Vol. 29, issue 12, article # 11

Abstract:

The results of the annual series of complex measurements of carbon dioxide, oxygen and nutrients in the water under ice of the littoral of the southern area of Lake Baikal, which were carried out since 2004 till 2016, are analyzed in the paper.
An important conclusion is the fact that the photosynthetic activity of the plankton at the end of the period of ice cover leads to a significant decrease in the partial pressure of carbon dioxide in the water(to 240–350 matm), which is noticeably less than the partial pressure of CO₂ in the atmosphere (about 385 matm), and consequently, the carbon dioxide flux during the period of removing ice from the littoral area of southern Baikal can be directed only from the atmosphere to the water surface.

Keywords:

Baikal, carbon dioxide, oxygen, nitrates, phosphates, silicon, ice period, diurnal variation, photosynthesis, optical characteristics of the ice

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