Information-Modeling Technology for the Environmental Monitoring - New Ecoinformatics Tools in Environmental Science: Applications and Decision-making - page 70

Fig. 1.36 Simplified scheme of the biogeochemical oxygen cycle in the biosphere

surface waters of the World Ocean. On the whole, for the oceans and long-lived
biota, oxygen completes its cycle for 500 and 50 years, respectively.
Oxygen is present in the biosphere in the form of molecular oxygen (O 2 ), ozone
(O 3 ), atomic oxygen (O), and as a constituent of various oxides. On the one hand,
oxygen maintains life on the Earth due to the process of respiration and formation
of the ozone layer, and on the other hand, it itself is the product of the organisms '

functioning. This fact hinders a description of its cycle, since it requires a synthesis
of the descriptions of various processes. Here an attempt has been made to describe
the cycle and to derive a model of the global biogeochemical oxygen cycle
(MGBO) as unit of the BCSS global model.
Many authors believe that in the nearest future nothing threatens the stability of
the global biogeochemical cycle of oxygen. This statement is not valid for ozone,
whose concentration and spatial distribution suffered serious changes during the last
decades. According to Kondratyev and Varotsos (2000), the available observations
of the vertical pro le of atmospheric ozone show a very complicated spatial and

temporal variability that depends on many characteristics of the nature-society
system. The MGBO unit at a parameterization of ozone fluxes follows a numerical

model by Aloyan (2004) and Arutiunian et al. (2004), with a needed correlation
taken into account. This correction consists in the substitution of some functional
dependence for scenarios re

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ecting the dynamics of changes in concentrations of
the chemicals not described in the global model of the carbon cycle.

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