Abstract
Carbon dioxide concentration ranging in the pH values from 0.9 to 4.3 has been studied in the strongly acid lakes, with respect to its escaping rates from the lake surface to the atmosphere. Carbon dioxide concentration in such lakes was higher than that in water which was in an equilibrium state with carbon dioxide in the atmosphere. This can be explained by the supply of carbon dioxide from volcanic gases and by the decomposition of organic matter by microorganisms. The total amount of carbon dioxide escaping from acid lakes to the atmosphere was estimated. Its highest value 979mg C/m2/day was obtained in Lake Yugama (pH 0.9), while the lowest value was obtained in Lake Osoresanko (pH 3.4).
