Physical Oceanography, Vol.
EXPERIMENTAL AND FIELD RESEARCH
SPECIFIC FEATURES OF THE DISTRIBUTION OF DISSOLVED OXYGEN
IN WATERS OF THE SEVASTOPOL BAY IN 2006–2007
S. I. Kondrat’ev
We discuss the influence of hydrophysical and biological-chemical processes on the distribution of dis-
solved oxygen in waters of the Sevastopol bay in various seasons. In the winter period, against the
background of low rates of biological-chemical processes, the hydrophysical processes provide the ho-
mogeneous distributions of temperature and oxygen. In summer, the hydrophysical processes remain
dominant, but the influence of biological-chemical processes becomes noticeable. In the autumn period,
the vertical distribution of oxygen is strongly affected by biological-chemical processes.
The active use of the Sevastopol bay in various spheres of economy (military and trade port, navigation, and
recreation purposes) raises much interest in the study of various aspects of the state of the marine environment in
the bay. In particular, numerous hydrobiological works characterizing the sanitary-biological state of waters of
the bay have been carried out in the last 15 years [1–3].
In 1998, the Marine Hydrophysical Institute and the Institute of Biology of Southern Seas of the Ukrainian
National Academy of Sciences began the joint interdisciplinary investigations of the ecosystem of the Sevas-
topol bay on a broad network of stations under the financial support of several INTAS projects. The results of
these studies carried out in 1998–2003 are presented in [4–7].
In March 2003, the Sevastopol Town Council of Deputies approved the Complex Program of Environ-
mental Protection, Rational Utilization of Natural Resources, and Ecological Safety of Sevastopol through 2010
, which included the ecological monitoring of the Sevastopol bay. The generalized results of joint interdisci-
plinary investigations and ecological monitoring of the Sevastopol bay performed within the framework of this
Program in 1998–2006 are presented in .
During the further monitoring of the Sevastopol bay in 2006–2007, three expeditions on studying the
water area were executed. In these expeditions, the concentrations of various hydrochemical components in
waters were determined. Of the most significant importance among these characteristics is the concentration of
dissolved oxygen, which characterizes the quality of sea water as the habitat in many aspects. In the present
work, we discuss specific features of the spatial distribution of dissolved oxygen for different hydrological sea-
sons: winter (February 2007), summer (June 2007), and autumn (October 2006), which allows us to trace quali-
tative intraannual variations of the distribution of oxygen in the water bulk of the Sevastopol bay.
Marine Hydrophysical Institute, Ukrainian National Academy of Sciences, Sevastopol, Ukraine; e-mail: email@example.com.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
63–76, March–April, 2010. Original article submitted November 26, 2008;
revision submitted March 25, 2009.
136 0928–5105/10/2002–0136 © 2010 Springer Science+Business Media, Inc.