Dataset: Measured Nutrients from the San Pedro Ocean Time-series (SPOT) station

Hydrographic data was collected from depth using a CTD system. Water collected from each depth was either processed within 4–8 h or frozen at -20°C for later analysis. Concentrations of NH4+ and urea were measured (triplicate) as previously described (Price and Harrison, 1987; Holmes et al., 1999; Taylor et al., 2007). Nitrate concentrations (the combined measurement of NO3- plus NO2-) and phosphate were analyzed (in triplicate) at the Marine Science Institute Analytical Laboratory at University of California, Santa Barbara by standard colorimetric methods (Parsons et al., 1984).