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The photosynthesis plays an important role in the spatiotemporal variability of the content of dissolved gases and biogenic elements in Baikal water. At the same time, the sampling of representative water samples for analysis with the use of direct methods for measurement of the biomass of plankton algae and the intensity of photosynthesis in the entire lake depth (maximum depth exceeds 600 m) is connected with many technical and material difficulties. To a certain extent, they can complement the express methods of fluorescent analysis. This work continues the study of the influence of physical, hydrological, chemical, and biological processes on the СО2 exchange in the “water-atmosphere” system of Lake Baikal. The aim of this work was to examine the spatial (vertical and horizontal) distribution of fluorescent characteristics obtained in spring voyages of combined research expeditions all over the Baikal water area in 2010-2016.