Eddy-resolving Simulation of Plankton Ecosystem Dynamics in the California Current System - Supplementary Material

originally used by Fasham et al. (1990),in order to account for the high concentrations of nitrate and low concentra-tions of ammonium generally encountered in upwelling regions. These valuesare also similar to those used in previous coupled circulation/ecosystem modelsimulations of the CCS (Moisan and Hofmann, 1996; Moisan et al., 1996).Three processes are responsible for the loss of phytoplankton biomass: zoo-plankton grazing, coagulation with small detritus, and mortality. The first twoprocesses are described in sections 1.2 and 1.4 below. Phytoplankton mortal-ity, which parameterizes a suite of processes including death by senescence,viral infections, etc. (see e.g. Christian and Anderson (2002)), is parameterizedusing a linear function with a mortality rate, η