Information-Modeling Technology for the Environmental Monitoring - New Ecoinformatics Tools in Environmental Science: Applications and Decision-making - page 65

Table 1.10 (continued)
CO 2 reservoirs and fl uxes Identi er in

the model

Average estimate of the reservoir
(10 9 ux (10 9 t) and fl t/year)

Lowering with surface waters and due
to gravitational sedimentation

H 20 40

Photosynthesis

H 21

69

Underground sink

H 23

0.5

Surface sink

H 24

0.5 0.6

-

Breathing of living organisms in the
ocean

H 25

25

Geospheric sink of carbon H BG 70

Geospheric source of carbon H GB 17

model of the nitrogen cycle in nature should be based on the description of the
whole complex of natural processes and those initiated by humans. A general
description of supplies and fl fluxes of nitrogen is schematically given in Figs. 1.31 ,

1.32 , 1.33 , 1.34 and 1.35 .
The natural sources of nitrogen oxides are connected with the vital functions of
bacteria, volcanic eruptions, as well as several atmospheric phenomena (e.g.,
lightening discharges). The biogeochemical cycle of nitrogen includes the processes

Fig. 1.31 A scheme for the circulation of sulphur and nitrogen with the formation of acid
precipitation