Biogeochemistry: Further general thoughts CO2 observations Strong history in the Western Pacific Current mooring spacing could capture variability Need to understand the agencies’ interest in deployments Will likely lead to prioritizing and JAMSTEC analysis helps Where will sensors be purchased? Data QC and dissemination systems exist but may need discussions regarding data sharing Must maintain underway measurements on ships All of TPOS, not just the west. Saildrone emerging

Biogeochemistry: Further general thoughts O2 observations Sensors on moorings useful but vertical resolution difficult Particularly true in the east Exception: Prawler, high vertical/temporal resolution Additions to Argo seem most likely to provide benefit Requires international coordination Data processing implications but improving Budget implications Continued, possibly understandable resistance Needs further analysis to target deployments

Data from World Ocean Atlas Oxygen Minimum Zones hypoxia Data from World Ocean Atlas

Biogeochemistry: Further general thoughts O2 observations Sensors on moorings useful but vertical resolution difficult Particularly true in the east Exception: Prawler, high vertical/temporal resolution Additions to Argo seem most likely to provide benefit Requires international coordination Data processing implications but improving Budget implications Continued, possibly understandable resistance Needs further analysis to target deployments

Biogeochemistry: Further general thoughts Nutrient observations Strong history in the Western Pacific Continued observations on ships are important because they provide the full suite (N, P, Si) Only real option for automated observations is NO3 Moorings, Argo, (surface drifters, Saildrone?) Similar issues for O2 and NO3 on Argo, but worse Seriously consider a sub-subset of NO3 Argo

108 floats as of 1-Jun-2016. Red : NO3 and O2 108 floats as of 1-Jun-2016. Red : NO3 and O2. Yellow : biooptics, NO3 and O2.

Biogeochemistry: Further general thoughts Satellite ocean color TPOS supports continued missions Western Pacific challenging for high temporal resolution Geostationary promising: GOCI I and II Last decade has seen a transition from NASA to global Merging missions strengthens the value of the data set Requires cooperation across agencies

Biogeochemistry: Further general thoughts Ecosystems: Corals and fisheries Corals Dual threats from bleaching (warming) and acidification Warming well captured by satellites and moorings Acidification requires pCO2 but also DIC or direct pH Choose some long term monitoring sites Fisheries Fisheries requirements in their infancy in TPOS Possibly best left to national agencies to make use of the TPOS backbone

Main messages from BGC Task Team BGC on Argo Need to start coordinating to achieve this How many? Where? How to fund? CO2 on moorings and underway Identify priority areas Understand agencies’ interest Nutrients on ships Encourage and help data availability, analysis