Schematic diagram of the coupled sea ice-ocean biogeochemical model. Circles represent the model state variables: nitrate (NO3), ammonium (NH4), silicate (Si), ice algae (IA), small phytoplankton (P1), large phytoplankton (P2), microzooplankton (Z1), mesozooplankton (Z2), small detritus (D1), large detritus (D2), and biogenic silica (BSi). Sinking variables are bounded by yellow circles. Black and red arrows represent paths of nitrogen and silicon transfers between the variables, respectively: photosynthesis (PH), nitrification (NI), diffusive mixing (DI), flushing (FL), seeding (SE), linear mortality (LM), quadratic mortatlity (QM), remineralization (RE), grazing (GR), ingestion (IN), sloppy feeding (SL, for inefficient grazing that leaves unconsumed but dead prey), and excretion (EX). DOI: https://doi.org/10.1525/elementa.229.f1
