Overview: Carbon dioxide and total alkalinity levels in ocean water are directly affected by atmospheric carbon dioxide levels. Increasing atmospheric carbon dioxide levels are acidifying the ocean and affecting marine chemistry and ecosystems. Precise and accurate determination of marine carbon dioxide system is essential to studying the marine carbon cycle and ocean acidification. An accurate measurement is obtained through simultaneous measurement of ocean dissolved inorganic carbon (DIC), total alkalinity (TA), and pH.
Technology: The Channelized Optical System (CHANOS) uses a modular design that is capable of making simultaneous spectrophotometric measurements of seawater. The compact system contains at least two channels and can be customized to measure different analytes by including different channels. CHANOS has individual channels for DIC, TA, heavy metals, and pH measurement, as well as pumps to control the flow into these channels. A separate housing contains all the controlling electronics, light sources and optical detection systems. The system can obtain near-continuous (12 sec) simultaneous measurements for each analytical channel. CHANOS is versatile and suitable for deployment on mobile and stationary platforms, such as buoys, profilers, AUVs, and ROVs.
CHANOS (CHANnelized Optical System)