Abstract
This is the next in the series of publications devoted to the analysis of seasonal features of the carbon dioxide exchange process in the littoral zone of Southern Baikal.
It is shown that, in the littoral zone of Lake Baikal by late July — early August, vigorous photosynthetic activity of summertime complex of water biota causes a reduction in the content of biogenic elements in the littoral lake water, and the annual minimum values of their concentrations are observed. The diurnal behavior of CO2 and O2 in the surface water layer, caused by the effect of water biota, is well pronounced and prevails over other processes. In the littoral zone of the lake, distinct diurnal variations in CO2 is observed in the entire water column, including the near-floor layers.
Photosynthetic activity of biota, persisting well into the spring-to-summer transition period, and the development of the summer population of plankton decrease the CO2 concentration. Strong carbon dioxide flux from the atmosphere to the water surface in the daytime, characteristic of this period, and the increase in sunshine duration also determine the maximum values of the diurnally averaged sink of carbon dioxide in the littoral zone of Lake Baikal during the summertime hydrological season as compared to the period of hydrological spring.
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Original Russian Text © V.M. Domysheva, M.V. Sakirko, D.A. Pestunov, M.V. Panchenko, 2013, published in Optica Atmosfery i Okeana.
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Domysheva, V.M., Sakirko, M.V., Pestunov, D.A. et al. Seasonal behavior of the CO2 gas exchange process in the “atmosphere-water” system of littoral zone of Southern Baikal. 2. Hydrological summer. Atmos Ocean Opt 26, 163–169 (2013). https://doi.org/10.1134/S1024856013020085
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DOI: https://doi.org/10.1134/S1024856013020085