic, communications) as well as sensors behaviour. Water samples have also been collected and analysed to measure dissolved oxygen concentration profiles in the pool simultaneous with the floats profiles, enabling to perform a first intercomparison and quality check of the floats data.  
  • Following the final deployment plan, the 5 floats have been deployed in the tropical Atlantic during the the PIRATA-FR31 cruise that took place in March-April 2021.
  • The collected data will help developing indicators for carbon flux at the air-sea interface and for ocean acidification based on an improved Atlantic observing system thanks to a neural network (CANYON) and with in situ data collected through fixed stations (PIRATA buoys with pCO2 sensors) and the planned future cruises (PIRATA etc.).