Diatom vertical migration within land-fast Arctic sea ice

Composite photograph showing one ice core from each of plots 1, 3, 4, and 5 (left to right) sampled 11 May, 2005. These cores were used to generate data shown in Fig. 4-5a. The colored layer seen in each core is due to algal pigments. Overlying snow depth declined from plot 1 to plot 5 and the resultant difference in vertical distribution of the ice algae is visually apparent as a left to right decrease in the distance between the pigmented layer to the ice-water interface at the bottom of the cores. Under thinner snow cover, the algal layer was closer to the ice-water interface.