Abstract.We develop an algorithm to compute pCO 2 in the Scotian Shelf region (NW Atlantic) from satellite-based estimates of chlorophyll-a concentration, sea-surface temperature, and observed wind speed. This algorithm is based on a high-resolution time-series of pCO 2 observations from an autonomous mooring. There is a gradient in the air-sea CO 2 flux between the northeastern Cabot Strait region which acts as a net sink of CO 2 with an annual uptake of 0.50 to 1.00 mol C m −2 yr −1 , and the southwestern Gulf of Maine region which acts as a source ranging from −0.80 to −2.50 mol C m −2 yr −1 . There is a decline, or a negative trend, in the air-sea pCO 2 gradient of 23 µatm over the decade, which can be explained by a cooling of 1.3 • C over the same period. Regional conditions govern spatial, seasonal, and interannual variability on the Scotian Shelf, while multi-annual trends appear to be influenced by larger scale processes.

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Canada's expanding “Blue Economy” requires a major expansion of existing ocean monitoring if developments are to be sustainably managed. Dalhousie University, the Ocean Tracking Network, and the Marine Environmental Observation Prediction and Response Network of Centers of Excellence have operated a mixed fleet of gliders for 7 years on missions covering >50,000 km. The data from these missions are used by research programs, nongovernmental organizations, and government agencies. The gliders have proven to be reliable platforms for ocean observation, collecting data in inclement weather, and times of the year when it is difficult to get ships at sea. However, glider operations have a steep learning curve, and much of the expertise that resides within an operational glider group is gleaned through experience. Managing glider data also poses significant challenges. Planning, risk management, rapid adaptation to the unexpected, and dedicated highly qualified personnel are the keys to sustaining successful glider operations.