2024 October: surface buoy was deployed in February 2024 and was providing data. Due to communication failure in May 2024, the remaining data will be recovered when the buoy is visited for maintenance.
2024-03-05T14:27:23.152334Z
yes, satellite (Iridium) - only surface measurements
Transmission every 24 hours; Sensor sampling frequency: pCO2 and pH one measurement every 6 hours; Meteorological sensors sampling every 15 min, Oceanographic sensors: sampling every 1 hour
Biogeochemical variations at the Porcupine Abyssal Plain sustained Observatory in the northeast Atlantic Ocean, from weekly to inter-annual timescales Susan E. Hartman, Z.-P. Jiang, D. Turk, R.S. Lampitt, H. Frigstad, C. Ostle, U. Schuster. 2015. Biogeosciences, 12, 845–853, DOI:10.5194/bg-12-845-2015
IR detector
CO2 Membrane permeable, ProOceanus Technology CO2-PRO-CV
STEP2ONTRACK
CRMs provided by Andrew Dickson is used. However, due to sample limitation, secondary standards can be used prepared by members of the QUIMA group.
A fixed and well known volume of about 20 ml of seawater is acidified with phosphoric acid and the produced CO2 is analysed by Coulometric titration.
See for example, González-Dávila et al., 2010: González-Dávila, M., Santana-Casiano, J.M., Rueda, M.J., Llinás, O., 2010. The water column distribution of carbonate system variables at the ESTOC site from 1995 to 2004. Biogeosciences 7, 3067–3081. https://doi.org/10.5194/bg-7-3067-2010
Borosilicate glass bottles of 500 ml (those used for CRMs bottles by Scripps IO) are used. If not analysed on board, after sampling, 100 ul of oversaturated HgCl2 is added and sealed for analysis in the land laboratory a few days later. For analysis, A VINDTA a 3C system with coulometric titrator is used.
Spectrophotometric pH sensor (SP101-SM) developed by the QUIMA group (IOCAG-ULPGC) and SensorLab
Total Scale
Full (over 22 points) Potentiometric titration with HCl to the carbonic acid endpoint
Discrete water sampling: At Surface, 80-100, 150, and 1600m: Sea water salinity (sea water electrical conductivity PSS78) - Dissolved oxygen - Nutrients: nitrate + nitrite, phosphate, and silicate - Chlorophyll-a - Particle flux (sediment traps)
(González-Dávila et al., 2014; 2016): González-Dávila, M., Santana-Casiano, J. M., Prêcheur-Massieu, H., 2014. New pH sensor for monitoring ocean acidification. Sea Technology 36-40. González-Dávila, M., Santana-Casiano, J. M., Petihakis, G., Ntoumas, M., Suárez de Tangil, M., Krasakopoulou, E., 2016. Seasonal pH variability in the Saronikos Gulf: A year-study using a new photometric pH sensor. J. Mar. Syst. 162, 37–46. https://doi.org/10.1016/j.jmarsys.2016.03.007
Infrared detection
CO2-ProCV
Sensors: 3m above sea level: Atmospheric temperature - Relative humidity - Barometric pressure - Wind speed and direction - PAR ; At Surface, 80-100, 150, and 1600m: pH - Sea water pressure - Sea water temperature - Sea water salinity (sea water electrical conductivity PSS78) - Currents - - Dissolved oxygen (bottle sampling and sensor) - Nutrients: nitrate + nitrite, phosphate, and silicate (bottle sampling and nitrate sensor) - Chlorophyll-a (bottle sampling and sensor) - Particle flux (sediment traps)
Calculated with GRAN plot and non-linear curve fit.
Mintrop et al., 2000: Mintrop, L., Pérez, F.F., González-Dávila, M., Santana-Casiano, J.M., Körtzinger, A., 2000. Alkalinity determination by potentiometry: Intercalibration using three different methods. Ciencias Mar. 26, 23–37. https://doi.org/10.7773/cm.v26i1.573
discrete
Instituto Español de Oceanografía
ProOceanus
FOS
2023
PI: Eric Delory, Co-PI: Melchor Gonzalez-Dávila, Engineer: Andrés Cianca, Engineer: Rayco Moran, Engineer: Aridane Gonzalez, Engineer: David Gonzalez, Data manager: Maria Diaz, Data manager: Ruben Marrero
