PUBLICATIONS

Selected CO₂ -Pro Series Instruments Publications

The ICOS OTC pCO₂ Instrument Intercomparison

At-sea intercomparison of three underway pCO₂ systems

Application and assessment of a membrane-based pCO₂ sensor under field and laboratory conditions
Zong-Pei Jiang, D.J. Hydes, S.E. Hartman, M.C. Hartman, J.M. Campbell, B.D. Johnson, B. Schofield, D. Turk, D. Wallace, W.J. Burt, H. Thomas, C. Cosca, R. Feely. 2014. Limnology and Oceanography: Methods, 12, 264-280. DOI: 10.4319/lom.2014.12.264. READ ARTICLE

Biogeochemical variations at the Porcupine Abyssal Plain sustained Observatory in the northeast Atlantic Ocean, from weekly to inter-annual timescales
Susan E. Hartman, Z.-P. Jiang, D. Turk, R.S. Lampitt, H. Frigstad, C. Ostle, U. Schuster. 2015. Biogeosciences, 12, 845–853, DOI:10.5194/bg-12-845-2015. READ ARTICLE

Environmental and ecological controls of coral community metabolism on Palmyra Atoll
David Koweek, R.B. Dunbar, J.S. Rogers, G. J. Williams, N. Price, D. Mucciarone, L. Teneva. 2014. Coral Reefs, 34(1), 339–351. DOI 10.1007/s00338-014-1217-3. READ ARTICLE

Selected GTD-Pro Series Instruments Publications

In situ determination of oxygen and nitrogen dynamics in the upper ocean
Steven Emerson, C. Stump, B. Johnson, D.M. Karl. 2002. Deep-Sea Research I, 49, 941–952. READ ARTICLE

Continuous shipboard sampling of gas tension, oxygen and nitrogen
Craig McNeil D. Katz, R. Wanninkhof, B. Johnson. 2005. Deep-Sea Research I, 52, 1767–1785. READ ARTICLE

Air–sea gas exchange at extreme wind speeds measured by autonomous oceanographic floats
Eric D’Asaro and C.M. McNeil. 2007. Journal of Marine Systems, 66, 92-109. READ ARTICLE

Estimation of denitrification in Baltic Sea deep water from gas tension measurements
A. Löffler, B. Schneider, M. Schmidt, G. Nausch. 2011. Marine Chemistry, 125, 91-100. READ ARTICLE

In situ O₂ and N₂ measurements detect deep-water renewal dynamics in seasonally-anoxic Saanich Inlet
Roberta C. Hamme, J.E. Berry, J.M. Klymak, K.L. Denman. 2015. Continental Shelf Research, 106, 107-117. DOI: 10.1016/j.csr.2015.06.012. READ ARTICLE

References

Performance Demonstration Statement: Pro-Oceanus Systems Inc. PSI CO₂ -Pro™
2010. Alliance for Coastal Technologies. ACT DS10-03. WEBSITE | DOWNLOAD ARTICLE

N ₂ measurements by the gas tension method
Craig McNeil, Eric D’Asaro, and Bruce Johnson. DOWNLOAD ARTICLE

Report of the SNOMS Project 2006 to 2012 (Part 1 – Narrative Description): SNOMS SWIRE NOCS Ocean Monitoring System
David J. Hydes, M.C. Hartman, J.M. Campbell, Z.P. Jiang, S.E. Hartman, M. Pagnani, B.A. Kelly-Gerreyn, J. Donahoe. 2013. DOWNLOAD ARTICLE

Pro-Oceanus Systems Inc. System for the Transfer and Sensing of gas dissolved in liquid under pressure
PATENT: Bruce Johnson and Craig McNeil. US Patent 7,434,446 B2, October 14, 2008. DOWNLOAD ARTICLE

CASE STUDIES

PSI Case Study 1.1 2025 – Integration of Dissolved CO₂ Sensors Into an Autonomous Vehicle for Ocean Monitoring: The Liquid Robotics Wave Glider®
Accurate measurements of pCO₂ in the surface ocean are essential for determining the spatial and temporal distributions of ocean sources and sinks of anthropogenic CO₂ . However, traditional methods of oceanographic data collection, such as research cruises and Ships of Opportunity Program (SOOPs), can be costly, time consuming, and labor intensive leading to a barrier in the quality and quantity of data collected. READ MORE

PSI Case Study 1.2 2025 – Integration of Dissolved CO₂ Sensors Onto a Small Autonomous Vehicle for Ocean Monitoring: The BlueBoat
Accurate measurements of pCO₂ in the surface ocean are essential for determining the spatial and temporal distributions of ocean sources and sinks of anthropogenic CO₂ . However, traditional methods of oceanographic data collection, such as research cruises and Ships of Opportunity Progams (SOOPs), can be costly, time consuming, and labor intensive leading to a barrier in the quantity of data collected. READ MORE

PSI Case Study 1.3 2025 – Water Column pCO₂ Measurements in Coastal and Open Ocean Regions Using Buoys
Collecting timeseries measurements of pCO₂ in the deep and surface ocean is essential for determining water column carbon inventories and CO₂ fluxes. However, traditional methods of oceanographic data collection, such as research cruises and bottle sampling, can be costly, time consuming, and labor intensive. These types of data collection can also lead to spotty timeseries data because of issues with timing or a lack of consistency. READ MORE

PSI Case Study 1.4 2025 – Surface Ocean pCO₂ Measurements Using Voluntary Observing Ships
Consistent year-over-year oceanographic studies have become increasingly difficult to implement with the high costs of operating research vessels for oceanographic monitoring. For many, surface ocean monitoring program's Voluntary Observing Ships (VOS) have shown to be a viable alternative to dedicated research cruises with teams of technical and scientific staff. VOS have generally been used for monitoring ocean parameters such as sea-surface temperature, salinity, and carbonate chemistry, including pCO₂, for ocean acidification research. The use of VOS serve as a valuable tool to make connections between the limited research cruise data, as well as to provide a more global understanding of patterns and changes in the world’s oceans.  READ MORE