Figure from Detection of ultraviolet radiation induced DNA damage in microbial communities of the Gerlache Strait

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Figure 2. Depth profiles of DNA damage on a day with moderate wind-driven mixing. Seas were approximately 0.5 m and wind speeds averaged 3.6 meters per second during the day. ( A ) Depth profile of cyclobutane dimers in water column samples collected at sunrise (a.m.) and again at 1800 (p.m.). On calm days, DNA damage will increase during the day with maximal damage at the surface and decrease with depth as seen in figure 1. In contrast here, CPD damage actually decreases during the day. ( B ) Damage patterns in dosimeters held at fixed depths confirm that potential damage in the absence of mixing would occur as might be predicted from UV-B attenuation.