2:15 PM - 2:30 PM
[ACG15-03] Field observations and the path analysis of CO2 fugacity in shallow coastal waters of Japan
Keywords:blue carbon, the fugacity of CO2 in water, seagrass meadow, tidal flat, coral reef, path analysis
In this study, using the path analysis, we investigated the mechanisms by which environmental factors directly and indirectly affecting the fugacity of CO2 in water. Field observations were performed to examine the fugacity of CO2 in water and environmental factors (e.g., water temperature, salinity, total alkalinity (TA), dissolved inorganic carbon (DIC), the metabolism (ΔDIC) and calcification (ΔTA)) in shallow waters. In situ measurements were conducted at boreal (Furen and Komuke lagoon), temperate (Hashirimizu coast, Nojima waterway, Matsuwa, Banzu and Futtsu tidal flat), and subtropical (Fukido estuary, Shiraho coast and Nagura Bay) sites in 2010~2015. In addition, we implemented the path analysis to infer important environmental factors and interactions affecting the fugacity of CO2 in water.