Geoscience Reference
In-Depth Information
The results of this study were mainly the realization developed of the new
informational technologies for the diagnostics of the Okhotsk Sea ecosystem state,
which produces the conditions for the development of such decisions on regional
and international levels, giving the possibility to defense the unique region from the
unwanted changes. These technologies include the methods for measurement of sea
water characteristics together with the use of sensors of spectroellipsometry and
microwave radiometry.
In order to achieve the basic goal of this study, it is necessary to solve a set of
particular tasks, between of them most important are:
1. Search of correlation between complexity of biological, physical, chemical and
social systems in the Okhotsk Sea region.
2. Determination of laws in cycles of energy and substrate within the Okhotsk Sea
ecosystem taking into account of levels of their organization.
3. Investigation of oceanological conditions in the whole Sea of Okhotsk on the
base of satellite observations.
4. Investigation of oceanological and hydrochemical conditions and zooplankton
status in the Aniva Gulf in different seasons from ship expeditions data; mooring
current measurements data analysis (eastern Sakhalin shelf).
5. Description of adaptation mechanisms for the Okhotsk Sea ecosystem elements
to the changes of environmental characteristics.
6. Search of constructive methods for the parameterization of structure of energy
and substance
flows in the Okhotsk Sea ecosystem, giving a possibility to
construct the effective small-scale simulation model of its functioning.
7. Adaptation of
fl
technology of geoecological
information
modeling system
(GIMS-technology) to the conditions of Okhotsk Sea region.
6.6.3.2 Biocomplexity Model of the Okhotsk Sea
The Okhotsk Sea belongs to the type of seas with high ecosystem productivity
(150
300 g C m 2 year 1 ) which functions under a rigorous climate. The structure
of the spatial-temporal
-
fields of the basic hydrological and ecological characteristics
of Okhotsk Sea is heterogeneous. The chemical, physical and biological processes
occuring in sea waters, have been studied by many authors to assess its biopro-
ductivity. According to the investigations by Terziev et al. (1993), the following
structural discretization of the Okhotsk Sea can be realized. Five ecological layers
exist. Layer 1, of maximal photosynthesis, is situated above the thermocline and has
a depth of about 20
30 m. In fact, it corresponds to the wind-mixed layer. Layer 2
occupies the water space from 30 to 150 m in depth. It has low temperatures and
oxygen saturation of about 80
-
-
90 %. Layer 3, characterized by low oxygen satu-
ration (15
750 m. Layer 4 extends from
750 m down to a depth of 1,500 m. This layer has minimal oxygen saturation (10
-
20 %), lies between the depth of 150
-
-
15 %). Lastly, layer 5 is situated deeper than 1,500 m. It is characterized by oxygen
saturation of 25
30 %.
-
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