In Situ Ocean Acidification Environmental Observations: MBARI''s Cabled Observatory Technology for Controlled Studies of Changing Ocean pH

摘要

This poster explores modifications to the design, fabrication and implementation of the field tested prototype Free Ocean CO2 Enrichment (FOCE) system. The proof of concept prototype system was able in the field to control pH perturbations from acid release simulating CO2 induced pH changes in specific habitat experiments. The acidified flow was pumped so as to maintain a constant delta pH under varying environmental conditions. The modified FOCE system concept is to be powered and supplied by a cable and pipe system from shore, and to move towards CO2-rich water rather than acid releases. Discussion of the FOCE test results to date indicates paths to improved performance, with a primary problem being system design to accommodate the slow kinetics of the CO2 hydration reaction in sea water. This paper discloses current MBARI science and engineering efforts and concepts towards an ocean observing system solution by integrating the chemical kinematics of the CO2 water reaction and the next step in FOCE development for in situ science.