Ecoinformatics Problems of the World Ocean - New Ecoinformatics Tools in Environmental Science: Applications and Decision-making - page 304

Fluctuations in the saturation of waters with oxygen may have an anthropogenic
origin, for instance, they may be due to oil pollutions or to large discharges of
sewage waters. The PCEM permits us to set some hypothetic experiments,
some instances of which are given in Figs. 4.12 and 4.13 . It is noticeable that the
model displays a high degree of stability with respect to the initial saturation of
water with oxygen and from the behavior of J(t) we see how rapidly the PCE
proceeds to the quasi-stationary regime of functioning at B 14 ( 60 mg/m 3 φ , ʻ , z, t 0 ) ≥

Fig. 4.12 The dynamics of the survivability function J(t) under different initial conditions of
water saturation with oxygen (it is shown on curves)

Fig. 4.13 The dynamics of the survivability function J(t) under variations of the rate of
photosynthetic oxygen production in percents of the model value ( ʴ 14 = 0.01)