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Figure 1: Relative response of biological weighting functions normalized at 300nm versus wavelength. Data from: [Jones Kok 1966 kinetics , Neale Lesser Cullen 1994 McMurdo, Cullen Neale 193, Rundel 1983, Hunter Taylor Moser 1979, Mitchell 1990 action model]

 
Figure 2: Average values for in situ phytoplankton productivity versus depth[m] within the marginal ice zone of the Bellingshausen Sea in austral spring of 1990. Comparison of productivity inside the ozone hole (stratospheric ozone levels less than 200 Dobson Units, DU) with productivity outside the hole (stratospheric ozone levels greater than 300 DU). Higher UV-B levels (inside the ozone hole) are consistently associated with reduced (left-hand curve) levels of production. Integration of these curves shows that higher UV-B levels within the ozone hole lead to a reduced water column production (6 to 12%). Adapted from Science, 1992, 255:952-959).