[Atmospheric pO2 data] - SOS-Argo floats: atmospheric pO2 data acquired in different ocean basins between May 2012 and July 2023 (The Biological Pump in the Eastern Equatorial Pacific: in situ measurements of Oxygen and Nitrate)

The name SOS-Argo stands for “Special Oxygen Sensor Argo” Floats. These floats have standard Argo sensors for hydrostatic pressure, temperature, and salinity in addition to an Aanderaa oxygen sensor (optode) installed on a 61 cm stalk above the end cap of the float.

The tall stalk allows the float to make atmospheric pO2 measurements uncontaminated by surface waters while the float is at the surface during data transfer to shore. The atmospheric pO2 data are used for in situ calibration of the O2 sensor against atmospheric pO2.