sample this underway seawater . In addition to this sampling , some instruments can run continuously , like pCO2 and pH ( in our lab ), and fluorescence , temperature , salinity ( which are measured on the clean sea-water supply by the ship ’ s instruments ).
Display showing the changes over the last two hours in water temperature , salinity , fluorescence and transmittance measured at the sea-water input . When this was photographed the water temperature ( purple ) was fluctuating by about one degree centigrade , probablybecause we were passing numerous icebergs .
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