Physical Oceanography, Vol.
EXPERIMENTAL AND FIELD RESEARCH
HYDROOPTICAL CHARACTERISTICS OF SUBSATELLITE TEST RANGES IN
THE MEDITERRANEAN AND BLACK SEAS ACCORDING TO THE DATA
OF INVESTIGATIONS PERFORMED BY THE R/V GORIZONT IN 1998
V. I. Man’kovskii, A. V. Mishonov, and M. V. Solov’ev
Hydrooptical investigations were performed for three subsatellite test ranges located near the
Rhodes Island in the Levant Sea, near Dardanelles in the north part of the Aegean Sea, and near
the Crimean Peninsula in the northwest part of the Black Sea. In the course of observations, we
measured the beam attenuation coefficient, the depth of visibility of the Secchi disk, and the
color of water. These data are used to characterize the space and time variability of the optical
properties of water in the investigated regions.
The aim of investigations carried out in the course of Cruise 2 of the R/V Gorizont (May 7–
June 5, 1998)
according to the “Satellite Oceanology” program was to determine the hydrooptical characteristics required for
the interpretation of data recorded by satellite instruments in contrastingly different water areas of the Mediterra-
nean Basin within the optical band. With regard for the data of previous investigations, the works were carried
out in the following water areas:
— north part of the Aegean Sea (near Dardanelles);
— north part of the Levant Sea (near the Rhodes Island);
— northwest part of the Black Sea (in the zone of the Rim Current and shelf waters).
The location of stations with optical measurements is shown in Fig.
1. The symbol
(en passage) marks
the points of taking samples from the moving vessel.
Equipment and Procedure of Measurements
We determined the following optical characteristics: the beam attenuation coefficient, the depth of visibility
of a standard
in diameter) Secchi disk
(according to the optical GOST, this parameter is called rel-
ative transparency; in what follows, it is called transparency), and the color of water (
) (measured in points
of a special scale).
The beam attenuation coefficient was measured with a laboratory autocollimation transparency meter  in
seven spectral bands corresponding to wavelengths of
Marine Hydrophysical Institute, Ukrainian Academy of Sciences, Sevastopol. Translated from Morskoi Gidrofizicheskii Zhurnal,
18–29, January–February, 2003. Original article submitted May 15, 2001; revision submitted June 8, 2001.
14 0928-5105/03/1301–0014 $25.00 © 2003 Plenum Publishing Corporation