Snow and ice thickness and ice algal biomass, varying pre-bloom biomass. Snow and ice thickness (cm) and ice algal biomass during sensitivity analyses of the simulated ice algal bloom to variation of pre-bloom biomass (b), prescribed at 10, 2, 1/2, and 1/10 times that in the standard simulation (solid black line). DOI: https://doi.org/10.1525/elementa.229.f10