Over years, discrete water samples have frequently been collected from the station and these are used to compare with sensor pCO2 measurements from the station.
2022 March and June: Two experiments have been performed in Gotland, where the pCO2 sensor has been deployed in a tank filled with Baltic water. Discrete water samples were also collected from the tank, and these were compared with the tank sensor pCO2. High natural variability, influence of organic alkalinity, low salinity have made it challenging to use the open ocean procedures for calculating the carbonate cycle. This has delayed the labelling severely.
2024 April: A newly built validation system for pCO2 (built by ICOS OTC) was run close to the stations pCO2 sensor. In addition, a Hagan-GENx pCO2 sensor have been used during summer season and will be part of the validation. The outcome from this validatin test was ready in October.
2024 October: Comparison between the station CO2 and the data from the ICOS OTC validation system is ongoing. Re dicrete carbon samples, the focus ohas been on Dissolved Inorganic Carbon (DIC).
2025 February: The comparison and validations are ready and ICOS OTC recommend that the station is labelled a ICOS Class 2 station.
2025-02-28T12:11:01.511672950Z
STEP2APPROVED
SBE 37SMP-IDO, EXO2, U24-002-C
No eq.
SAMI-CO2
Conductivity, temperature, Oxygen, pH, Chlorophyll-a, Turbidity. In addtion to water based measurements tower based high frequency measurements of fluxes and profiles
Seabird, YSI, Hobo
discrete and underway
Coastal/Marginal sea observatory
Sunburst
FOS
2016
PI: Anna Rutgersson, Engineer: Erik Nilsson, Engineer: John Prytherch
