Comparision of CTD pH meter against prototype GasPro pCO2 sensor at Panarea area 'crater' during cruise ECO2-4

Test results comparing CTD pH meter against prototype GasPro pCO2 sensor. Measurements were made along a c. 20m, E-W trending transect, with the first station furthest from the vent and the last located just beside it within the crater. The combined unit was placed on the sediments at each station and left for a period of about 15 minutes to collect data.