TY - THES T1 - Proof-of-Concept: Automated High-frequency Measurements of PCO2 and TCO2 and Real-time Monitoring of the Saturation State of Calcium Carbonate Y1 - 2012 A1 - Vance, Jesse M. KW - calcium carbonate KW - carbon dioxide KW - climate change KW - Netarts Bay KW - pH KW - salinity KW - scientific instrumentation KW - Whiskey Creek KW - Whiskey Creek Shellfish Hatchery PB - Oregon State University CY - Corvallis, Or. UR - https://ir.library.oregonstate.edu/concern/graduate_projects/br86b7957 N1 - "The rapid increase in atmospheric carbon dioxide (CO2) over the last 250 years has led to the absorption of approximately 550 billion tons of anthropogenic CO2 by the global ocean. This oceanic uptake of CO2 has resulted in decreasing pH and alterations to carbonate chemistry, threatening many ecologically and economically important marine species. The majority of biological production takes place on highly dynamic coastal margins, which require instrumentation capable of high-frequency measurements. In practice, measurements of sufficient resolution often do not include all required analytical parameters necessary to constrain the carbonate chemistry in order to investigate biogeochemical processes relevant to ocean acidification. This report provides a proof-of-concept for the development of an instrument designed to make autonomous measurements of the partial pressure of CO2 (PCO2) and total CO2 (TCO2) in a continuous sample stream at high frequency, based on combination of two existing measurement techniques. " (from the Abstract) ER -