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Atmospheric and Oceanic Optics

2014 year, number 6

Spatial distribution of carbon dioxide fluxes, nutrients and phytoplankton biomass in the pelagic zone of Lake Baikal in spring 2010-2012

V.M. Domysheva1, M.V. Usol'tseva1, M.V. Sakirko1, D.A. Pestunov2, M.N. Shimaraev1, G.I. Popovskaya1, M.V. Panchenko2
1Limnological Institute of the Siberian Branch of the RAS, 3, Ulan-Batorskaya str., 664033, Irkutsk, Russia
2V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
Keywords: carbon dioxide flux, air-water, biomass, Lake Baikal


The paper presents the results of measurements of concentrations of oxygen, biogenic elements, phytoplankton biomass and partial pressure of carbon dioxide in water and near-water atmosphere in the pelagic zone of Lake Baikal in June 2010-2012. The contrast weather conditions were observed in the region in winter and spring 2010-2012, which determined the behavior of hydrological and biological processes in the pelagic water zone of Baikal. The radical difference in weather conditions before expeditions of 2010-2012 made it possible to estimate a wide range of variability of the characteristics under study and to analyze their role in formation of fluxes at different stages of spring warming on the basis of three data arrays. The quantitative characteristics of phytoplankton biomass are compared with the difference of partial pressure of carbon dioxide in the air-water system.