Seawater carbonate chemistry parameters model simulation results for Santa Barbara Basin, link to xlsx file

The 2013-2014 model‐based estimates of the carbonate system variables (total alankinity (TA), dissolved inorganic carbon (DIC), and saturation state of araongite and calcite (Ω)) and water column parameters (temperature, salinity, and nitrate concentration) near the site of the sediment trap in the Santa Barbara Basin stem from the simulations described in detail by Turi et al. (2016). Simulated water column parameters span from the sea surface (0 meters) to approximately 275 meters water depth. Based on these simulated values, the carbonate system calculation program, CO2SYS was used to estimate the remaining components of the carbonate system, including pH the fugacity, partial pressure, and concentration of CO2, bicarbonate ion, carbonate ion. The model is based on the UCLA‐ETH version of the Regional Oceanic Modeling System (Shchepetkin & McWilliams, 2005) and includes a nitrogen‐based nutrient‐phytoplankton zooplankton‐detritus model (Gruber et al., 2006) that was extended with a carbon module (Gruber et al., 2012; Hauri et al., 2013). The CalCS model setup employed here has a horizontal resolution of 5 km and 34 levels in the vertical and spans the entire U.S. coast from about 30°N to 50°N and extends more than 1,300 km into the Pacific. The boundary conditions at the lateral boundaries of the model consisted of a combination of climatological fields based on observations and time‐varying anomaly fields derived from a global hindcast simulation with the NCAR CCSM3 model (Graven et al., 2012).