This dataset includes a broad suite of biogeochemical measurements, particularly dissolvable iron. The measurements span the time period from August 1998 to December 2004 and were taken at the most inshore station of a set of three which are maintained by the Monterey Bay Aquarium Research Institute (MBARI). The data show a large pulse of dissolvable iron consistently occurring during the first spring upwelling event of each year that is derived from resuspended sediment. Iron concentrations then drop rapidly at all three stations. During the summer months, only the most inshore station (C1) maintains iron concentrations in excess of nitrate.