Figure 1From: Vertical migration of phytoplankton in coastal waters with different UVR transparencyCalibration of the in vivo chlorophyll fluorometer, Fluorescence signals (millivolts) plotted versus the chlorophyll a concentrations (Chl a ), determined in situ and in water samples, respectively, within corresponding water depths at Hiddensee (A) and Helgoland (B). All data of vertical, spatial and temporal variations determined over the whole field campaigns are included.Back to article page