Fig. 11. Light and/or nutrient-limitation of phytoplankton growth (see Fig. 5) under conditions observed in the Labrador Sea (partitioned into shelves and central basin): Solid grey (NO₃) and black (SiO₃) lines are based on monthly (1 = January, 12 = December) climatological conditions of light and nutrients and red and blue points are based on average spring and summer conditions observed during LSMP missions (1994–2005). For these plots, the Nutrient Resource axis = NO₃ conc. or SiO₃ conc./N_t and the Light Resource axis = I_MLD/I_t.