Physical Oceanography, Vol. 18, No. 2, 2008
ANALYSIS OF OBSERVATIONS AND METHODS FOR CALCULATING
HYDROPHYSICAL FIELDS IN THE OCEAN
APPLICATION OF BIOOPTICAL RELATIONSHIPS FOR THE DETERMINATION
OF THE CHARACTERISTICS OF STATE OF MARINE MEDIA IN THE
OPTICAL MONITORING OF THE BLACK-SEA WATERS
PERFORMED BY USING TRANSPARENCY METERS
V. I. Man’kovskii and E. V. Man’kovskaya
As applied to the transparency meter installed in the hydrometeorological complex aimed at mo-
nitoring the Black-Sea coastal waters, we show the possibility of evaluation of various character-
istics of state of the marine medium according to the data of measurements of the beam attenua-
tion coefficient in two spectral regions: short- and long-wave. For this purpose, we use biooptic-
al relations established on the basis of the experimental data accumulated for the Black Sea.
In the optical monitoring of natural basins, it is customary to use the data of measuring the beam attenuation
coefficient. Thus, for the purposes of monitoring carried out at marine coastal hydrometeorological stations, a
“Briz” complex of equipment was developed at the Marine Hydrophysical Institute (Department of Automaton
of Oceanographic Investigations). The complex contains a transparency meter capable of measuring the beam
attenuation coefficient in two spectral regions: short-wave
The beam attenuation coefficient is an important optical characteristic containing information about the
state of the water medium. Its value depends on the contents of optically active substances in water: suspension,
chlorophyll, and dissolved organic compounds (yellow substance). At present, the exact values of the concentra-
tions of these substances are determined in water samples only under the laboratory conditions.
Note that it is impossible to find correct theoretical values of the concentrations of the indicated substances
for given values of the beam attenuation coefficient. To solve an inverse problem of this sort, it is necessary to
specify the values of the parameters of the corresponding models whose exact values could not be found in ad-
vance. Therefore, to find the concentrations of admixtures in water, one can use the empirical relations estab-
lished on the basis of the data of measurements. In addition, there exist experimentally established relations be-
tween the beam attenuation coefficient and various other hydrooptical characteristics that can also be used to get
additional information about the optical state of the water medium.
In the literature, one can also find empirical relations established specially for the Black-Sea waters. In the
present work, we perform the theoretical and experimental substantiation of these relations both in the general
case and as applied to the Black-Sea waters.
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol, Ukraine.
Translated from Morskoi Gidrofizicheskii Zhurnal, No.
37–45, March–April, 2008. Original article submitted November 10,
2006; revision submitted December 21, 2006.
78 0928-5105/08/1802–0078 © 2008 Springer Science+Business Media, Inc.