Two sub-groups of 4 PROVBIO-2 floats (2 “flux” and 2 “chemistry”; total: 8 floats) will be deployed close to the Eastern and Western Kerguelen moorings, respectively.

• This strategy will allow a redundancy in measurements during the initial, short period of float deployment, which will be especially useful for the inter-comparison of sensors

The two PROVAL floats will be deployed on each side of the Kerguelen plateau to explore the bio-optical anomalies of the Southern Ocean over a range of Chla concentrations that is representative of what is typically encountered in Southern Ocean waters.